1. Read and understand entire owner's manual
before attempting assembly or operation.
2. Read and understand the warnings posted on
the machine and in this manual. Failure to
comply with all of these warnings may cause
serious injury.
3. Replace warning labels if they become
obscured or removed.
4. This band saw is designed and intended for use
by properly trained and experienced personnel
only. If you are not familiar with the proper and
safe operation of a band saw, do not use until
proper training and knowledge have been
obtained.
5. Do not use this band saw for other than its
intended use. If used for other purposes, JET
disclaims any real or implied warranty and holds
itself harmless from any injury that may result
from that use.
6. Always wear approved safety glasses/face
shield while using this machine. (Everyday
eyeglasses only have impact resistant lenses;
they are not safety glasses.)
7. Before operating band saw, remove tie, rings,
watches and other jewelry, and roll sleeves up
past the elbows. Remove all loose clothing and
confine long hair. Non-slip footwear or anti-skid
floor strips are recommended. Do not wear
gloves.
8. Keep work area clean. Cluttered areas and
benches invite accidents.
9. Use proper extension cord. Make sure your
extension cord is in good condition. When using
an extension cord, be sure to use one heavy
enough to carry the current your product will
draw. An undersized cord will cause a drop in
line voltage resulting in loss of power and
overheating. Table 1 shows the correct size to
use depending on cord length and nameplate
ampere rating. If in doubt, use the next heavier
gage. The smaller the gage number, the
heavier the cord.
10. Secure work. Use clamps or a vise to hold work
when practical. It’s safer than using your hand
and it frees both hands to operate tool.
11. Disconnect tools before servicing; when
changing accessories, such as blade, bits,
cutters and the like.
12. Direction of feed: Feed work into a blade or
cutter against the direction of rotation of the
blade or cutter only.
13. Maintain proper adjustment of blade tension,
blade guides, and thrust bearings.
14. Adjust upper blade guides to just clear
workpiece (approximately 1/8”).
15. Make sure blade tension, tracking and blade
guides are all properly adjusted.
16. Make relief cuts where possible, when cutting
curved stock.
17. When feeding small work pieces into blade,
always use push stick, fixture, or similar device
to keep hands at a safe distance.
18. Hold stock firmly and flat against table.
19. Wear ear protectors (plugs or muffs) during
extended periods of operation.
20. Some dust created by power sanding, sawing,
grinding, drilling and other construction
activities contain c hemicals known to cause
cancer, birth defects or other reproductive
harm. Some examples of these chemicals are:
• Lead from lead based paint.
• Crystalline silica from bricks, cement and
other masonry products.
•Arsenic and chromium from chemically
treated lumber.
Your risk of exposure varies, depending on how
often you do this type of work. To reduce your
exposure to these chemicals, work in a wellventilated area and work with approved safety
equipment, such as face or dust masks that are
specifically designed to filter out microscopic
particles.
21. Do not operate this machine while tired or under
the influence of drugs, alcohol or any
medication.
22. Make certain switch is in OFF position before
connecting machine to power supply.
23. Make certain machine is properly grounded.
24. Do not back stock out of blade while blade is
running.
25. Do not remove jammed cutoff pieces until blade
has stopped.
26. Remove adjusting keys and wrenches. Form a
habit of checking to see that keys and adjusting
wrenches are removed from the machine
before turning it on.
Page 3
27. Keep safety guards in place at all times when
machine is in use. If removed for maintenance
purposes, use extreme caution and replace the
guards immediately after completion of
maintenance.
28. Check damaged parts. Before further use of
machine, a guard or other part that is damaged
should be carefully checked to determine that it
will operate properly and perform its intended
function. Check for alignment of moving parts,
binding of moving parts, breakage of parts,
mounting and any other conditions that may
affect its operation. A guard or other part that is
damaged should be properly repaired or
replaced.
29. Keep floor around machine clean and free of
scrap material, oil and grease.
30. Keep visitors a safe distance from work area.
Keep children away.
31. Make your workshop child proof with padlocks,
master switches or by removing starter keys.
32. Give your work undivided attention. Looking
around, carrying on a conversation and “horseplay” are careless acts that can result in serious
injury.
33. Maintain a balanced stance at all times so that
you do not fall into blade or other moving parts.
Do not overreach or use excessive force to
perform any machine operation.
34. Use the right tool at the correct speed and feed
rate. Do not force a tool or attachment to do a
job for which it was not designed. The right tool
will do the job better and more safely.
35. Use recommended accessories; improper
accessories may be hazardous.
36. Maintain tools with care. Keep blades sharp and
clean for best and safest performance. Follow
instructions for lubricating and changing
accessories.
37. Turn off machine before cleaning. Use a brush
or compressed air to remove chips or debris —
not your hands.
38. Do not stand on machine. Serious injury could
occur if machine tips over.
39. Never leave machine running unattended. Turn
power off and do not leave band saw until blade
comes to a complete stop.
40. Remove loose items and unnecessary work
pieces from area before starting machine.
41. Keep hands out of line of saw blade.
42. Don’t use in dangerous environment. Do not
expose machine to rain or use in wet or damp
locations. Keep work area well lighted.
43. Remove safety key from switch whenever band
saw is turned “OFF”, and keep safety key out of
reach of unauthorized persons or children.
Familiarize yourself with the following safety notices used in this manual:
This means that if precautions are not heeded, it may result in minor injury and/or possible
machine damage.
This means that if precautions are not heeded, it may result in serious, or possibly even fatal,
injury.
SAVE THESE INSTRUCTIONS
3
Page 4
2.0 Table of contents
Section Page
1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2
2.0 Table of contents ............................................................................................................................................ 4
3.0 About this manual .......................................................................................................................................... 6
7.14 Guide post .............................................................................................................................................. 20
7.15 Guide post parallelism ............................................................................................................................ 20
9.1 General procedure ................................................................................................................................... 22
9.5 Blade lead ................................................................................................................................................ 23
9.10 Set .......................................................................................................................................................... 24
4
Page 5
9.11 Material ................................................................................................................................................... 24
12.2 Mechanical and electrical problems ....................................................................................................... 29
13.0 Replacement Parts ..................................................................................................................................... 30
14.1 Connections for 1.75HP (models 714600, 714700) ............................................................................... 62
14.2 Connections for 3HP (models 714650, 714750, 714800) ...................................................................... 63
14.3 Connections for 5HP (model 714850) .................................................................................................... 64
15.0 Warranty and service ................................................................................................................................. 65
5
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3.0 About this manual
This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model
JWBS-15, JWBS-18 and JWBS-20 Band Saw.
This manual contains instructions on installation, safety precautions, general operating procedures, maintenance
instructions and parts breakdown. Your machine has been designed and constructed to provide consistent, longterm operation if used in accordance with the instructions as set forth in this document.
This manual is not intended to be an exhaustive guide to band saw operational methods, use of jigs or aftermarket accessories, choice of stock, etc. Additional knowledge can be obtained from experienced users or trade
articles. Whatever accepted methods are used, always make personal safety a priority.
If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our
web site: www.jettools.com.
Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it.
Read and understand the entire contents of this manual before attempting assembly or
operation! Failure to comply may cause serious injury!
4.0 Specifications
The specifications in this manual were current at time of publication, but because of our policy of continuous
improvement, JET reserves the right to change specif ications at any time and without prior notice, without incurring
obligations.
6
Page 7
4.1 Specifications for JWBS-15
Model number .............................................................................. JWBS-15 .......................................... JWBS-15-3
Stock number .................................................................................. 714600 ................................................. 714650
Band saw nominal size ....................................................................... 15 in. .................................................... 15 in.
Motor and electricals:
Motor type……………………………………………..totally-enclosed fan-cooled, induction, capacitor start ................
Horsepower ................................................................................... 1.75 HP ..................................................3 HP
Phase............................................................................................... single ................................................ single
Voltage .............................................................. 115/230V (prewired 115V) ................................................. 230V
Run capacitor ....................................................................... 40μF 250VAC .................................... 60μF 300VAC
Power transfer ............................................................................ poly v-belt ..........................................poly v-belt
On/off switch .................................................. push button with paddle stop ............. push button, magnetic starter
Motor speed .............................................................................. 1720 RPM ......................................... 1720 RPM
Power cord length .................................................................. 6 ft. (183 cm) ..................................... 6 ft. (183 cm)
Power plug installed ........................................................................... 115V ................................................. 230V
Recommended circuit size
Sound emission
2
…………………………………………………..75 dB at 40” (1000mm) from blade, without load .......
Capacities and speeds:
Wheel diameter ........................................................... 14-3/4 in. (375 mm) ........................... 14-3/4 in. (375 mm)
Resaw capacity (cutting height) .......................................... 14 in. (356 mm) ................................. 14 in. (356 mm)
Throat capacity ............................................................ 14-1/8 in. (359 mm) ........................... 14-1/8 in. (359 mm)
Maximum rip left of blade with fence ............................. 12-3/8 in. (316 mm) ........................... 12-3/8 in. (316 mm)
Maximum rip right of blade with fence ............................... 2-7/8 in. (73 mm) ............................... 2-7/8 in. (73 mm)
Blade length .............................................. 133 in. (min. 131.8; max. 133.5) ......... 133 in. (min. 131.8; max. 133.5)
Minimum blade width ........................................................................ 1/8 in. ................................................ 1/8 in.
Maximum blade width .......................................................................... 1 in. ................................................... 1 in.
Blade provided .............................................. Hook, 1/2" x 0.0256 thk 6 TPI ............. Hook, 1/2" x 0.0256 thk 6 TPI
Main Materials:
Table ............................................................................. ground cast iron .................................... ground cast iron
Trunnion .................................................................................... cast iron ............................................... cast iron
Band wheels .............................................................................. cast iron ............................................... cast iron
Table dimensions…………………………………………………………21-1/2 x 16 x 2 in. (546 x 406 x 51 mm) ..........
Table tilt .......................................................................... Left 5°, Right 45° .............................. Left 5°, Right 45°
Table height from floor ....................................................... 35 in. (889 mm) ................................. 35 in. (889 mm)
Miter T-slot .................................................................3/4 in. W x 0.35 in. H ......................... 3/4 in. W x 0.35 in. H
Resaw fence size LxWxH............................................ 18-1/8 x 1-3/4 x 6 in. .......................... 18-1/8 x 1-3/4 x 6 in.
Miter gauge angle .......................................................... Left 45°, Right 45° ............................. Left 45°, Right 45°
Dimensions:
Footprint (base size), LxWxH……………………………………….25-1/2 x 21-5/8 x 2 in. (648 x 549 x 51 mm) ..........
Overall dimensions, LxWxH…………………………………………29-1/2 x 32 x 74 in. (750 x 812 x 1880 mm) ..........
Shipping package dimensions…………………………………....30 x 24-1/2 x 79-1/2 in. (760 x 625 x 2020 mm) .......
Dust collection:
Dust port outside diameter ............................................... 4 in. (100mm) x 2 ...............................4 in. (100mm) x 2
Net ................................................................................ 382 lbs (174 kg) .................................... 382 lbs (174 kg)
Shipping ........................................................................ 446 lbs (203 kg) .................................... 446 lbs (203 kg)
1
Subject to local/national electrical codes. 2 The specified values are emission levels and are not necessarily to be
seen as safe operating levels. As workplace conditions vary, this information is intended to allow the user to make a
better estimation of the hazards and risks involved only.
Model number .............................................................................. JWBS-18 .......................................... JWBS-18-3
Stock number .................................................................................. 714700 ................................................. 714750
Band saw nominal size ....................................................................... 18 in. .................................................... 18 in.
Motor and electricals:
Motor type…………………………………………….. totally-enclosed fan-cooled, induction, capacitor start ...............
Horsepower ................................................................................... 1.75 HP ..................................................3 HP
Phase............................................................................................... single ................................................ single
Voltage .............................................................. 115/230V (prewired 115V) ................................................. 230V
Run capacitor ....................................................................... 40μF 250VAC .................................... 60μF 300VAC
Power transfer ............................................................................ poly v-belt ..........................................poly v-belt
On/off switch .................................................. push button with paddle stop ............. push button, magnetic starter
Motor speed .............................................................................. 1720 RPM ......................................... 1720 RPM
Power cord length .................................................................. 6 ft. (183 cm) ..................................... 6 ft. (183 cm)
Power plug installed ........................................................................... 115V ................................................. 230V
Recommended circuit size
Sound emission
2
…………………………………………….75 dB at 40” (1000 mm) from blade, without load ..............
Capacities and speeds:
Wheel diameter ........................................................................... 18-1/2 in. ........................................... 18-1/2 in.
Resaw capacity (cutting height) .......................................................... 16 in. ................................................. 16 in.
Throat capacity .................................................................................. 18 in. ................................................. 18 in.
Maximum rip left of blade with fence ................................................... 16 in. ................................................. 16 in.
Maximum rip right of blade with fence ............................................. 4-1/2 in. ............................................. 4-1/2 in.
Blade length ................................................. 150 in. (max. 150.9; min. 149) ............ 150 in. (max. 150.9; min. 149)
Blade width.......................................................................... 1/8 to 1-1/4 in. ................................... 1/8 to 1-1/4 in.
Blade provided .............................................. Hook, 3/4" x 0.0256 thk 6 TPI ............. Hook, 3/4" x 0.0256 thk 6 TPI
Blade speed ............................................................... 2300 and 3800 FPM .......................... 2300 and 3800 FPM
Main Materials:
Table ............................................................................. ground cast iron .................................... ground cast iron
Trunnion .................................................................................... cast iron ............................................... cast iron
Band wheels .............................................................................. cast iron ............................................... cast iron
Table dimensions ..................................................... 27-1/4 x 20 x 1-5/8 in. ........................ 27-1/4 x 20 x 1-5/8 in.
Table tilt .......................................................................... Left 5°, Right 45° .............................. Left 5°, Right 45°
Table height from floor ....................................................... 37 in. (940 mm) ................................. 37 in. (940 mm)
Miter T-slot ............................................................... 3/4 in. W x 0.375 in. H ........................3/4 in. W x 0.375 in. H
Resaw fence size LxWxH............................................ 22-1/2 x 1-3/4 x 6 in. .......................... 22-1/2 x 1-3/4 x 6 in.
Miter gauge angle .......................................................... Left 45°, Right 45° ............................. Left 45°, Right 45°
Dimensions:
Footprint (base size), LxWxH……………………………….29-1/2 x 21-5/8 x 2 in. (750 x 550 x 50.8 mm) .................
Overall dimensions, LxWxH……………………………………36 x 34 x 80 in. (914 x 864 x 2032 mm).......................
Shipping package dimensions…………………………………31 x 26 x 85 in. (780 x 660 x 2168 mm).......................
Dust collection:
Dust port outside diameter ............................................... 4 in. (100mm) x 2 ...............................4 in. (100mm) x 2
Net ................................................................................ 502 lbs (228 kg) .................................... 502 lbs (228 kg)
Shipping ........................................................................ 572 lbs (260 kg) .................................... 572 lbs (260 kg)
1
Subject to local/national electrical codes. 2 The specified values are emission levels and are not necessarily to be
seen as safe operating levels. As workplace conditions vary, this information is intended to allow the user to make a
better estimation of the hazards and risks involved only.
Model number ........................................................................... JWBS-20-3 .......................................... JWBS-20-5
Stock number .................................................................................. 714800 ................................................. 714850
Band saw nominal size ....................................................................... 20 in. .................................................... 20 in.
Motor and electricals:
Motor type…………………………………………….. totally-enclosed fan-cooled, induction, capacitor start ...............
Horsepower ........................................................................................ 3 HP ..................................................5 HP
Phase............................................................................................... single ................................................ single
Voltage .............................................................................................. 230V ................................................ 230V
Run capacitor ....................................................................... 60μF 300VAC .................................... 45μF 450VAC
Power transfer ............................................................................ poly v-belt ..........................................poly v-belt
On/off switch ................................................. push button, magnetic starter ............. push button, magnetic starter
Motor speed .............................................................................. 1720 RPM ......................................... 1720 RPM
Power cord length .................................................................. 6 ft. (183 cm) ..................................... 6 ft. (183 cm)
Power plug installed ........................................................................... 230V ................................................. 230V
Recommended circuit size
Sound emission
2
…………………………………………………75 dB at 40” (1000mm) from blade, without load .........
Capacities and speeds:
Wheel diameter ........................................................... 20-1/4 in. (514 mm) ........................... 20-1/4 in. (514 mm)
Resaw capacity (cutting height) ....................................... 16 in. (406.4 mm) .............................. 16 in. (406.4 mm)
Throat capacity .................................................................. 20 in. (508 mm) ................................. 20 in. (508 mm)
Maximum rip left of blade with fence ............................. 18-1/2 in. (470 mm) ........................... 18-1/2 in. (470 mm)
Maximum rip right of blade with fence ............................ 4-1/2 in. (114 mm). ............................ 4-1/2 in. (114 mm).
Blade length ............................................... 158 in. (max 158.9; min. 157.1) .......... 158 in. (max 158.9; min. 157.1)
Blade width.......................................................................... 1/8 to 1-1/2 in. ................................... 1/8 to 1-1/2 in.
Blade speed ............................................................... 2530 and 4850 FPM .......................... 2530 and 4850 FPM
Blade provided ...................................................Hook, 1" x 0.035 thk 3 TPI ................. Hook, 1" x 0.035 thk 3 TPI
Main Materials:
Table ............................................................................. ground cast iron .................................... ground cast iron
Trunnion .................................................................................... cast iron ............................................... cast iron
Band wheels .............................................................................. cast iron ............................................... cast iron
Table dimensions ..................................................... 27-1/4 x 20 x 1-3/4 in. ........................ 27-1/4 x 20 x 1-3/4 in.
Table tilt .......................................................................... Left 5°, Right 45° .............................. Left 5°, Right 45°
Table height from floor at 90 degrees ................................. 37 in. (940 mm) ................................. 37 in. (940 mm)
Miter T-slot .................................................................3/4 in. W x 0.35 in. H ......................... 3/4 in. W x 0.35 in. H
Resaw fence size LxWxH............................................ 22-1/2 x 1-3/4 x 6 in. .......................... 22-1/2 x 1-3/4 x 6 in.
Miter gauge angle .......................................................... Left 45°, Right 45° ............................. Left 45°, Right 45°
Dimensions:
Footprint (base size), LxWxH……………………………………31-1/2 x 21-5/8 x 2 in. (800 x 550 x 50.8mm) ............
Overall dimensions, LxWxH .......................................... 37 x 33-1/8 x 88 in. ............................ 37 x 32-1/4 x 88 in
(940 x 842 x 2235 mm) (940 x 819 x 2235 mm)
Dust collection:
Dust port outside diameter ............................................... 4 in. (100mm) x 2 ...............................4 in. (100mm) x 2
Net ................................................................................ 544 lbs (247 kg) ................................. 588.5 lbs (267 kg)
Shipping ........................................................................ 617 lbs (280 kg) .................................... 661 lbs (300 kg)
1
Subject to local/national electrical codes. 2 The specified values are emission levels and are not necessarily to be
seen as safe operating levels. As workplace conditions vary, this information is intended to allow the user to make a
better estimation of the hazards and risks involved only.
contents of this manual before attempting
assembly or operation. Failure to com ply may
cause serious injury.
5.0 Setup and assembly
5.1 Shipping contents
Refer to Figure 5-1.
1 Band saw (not shown)
1 Fence body – A
1 Resaw fence – B
1 Table – C
1 Table insert – D
1 Guide rail – E
1 Lifting ring – F
1 Handwheel with handle – G
1 Miter gauge assembly – H
The tools listed below are not included but are
required for assembly.
1 2.5mm hex key
1 3mm hex key
1 straight edge
1 17mm wrench
1 13mm wrench
5.3 Unpacking and cleanup
Remove crate and packing material from band saw
except for the transport skid on the bottom. Inspect
the machine for damage. Report any damage to
your distributor and shipping agent. Do not discard
packing material until machine is assembled and
running satisfactorily.
Move the saw to its permanent working location.
The site should be dry, well lit, and have enough
room to handle long stock and servicing or
adjustment of the machine from any side.
Install lifting ring atop band saw, and use hoist to
move saw off skid. Clean all rust protected surfaces
with a mild solvent or diesel fuel and a soft cloth. Do
not use lacquer thinner, paint thinner, or gasoline,
as these will damage painted surfaces.
5.4 Assembly
Band saw must be
disconnected from power source during
assembly procedures. Failure to comply may
cause serious injury.
Figure 5-1: contents
5.5 Handwheel
Install handwheel (G, Figure 5-2) onto shaft, and
tighten two set screws with 3mm hex key.
Figure 5-2
5.6 Installing and aligning table
Table is heavy. Mounting with
the help of another person is recommended.
Refer to Figures 5-3 through 5-4:
1. Slide table so that saw blade passes through
slot (A).
11
Page 12
2. Line up table to trunnions, and insert four hex
cap screws with lock washers and flat washers
(Figure 5-4). Hand tighten screws only.
3. Check that table is parallel to blade: Move blade
tension lever to Full Tension position (shown in
Figure 7-9), and place a long straightedge flush
against blade, making sure it contacts both front
and back of blade. See Figure 5-5. (Do not
deflect blade by pushing into it.)
4. Use a gauge to carefully measure distance from
miter slot to straight edge. Take measurements
at both front and back of table – these should
be identical.
5. If miter slot is not parallel to blade, shift table as
needed.
6. Tighten the four screws (Figure 5-4) securely.
7. Install table insert (D, Figure 5-3). (See sect. 7.5
to level insert with table.)
8. Install slot handle assembly (HP6), and tighten.
Figure 5-3
5.7 Installing guide rail
Refer to Figure 5-6.
1. Attach guide rail (E) to table by inserting the two
threaded studs into the table edge. Secure with
the included fasteners (see inset). Do not fully
tighten yet until fence adjustments have been
made in the following section.
Figure 5-6
5.8 Fence assembly and alignment
Refer to Figure 5-7.
1. Slide fence body (A, Figure 5-7) onto guide rail
and move fence body to right of blade.
2. Install resaw fence (B) and tighten with two
knobs (A1).
3. Slide resaw fence against edge of miter slot, as
shown, and t ighten handle (A2) to lock position.
The fence should align parallel to miter slot
along entire length of fence.
If adjustment is needed:
4. Loosen and rotate hex nuts on guide rail studs
(A3) as needed, until resaw fence is parallel to
miter slot.
5. Tighten nuts on guide rail studs.
Figure 5-4
Figure 5-5
Figure 5-7
12
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5.9 Table bracket (JWBS-20 only)
Install bracket (J, Figure 5-8) to back edge of table.
Level with top surface of table and tighten screws.
Figure 5-8
5.10 Miter gauge
Refer to Figure 5-9.
an electric cord having an equipment-grounding
conductor and a grounding plug. The plug must be
plugged into a matching outlet that is properly
installed and grounded in accordance with all local
codes and ordinances.
Do not modify the plug provided - if it will not fit the
outlet, have the proper outlet installed by a qualified
electrician.
Improper connection of the equipment-grounding
conductor can result in a risk of electric shock. The
conductor with insulation having an outer surface
that is green with or without yellow stripes is the
equipment-grounding conductor. If repair or
replacement of the electric cord or plug is
necessary, do not connect the equipment-grounding
conductor to a live terminal.
Before connecting to power source, be sure the
switch is in off position.
1. Slide miter gauge into table slot.
2. Use a square to verify that miter gauge face is
square to blade.
3. If miter gauge is not square to blade, loosen
lock knob (H1, Figure 5-9) and adjust to proper
setting. Tighten lock knob.
4. If pointer is not at 90 degrees, loosen screw (H2)
and shift pointer to 90 degrees.
5. Tighten screw.
Figure 5-9
6.0 Electrical connections
Electrical connections must be
made by a qualified electrician in compliance
with all relevant codes. This machine must be
properly grounded to help prevent electrical
shock and possible fatal injury.
6.1 GROUNDING INSTRUCTIONS
Check with a qualified
electrician or service personnel if the grounding
instructions are not completely understood, or if
in doubt as to whether the tool is properly
grounded. Failure to comply may cause serious
or fatal injury.
Use only 3-wire extension cords that have 3-prong
grounding plugs and 3-pole receptacles that accept
the tool's plug.
Repair or replace damaged or worn cord
immediately.
6.2 Models JWBS-15, JWBS-18
Model JWBS-15 and JWBS-18 Band Saws are
wired from the factory for 115 volt operation, but can
be rewired for 230 volts.
115 Volt Operation
The JWBS-15 and JWBS-18 Band Saw are for use
on a nominal 115-V circuit, and have a grounded
plug that looks like the plug illustrated in sketch A in
Figure 6-1. A temporary adaptor that looks like the
adaptor illustrated in sketches B and C may be used
to connect this plug to a 2-pole receptacle as shown
in sketch B if a properly grounded outlet is not
available. The temporary adaptor should be used
only until a properly grounded outlet can be installed
by a qualified electrician. The green colored rigid
ear, lug, or the like extending from the adaptor must
be connected to a permanent ground such as a
properly grounded outlet box cover. Whenever the
adaptor is used, it must be held in place by a metal
screw.
In Canada, the use of a temporary adaptor is not
permitted by the Canadian Electrical Code, C22.1.
This machine must be grounded. In the event of a
malfunction or breakdown, grounding provides a
path of least resistance for electric current to reduce
the risk of electric shock. This tool is equipped with
13
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Figure 6-1
230 Volt Operation
To convert the JWBS-15 or JWBS-18 from 115V to
230V, single phase operation, the following is
strongly recommended:
Contact your local Authorized JET Service Center
or qualified electrician for proper procedures to
install the plug. The band saw must comply with all
local and national codes after the 230V plug is
installed.
1. Switch the motor lead wires inside the motor
junction box, according to the diagram found
inside the junction box cover.
2. The 115V attachment plug supplied with the
band saw (A, Figure 6-1) must be replaced with
a UL/CSA listed plug suitable for 230V
operation (D, Figure 6-1).
The band saw with a 230V plug should only be
connected to an outlet having the same
configuration (D, Figure 6-1). No adapter is
available or should be used with the 230V plug.
Important: In all cases (115 or 230 volts), make
certain the receptacle in question is properly
grounded. If you are not sure, have a registered
electrician check the receptacle.
6.3 Models JWBS-15-3, JWBS-18-3,
JWBS-20-3, JWBS-20-5
Band saw models JWBS-15-3, JWBS-18-3, JWBS20-3, and JWBS-20-5 are wired from the factory for
230 volt operation only. Refer to Specifications for
phase and HP ratings.
This tool is intended for use on a circuit that has an
outlet that looks like the one illustrated in D, Figure
6-1. The tool has a grounding plug that looks like the
plug illustrated in D. Make sure the tool is connected
to an outlet having the same configuration as the
plug. No adapter is available or should be used with
this tool. If the tool must be reconnected for use on
a different type of electric circuit, the reconnection
should be made by qualified service personnel; and
after reconnection, the tool should comply with all
local codes and ordinances.
6.4 Circuit Information (all models)
The Band Saw should be connected to a dedicated
circuit with a circuit breaker or time delay fuse rated
“D” with the appropriate amperage rating. See Table
1 for recommended circuit sizes. Local codes take
precedence over recommendations.
Recommended
Model Voltage
714600, JWBS-15 115 V 20A
714650, JWBS-15-3 230 V 20A
714700, JWBS-18 115 V 20A
714750, JWBS-18-3 230 V 20A
714800, JWBS-20-3 230 V 20A
714850, JWBS-20-5 230 V 30A
Circuit*
* Local codes take precedence over recommendations.
Table 1
6.5 Extension cords
The use of extension cords is discouraged; try to
position your machine within reach of the power
supply. If an extension cord becomes necessary,
make sure the cord rating is suitable for the
amperage listed on the machine’s motor plate. An
undersized cord will cause a drop in line voltage
resulting in loss of power and overheating.
Use the chart in Table 2 as a general guide in
choosing the correct size cord. If in doubt, use the
next heavier gauge. The smaller the gauge number,
the heavier the cord.
Recomm end ed Ga ug es (A WG ) of Extensi on Co rd s
Ampere
Rating
More
Than
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12
Not
More
Than
Volts
120
240
AWG
Total length of
cord in feet
25
50
50
100
Table 2
100
200
Not
Recommended
150
300
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7.0 Adjustments
7.1 Aluminum resaw fence
Refer to Figures 7-1 and 7-2.
Loosen knobs (A1) until lock bar protrudes enough
on which to slide the aluminum fence plate from one
end, as shown in Figure 7-1. Retighten knobs.
Figure 7-1: vertical position
The aluminum fence plate can be installed in one of
two positions; vertically (resaw position), as shown
in Figure 7-1; or horizontally as shown in Figure 7-
2.
Horizontal position is useful for smaller workpieces.
(Zero setting of cursor cannot be used with
horizontal fence position.)
Figure 7-3
7.3 Table tilt
Refer to Figure 7-4.
1. Disconnect machine from power source.
2. Loosen lock handle (D).
3. Tilt table up to 45 degrees to the right (as
viewed from operator side), or up to 5 degrees
to the left.
4. Tighten lock handle.
Note: Table stop bolt (F, Figure 7-4) must be pivoted
out of the way to tilt table to the left.
Figure 7-2: horizontal position
7.2 Fence fine adjust
Refer to Figure 7-3.
1. Loosen fence lock knob (A, Figure 7-3).
2. Loosen knob (B).
3. Slide fence to approximate position, based on
the scale measurement aligning with the right
side of resaw fence.
4. Tighten knob (B).
5. Rotate knurled knob (C) to achieve fine
adjustment.
6. When setting is reached, tighten fence lock
knob (A).
Figure 7-4
7.4 Adjusting 90-degree table stop
Before adjusting the 90º table stop, the blade
tension must be properly adjusted (see sect. 7.7)
To adjust 90º table stop:
1. Loosen lock handle (D, Figure 7-4) and use
knob (E) to tilt table until it rests against table
stop bolt (F). Retighten lock handle.
2. Use a square (Figure 7-5) placed on table and
against blade to verify that table is 90 degrees
to blade.
3. If an adjustment is necessary, loosen lock
handle (D). Tilt table until it is square to blade;
then retighten lock handle.
4. Loosen lock nut (F
until it contacts table. Tighten lock nut to hold
table stop in place. When tightening the nut hold
the table stop bolt in place with a wrench to
prevent movement.
15
) and turn table stop bolt (F)
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5. If necessary, adjust pointer (G, Figure 15) to
zero.
Figure 7-5
7.5 Leveling table insert
Remove table insert to expose set screws in the
table ledge. Rotate screws as needed (2mm hex
key) until insert sits flush with table surface.
7.6 Installing/changing blades
Wear gloves when handling
blades. New blades are usually packaged in
coiled position; to prevent injury uncoil them
slowly and carefully while wearing work gloves
and safety glasses.
(If the teeth will not point down, no matter how
you orient blade, then blade is inside-out. Twist
it into correct position and re-install it.)
Figure 7-6
See sect. 4.0 for specific blade sizes for your model
Band Saw.
Refer to Figures 7-6, 7-7 and 7-8.
1. Disconnect machine from power source.
2. Loosen handle and remove it from table (see
HP6, Figure 5-3).
3. Adjust upper and lower blade guides away from
blade (see sections 7.11 through 7.13).
4. Move quick tension lever to “Full Release
(Blade Change)” position.
5. Open upper and lower doors by rotating door
knobs.
6. Pivot guide post cover out of the way (Figure 7-
6).
7. Swing lower guard (H, Figure 7-7) to the left. Tilt
table slightly if more clearance is needed to
swing guard.
8. Remove dust block (J, Figure 7-8).
9. Carefully remove blade from top wheel, then
from between upper and lower blade guides
and lower wheel. Slide blade out through slot in
table.
10. Guide new blade through table slot. Place blade
loosely in upper and lower blade guides. Make
sure blade teeth point down toward table, and
toward front of saw.
Figure 7-7
Figure 7-8
11. Position blade at center of upper and lower
wheels.
13. Before operating band saw, the new blade must
be tensioned and tracked, in that order. Find
instructions for tensioning and tracking the
blade in sections 7.7 and 7.9.
14. The blade guides must also be set properly
according to instructions in sections 7.11 through 7.13.
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7.7 Blade tension
7.8 Adjusting blade tension lever
Blade tension is set with the blade tension
handwheel (L, Figure 7-10) and is performed
following blade replacement and periodically as the
blade stretches from use.
Disconnect machine from
power source before making any adjustments.
Refer to Figures 7-9 and 7-10.
1. Place tension lever (K, Figure 7-9) in Full Tension position.
2. Set blade tension by rotating handwheel (L)
according to the arrow directions shown in
Figure 7-10, clockwise to tighten,
counterclockwise to loosen.
3. The gauge (M) indicates approximate tension
according to the width of the blade in inches.
Initially, set the blade tension to correspond to
the width of your blade.
As you become familiar with the saw, you may find
it necessary to change the blade tension from the
initial setting.
Keep in mind that too little or too much blade tension
can cause blade breakage and/or poor cutting
performance.
The blade tension lever has an adjustment screw or
stop bushing that allows you to adjust how much
tension is released when lever is used.
To adjust tension lever:
1. Disconnect machine from power source.
2. Move lever to Blade Release position and
remove blade.
3. Move tension lever to Full Tension position.
4. Models JWBS-15 and JWBS-18: Turn adjust-
ment screw (Figure 7-11) until gap between
screw and wheel shaft hinge is 1/8 to 3/16 in.
Model JWBS-20: Move stop bushing (Figure 7-
12) until gap between stop bushing and wheel
shaft hinge is 1/8 to 3/16 in.
Tip: When the band saw is not being used, place
tension lever to Partial Tension position – this will
prolong the blade’s life.
Figure 7-9
Figure 7-10
Figure 7-11
Figure 7-12
7.9 Blade tracking
Refer to Figures 7-13 and 7-14.
After proper tensioning, the blade must be tracked.
“Tracking” refers to position of blade on the wheels
while machine is in operation. Tracking should be
checked periodically, and is mandatory after every
blade change. Blade tracking is done by hand with
machine disconnected from power.
1. Disconnect machine from power source.
2. Blade must be correctly tensioned (sect. 7.7).
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3. Make sure blade guides and other parts of
machine will not interfere with blade movement.
Use handwheel (N) to lower guide post until you
can see blade t hrough tracking window (O,
Figure 7-13).
time to observe blade in action through tracking
window.
11. If further adjustments are needed, disconnect
from power and repeat above procedure.
4. Set blade tension lever initially to Partial
Tension-Idle/Tracking position.
Figure 7-13
5. Open upper door to expose wheel.
6. Rotate wheel by hand, observing position of
blade through tracking window. As you rotate
wheel, move tension lever to Full Tension
position. The blade should continue to ride upon
center of tire (Figure 7-14).
7.10 Overview – bearing adjustments
Thrust (back support) bearings are located behind
saw blade and provide support to back of blade
when saw is in operation.
Guide bearings are located on either side of saw
blade and provide stability for the blade when saw
is in operation. These bearings rotate on an
eccentric shaft so distance from blade can be
adjusted for optimal performance.
7.11 Upper blade guides
Unplug machine from power
source before making any adjustments! Blade
teeth are sharp – use care w hen working near
blade. Failure to comply may cause serious
injury.
The bearing guides should be set so that contact
between blade and guides will occur only when
blade is under pressure from a workpiece. To adjust
upper bearing guides for proper blade control,
proceed as follows.
Refer to Figures 7-15 and 7-16.
1. Disconnect machine from power source.
Figure 7-14
7. If blade tends to move toward edge of wheel,
set lever to Partial Tension-Idle/Tracking.
8. Loosen locking handle (P, Figure 7-13) and
slightly rotate tracking knob (R) with your right
hand while continuing to rotate wheel with your
left. Observe blade through tracking window.
Rotating knob clockwise will cause blade to
move toward rear edge of wheel. Rotating knob
counterclockwise will cause blade to move
toward front edge of wheel.
IMPORTANT: This adjustment is sensitive;
perform in small increments and give blade time
to react to changes.
9. When blade is tracking in center of wheel, retighten locking handle (P), and close upper
door.
2. Blade must already be tensioned and tracking
correctly. Place tension handle in Full Tension
position.
3. Lower guide post until upper guide bearings are
a few inches off table. (The reason for this will
be evident later in sect. 7.15)
4. Loosen lock knob (A, Figure 7-15).
Figure 7-15
10. Move tension lever to Full Tension position, and
connect band saw to power. Turn it on for a brief
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Page 19
Figure 7-16
5. Slide entire guide bracket until front of guide
bearings are about 0.015” (1/64”) behind the
blade’s gullet (curved area at base of tooth).
See Figure 7-17.
Figure 7-17
6. Tighten lock knob (A) to secure this position.
7. Loosen lock knob (B) for either of the front guide
bearings.
8. The guide bearing rotates on an eccentric shaft.
Adjust guide bearing by rotating the knurled
knob (C) until guide bearing is approximately
0.004” from blade. A quick way to achieve this
spacing is by placing a single thickness of a
crisp dollar bill (a dollar bill is approximately
0.004” thick) between blade and guide bearing.
Adjust guide bearing until it just lightly grips the
dollar bill.
NOTE: Do not force guide bearing against side
of blade. It should generally only make contact
with blade when there is pressure from the
cutting operation.
9. Tighten lock knob (B).
1. Loosen lock knob (D) and slide thrust bearing
up to back of blade.
2. Adjust thrust bearing until space between
groove bottom and back edge of blade is
approximately 0.015” (1/64”). Tighten lock knob
(D).
3. If lateral adjustment of bearing is needed to
align groove with blade, loosen set screw (E) at
front of bearing assembly, and shift bearing as
needed. Retighten set screw.
4. Make sure all lock knobs on upper guide
bearing assembly are tightened when
adjustments are finished.
7.13 Lower blade guides
Unplug machine from power
source before making any adjustments! Blade
teeth are sharp - use care when working near
saw blade. Failure to comply may cause serious
injury.
Refer to Figures 7-18 and 7-19.
1. Disconnect band saw from power source.
2. Open lower door and swing lower guard out of
the way.
3. Adjust lower guide bearings and lower thrust
bearing below table in similar manner to that of
upper guide and thrust bearings.
4. Movement summary: Loosen lock knob (F) to
move entire guide bearing assembly. Loosen
lock knob (G) and rotate knob (H) to adjust
guide bearing in relation to blade. Thrust
bearing is controlled by locking knob (J) and
lateral adjustment by set screw (K).
5. Make sure all knobs and handles are tightened
after adjustments are complete.
10. Repeat process for opposite guide bearing.
7.12 Upper thrust bearing
Refer to Figures 7-15 and 7-16.
The thrust bearing prevents backward deflection of
blade during cutting. A groove in the bearing surface
helps stabilize the moving blade.
Figure 7-18
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Page 20
Figure 7-19
7.14 Guide post
Refer to Figure 7-20.
1. Disconnect band saw from power source.
2. Loosen lock knob (L) and raise or lower guide
post using handwheel (M).
7.11). Also, the table must be square with blade
(see sect. 7.4).
4. Loosen lock knob (L, Figure 7-20) and raise
guide post to a high position.
5. Confirm that guide post travels straight up and
down, and guide bearings maintain their
relationship to blade.
6. If guide post does not go straight up and down
(blade begins deflecting when guide post is
raised), slightly loosen the screws (O) and turn
any of the set screws (P) as needed to bring
guide post into line.
7. When finished adjusting, securely tighten the
four screws (O).
8. Verify the setting by raising and lowering guide
post.
7.16 Changing blade speed
Disconnect machine from
power source before making any adjustments.
The JWBS-18 and JWBS-20 band saws have two
blade-speed options which is determined by the
position of the pulley drive belt. Refer to sect. 4.0 for
speed specifications.
1. Loosen lock handle (A, Figure 7-21).
Figure 7-20
3. Position blade guide assembly so that bottom of
guide bearings are about 1/8” above material to
be cut. Or, simply lower guide post until scale
pointer (N) indicates height of your workpiece.
This provides minimal clearance between
workpiece and bottom of guide bearings, which
will minimize blade deflection as well as
enhance operator safety.
4. Tighten lock knob (L).
7.15 Guide post parallelism
The guide post should be parallel to blade
throughout vertical travel of the guide post; thus the
guide bearings will maintain their relationship to
blade at any height from the table and won’t require
re-setting each time guide post is moved. This
setting has been accurately made by the
manufacturer and should not require immediate
attention, but may be checked in future as follows:
1. Disconnect band saw from power source.
2. Move blade tension lever to Full Tension
position.
3. The guide bearings in low position should
already be set in relation to blade (see sect.
Figure 7-21
2. Release belt tension by pulling handle (B) up,
then tighten lock handle (A) to maintain raised
position.
3. Open lower wheel door.
4. Refer to Figure 7-22:
For higher blade-speed – place poly V-belt in
inner position on spindle and motor pulleys as
shown.
For lower blade-speed – place poly V-belt in
outer position on pulleys.
After repositioning belt:
5. Loosen lock handle (A, Figure 7-21). Apply belt
tension by slightly pushing down handle (B).
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6. Tighten lock handle (A) to secure motor
position.
Figure 7-22
7.17 Drive belt replacement and
tensioning
The drive belt and pulleys are properly adjusted by
the manufacturer. However, belt tension should be
occasionally checked when the band saw is new, as
a new belt may stretch slightly during the breakingin process.
with moderate pressure on the belt halfway
between the pulleys. An adequately tensioned
belt will deflect about 1/2”. If tension isn’t strong
enough, push down on motor.
11. Tighten motor lock handle (A).
12. Install blade, and verify blade tension and
tracking before operating (sect 7.7 and 7.9).
7.18 Pulley alignment
Pulley alignment is done in conjunction with poly Vbelt replacement.
If you are just beginning the alignment, start with
sect. 7.17.
If you were directed here, proceed as follows:
1. Place a straight edge against wheel pulley and
motor pulley. If straight edge does not sit flush
against both pulleys, alignment is necessary.
If alignment is necessary:
2. Loosen two set screws on motor (lower) pulley
with 4mm hex wrench.
3. Adjust motor pulley by sliding in or out.
4. Confirm alignment of poly V-belt using the
straight edge.
5. Retighten the two set screws on the motor
pulley.
7.19 Brushes
Disconnect machine from
power source before making any adjustments.
If belt becomes worn, cracked, frayed or glazed, it
should be replaced as follows:
1. Disconnect machine from power source.
2. Open upper and lower doors and remove blade.
3. Loosen motor lock handle (A, Figure 7-21).
4. Raise motor lift handle (B) and retighten lock
handle (A) to hold motor in raised position.
5. Open lower wheel door. Remove bolt and
washers, and remove wheel. If lower wheel
does not come off easily you may need to use
a pulley puller to remove it.
6. Remove old belt from around motor pulley, and
then from around lower wheel pulley.
7. Install new belt, making sure it seats properly in
pulley grooves. Note: See sect. 7.16 for speed
positioning.
8. Check pulley alignment. Refer to sect. 7.18,
then return here to step 9.
9. Reinstall lower wheel, bolt and washers, and
tighten.
10. Loosen motor lock handle (A, Figure 7-21) and
allow motor to lower. Check tension by pushing
An adjustable brush is located in the lower wheel
housing. It should remain in constant contact with
blade and wheel to prevent buildup of gum and
debris. Loosen screw and adjust as needed, then
retighten screw.
8.0 Operating controls
8.1 Start/stop switch
Press the green on button (A, Figure 8-1) to start.
Press the red stop button (B) to stop.
Figure 8-1 – Start/Stop Switch
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On 3- and 5-horsepower models, the on button will
light up when it is pushed and saw is operating.
(There is no light on 1-3/4 HP models.)
The switch has a safety feature that prevents
unauthorized or accidental starting of the machine.
With band saw turned off, slide safety key (C, Figure
8-1) up and remove it from switch. This piece must
be re-inserted before band saw can operate.
9.0 Operation
The following section contains basic information,
and is not intended to cover all possible applications
or techniques using the band saw. Consult
published sources of information, acquire formal
training, and/or talk to experienced band saw users
to gain proficiency and knowledge of band saw
operations.
(The following figures may or may not show your
specific band saw, but procedures are the same.)
9.1 General procedure
1. Make sure the blade and upper and lower
bearings are properly adjusted for tension and
tracking.
2. Adjust blade guide assembly so that the guide
bearings are just above workpiece (about 3/16”)
allowing minimum exposure to blade. See
Figure 9-1.
3. If using the fence, move it into position and lock
it to the guide rail. If you are using the miter
gauge for a crosscut, the fence should be
moved safely out of the way.
4. Turn on band saw and allow a few seconds for
the machine to reach full speed.
Whenever possible, use a push
stick, hold-down, power feeder, jig, or similar
device while feeding stock, to prevent your
hands getting too close to the blade.
5. Place the straightest edge of the workpiece
against the fence, and push the workpiece
slowly into the blade. Do not force the
workpiece into the blade.
When cutting, do not overfeed
the blade; overfeeding will reduce blade life an d
may cause the blade to break.
6. When cutting long stock, the operator should
use roller stands, support tables, or an assistant
to help stabilize the workpiece.
Figure 9-1
9.2 Ripping
Ripping is cutting lengthwise through the workpiece,
and with the grain (of wood stock). See Figure 9-2.
Figure 9-2
9.3 Crosscutting
Crosscutting is cutting across the grain of the
workpiece, while using the miter gauge to feed the
workpiece into the blade.
Slide the bar of the miter gauge into the end of the
slot on the table.
The right hand should hold the workpiece steady
against the miter gauge, while the left hand pushes
the miter gauge past the blade, as shown in Figure
9-3.
Do not use the fence in conjunction with the miter
gauge. The offcut of the workpiece must not be
constrained during or after the cutting process.
Using the fence in conjunction
with the miter gauge can cause binding and
possible damage to the blade.
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Figure 9-3
9.4 Resawing
Resawing is the process of slicing stock to reduce
its thickness, or to produce boards that are thinner
than the original workpiece. Figure 9-4
demonstrates resawing.
The ideal blade for resawing is the widest one the
machine can handle, as the wider the blade the
better it can hold a straight line.
When resawing thin stock, use a push block, push
stick, or similar device to keep your hands away
from the blade.
Figure 9-5
9.6 Saw blade selection
Using the proper blade for the job will increase the
operating efficiency of your band saw, help reduce
necessary saw maintenance, and improve your
productivity. Thus, it is important to follow certain
guidelines when selecting a saw blade.
Here are factors to consider when selecting a blade:
The type of material you will be cutting.
The thickness of the workpiece or part.
The features of the workpiece or part, such
as bends or curves with small radii.
These factors are important because they involve
basic concepts of saw blade design. There are five
(5) blade features that are normally changed to meet
certain kinds of sawing requirements. They are:
1. width
2. pitch (number of teeth per inch)
3. tooth form (or shape)
4. the "set" of the teeth
5. the blade material itself.
Figure 9-4
9.5 Blade lead
Blade lead, or drift, is when the blade begins to
wander off the cutting line even when the band saw
fence is being used. Figure 9-5 shows an example
of blade lead. It is more common with small, narrow
blades, and is almost always attributable to poor
blade quality, or lack of proper adjustments. Inspect
the band saw for the following:
• Fence not parallel to miter slot and blade.
• Blade not tensioned correctly.
• Blade is dull.
• Teeth have excessive “set” on one side of
blade.
•Workpiece being fed too quickly.
9.7 Width
Band saw blades come in different standard widths,
measured from the back of the blade to the tip of the
tooth. Generally, wider blades are used for ripping
or making straight cuts; narrower blades are often
used when the part being cut has curves with small
radii. W hen cutting straight lines with a narrow
blade, the blade may have a tendency to wander,
causing blade lead. (refer to sect. 9.5).
9.8 Pitch
Pitch is measured in "teeth per inch" (TPI). Figure 96 shows blades with different pitches. A fine pitch
(more teeth per inch) will cut more slowly but
smoother. A coarse pitch (fewer teeth per inch) will
cut rougher but faster. As a rule of thumb, the thicker
the workpiece, the coarser will be the blade pitch. If
you have to cut a hard or very brittle material, you
will probably want to use a blade with a finer pitch in
order to get good clean cuts.
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General rule: Use a blade that will have no fewer
than 6 and no more than 12 teeth in the workpiece
at any given time.
Figure 9-6
9.9 Shape
Figure 9-7 shows common types of tooth shape.
Tooth shape has an effect on cutting rate, and with
few exceptions, the Skip and Hook types are used
to obtain higher feed rates when cutting thick
workpieces. Variable-tooth blades are also
available, which combine features of the other
styles.
Figure 9-7
9.10 Set
The term "set" refers to the way in which the saw
teeth are bent or positioned. Set patterns are usually
selected depending on the type of material that
needs to be cut. Three common set patterns are
shown in Figure 9-8.
Generally, the Raker set is used for cutting metal
workpieces; the Wave set, when the thickness of the
workpiece changes, such as cutting hollow tubing or
structurals. The Straight set is most often preferred
when cutting wood or plastics.
Figure 9-8
9.11 Material
Band saw blades can be made from different types
of materials. Some of the most common include
spring steel, carbon steel, carbon steel equipped
with a high speed or welded edge (bi-metal), or
carbide tips. A special type of saw blade is made
from "high speed steel"; these should not be used
on band saws with low rates of speed.
Because of the importance of blade selection, it is
recommended that you use the Blade Selection Guide in sect. 11.0.
9.12 Blade breakage
Band saw blades are subject to high stresses and
breakage may sometimes be unavoidable.
However, many factors can be controlled to help
prevent most blade breakage. Here are some
common causes for breakage:
1. Misalignment of blade guides
2. Feeding work too fast
3. Using a wide blade to cut a short radius curve
4. Excessive tension
5. Teeth are dull or improperly set
6. Upper guides are set too high off workpiece
7. Faulty weld on blade
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10.0 User-maintenance
Before any inter vention on the
machine, disconnect it from the electrical
supply by pulling out the plug. Failure to comply
may cause serious injury.
Clean band saw regularly to remove any resinous
deposits and sawdust.
Keep miter slot, and guide bearings, clean and free
of resin.
Keep blade clean and sharp. Check it periodically
for cracks or other signs of wear.
The drive belt should be checked periodically. If it
looks worn, frayed, glazed or otherwise damaged,
replace it.
Check that the cleaning brush over the band wheel
is working properly, and remove any deposits from
the band wheels to avoid vibration and blade
breakage.
Do not let saw dust build up in the upper and lower
wheel housings. Vacuum or blow out dust from
inside cabinet. (Use proper dust mask equipment).
The table surface must be kept clean and free of rust
for best results. If rust appears, it can often be
removed with a mixture of household ammonia,
good commercial detergent and #000 steel wool.
Alternatively, commercial rust removers can be
found at many hardware stores.
Apply a light coat of paste wax to the table surface.
Aerosol protectants are also available in major
hardware stores and supply catalogs. W hatever
method is chosen, the coating should protect the
metal and provide a smooth surface, without
staining workpieces.
If the power cord is worn, cut, or damaged in any
way, have it replaced immediately.
Connect the band saw to a JET dust collection
system of appropriate capacity.
Vacuum out the motor fan cover.
10.1 Lubrication points
1. Periodically apply a light, non-hardening grease
to rack and pinion system of guide post.
2. Grease sliding surfaces of the table trunnions.
3. Oil any pins, shafts, and joints. (Do not get oil
on pulleys or belts.)
4. Clean and oil the tensioning mechanism if it
becomes difficult to adjust.
Note: Bearings on the band saw are pre-lubricated
and sealed, and do not require attention.
10.2 Additional servicing
Any other servicing should be performed by an
authorized service representative.
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11.0 Blade Selection Guide
Table 3
Identify the material and thickness of your workpiece. The chart will show the recommended PITCH, blade TYPE,
and FEED RATE.
Key: H – Hook L – Low
S – Skip M – Medium
R – Regular H – High
Example: 10/H/M means 10 teeth per inch / Hook Type Blade / Medium Feed
Workpiece Thickness
Material/s
1/2" 1" 3" 6+"
Hardwood 10/R/L 8/R/L 3/H/M 3/H/M
Woods
Softwood 10/R/L 8/R/L 3/H/M 3/H/M
Carbon 10/R/L 6/R/L 3/S/M 3/S/M
NonMetals
Plastics
Mica 32/R/L -- -- --
Asbestos 8/R/L 6/R/L 3/S/M 3/S/M
Hard Rubber 10/R/L 8/R/L 6/R/M 2/S/H
Formica 14/R/M 10/R/M 4/H/H 4/H/H
Masonite 10/R/L 4/S/L 3/S/M 3/H/M
Micarta 14/R/M 10/R/M 4/H/H 3/H/H
Plexiglas 10/R/L 6/R/L 3/S/M 3/S/M
Paper 14/R/L 10/R/L 4/S/L 3/S/M
Study the part drawing or prototype, or actually
measure the smallest cutting radius required, and
locate this radius (in inches) on the chart at the right.
Follow the curve to where the approximate blade
width is specified. If a radius falls between two of the
curves, select the widest blade that will saw this
radius.
This procedure should be used for making initial
blade selections. These recommendations can, of
course, be adjusted to meet specific requirements
of a cutting job. Compromises may be necessary if
you cannot find all needed specifications in a single
blade.
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12.0 Troubleshooting JWBS-series Band Saws
12.1 Operational problems
Table 4
Symptom Probable Cause Correction *
Table tilt does not hold
position under load.
Table will not tilt. Trunnion not lubricated. Lubricate trunnion.
Table vibration while
sawing.
Surface finish on
workpiece is rough.
Blade cutting
inaccurately. Cuts not
straight.
Blade cannot be
tensioned properly.
Blade binds in
workpiece.
Lock handle not tight. Tighten lock handle.
Trunnion locking mechanism is broken
or worn.
Trunnion jammed. Disassemble and replace jammed parts.
Drive belt too slack. Increase tension on drive belt. Replace
Incorrect choice of saw blade pitch. Check blade selection chart and use
Saw dust or debris on band wheel. Or
tire is worn/damaged.
Blade pitch too coarse. Change to finer pitch blade.
Workpiece being fed too strongly. Reduce feed force.
Gum or pitch on blade. Clean blade.
Worn blade teeth or damaged blade. Replace blade.
Fence not parallel to blade. Align fence properly.
Incorrect adjustment of blade guides. Adjust blade guides properly.
Workpiece being fed too strongly. Reduce feed force.
Upper blade guides not located close
enough to workpiece.
Incorrect choice of saw blade for that
particular operation.
Blade tension too light. Increase tension.
Tension spring is fatigued. Replace tension spring (contact JET
Incorrect blade tension or damaged
blade.
Blade too wide for desired radius. Select narrower blade.
Replace trunnion locking mechanism.
belt if worn.
correct blade.
Keep band wheels clean. Replace tires if
necessary.
Position guides about 1/8” above
workpiece.
Install correct blade.
service representative).
Correct accordingly.
Blade forms cracks at
base of teeth.
Cracks on back edge
of blade.
Teeth not suitable for operation, or
incorrectly set.
Blade thickness not suitable for band
wheel diameter.
Blade sharpened incorrectly, becomes
overheated.
Band wheels have become misaligned. Contact service representative.
Workpiece being fed too quickly.
Welding on blade not perfectly aligned.
Thrust bearing is worn; caused by
constant contact with back of blade.
Replace with proper blade.
Replace with proper thickness blade.
Sharpen blade properly or replace.
Reduce feed speed to lessen strain on
blade.
Eliminate welded part, and re-weld
properly; or acquire a new blade. Round
the back edge of a new blade.
Replace thrust bearing. Adjust new
bearing according to instructions.
27
Page 28
Symptom Probable Cause Correction *
Blade breaks
prematurely.
Blade breaks close to
weld.
Premature dulling of
saw teeth.
Feed force too great. Reduce feed force.
Blade pitch too coarse.
Guide bearings not properly supporting
blade.
Blade tensioned too tightly. Reduce tension.
Blade overheated during welding.
Blade cooled too rapidly after welding.
Blade pitch too fine.
Feed pressure too light. Increase feed pressure.
Cutting rate too low. Increase feed pressure and cutting rate.
Incorrect choice of blade.
Chipped tooth or foreign object lodged in
cut.
Refer to blade selection chart; use finer
pitch blade.
Check guide bearings for correct
position and signs of wear. Adjust or
replace as needed.
Have blade annealed, or eliminate brittle
part and weld correctly.
Have blade annealed, or eliminate brittle
part and weld correctly.
Refer to blade selection chart. Use blade
with coarser pitch.
Re-examine material. Select proper
blade from chart.
Stop saw and remove lodged particle.
Replace blade if damaged.
* WARNING: Some corrections may require a qualified electrician.
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12.2 Mechanical and electrical problems
Table 5
Symptom Probable Cause Correction *
Machine will not
start/restart or
repeatedly trips circuit
breaker or blows
fuses.
Band Saw does not
attain full speed.
* WARNING: Some corrections may require a qualified electrician.
No incoming power. Verify machine connections.
Cord damaged. Replace cord.
One cause of overloading trips which are
not electrical in nature is too heavy a cut.
Band Saw frequently trips.
Building circuit breaker trips or fuse
blows.
Overload automatic reset has not reset.
Switch or motor failure (how to
distinguish).
Motor overheated.
Motor failure.
Miswiring of unit.
Switch failure.
Extension cord too light or too long.
Low current. Contact a qualified electrician.
The solution is to reduce feed pressure
into the blade. If this does not resolve the
issue, check for loose electrical lead.
Verify that band saw is on a circuit of
correct size. If circuit size is correct,
there is probably a loose electrical lead.
Check amp setting on motor starter.
When the 3HP and 5HP Band Saw
overloads on the circuit break built into
the motor starter, it takes time for the
machine to cool down before restart.
Allow machine to adequately cool before
attempting restart. If problem persists,
check amp setting on the motor starter
inside the electrical box.
If you have access to a voltmeter, you
can separate a starter failure from a
motor failure by first, verifying incoming
voltage at 115 +/-10% (or 230+/-10%)
and second, checking the voltage
between starter and motor at 115 +/-10%
(or 230+/-10%). If incoming voltage is
incorrect, you have a power supply
problem. If voltage between starter and
motor is incorrect, you have a starter
problem. If voltage between starter and
motor is correct, you have a motor
problem.
Clean motor of dust or debris to allow
proper air circulation. Allow motor to cool
down before restarting.
If electric motor is suspect, you have two
options: Have a qualified electrician test
the motor for function or remove the
motor and take it to a qualified electric
motor repair shop for testing.
Double check to confirm all electrical
connections are correct. Refer to wiring
diagram to make needed corrections.
If the start/stop switch is suspect, you
have two options: Have a qualified
electrician test the switch for function, or
purchase a new start/stop sw itch and
establish if that was the problem on
change-out.
Replace with adequate size and length
cord.
29
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13.0 Replacement Parts
Replacement parts are listed on the following pages. To order parts or reach our service department, call 1-800274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Having the Model Number and Serial Number of
your machine available when you call will allow us to serve you quickly and accurately.
30
Page 31
13.1.1 JWBS-15 Assembly – Exploded View
31
Page 32
32 33
Page 33
13.1.2 JWBS-15 Assembly – Parts List
Index No. Part No. Description Size Qty
1 ................ PM1500-004.............. Lifting Ring ............................................................... M10 ............................... 1
2 ................ JWBS15-102 ............. Machine Main Body Frame ...................................... ...................................... 1
3 ................ TS-1482021 .............. Hex Cap Bolt............................................................ M6x12 ........................... 1
4 ................ JWBS15-104 ............. Power Cord .............................................................. 1-3/4HP ......................... 1
.................. JWBS15-104B........... Power Cord .............................................................. 3HP ............................... 1
15 .............. PM1800B-059-017 .... C one Spring ............................................................. ...................................... 1
3 ................ 6286478 .................... E Ring ...................................................................... S12................................ 2
9 ................ PM1800B-059-017 .... C one Spring ............................................................. ...................................... 1
10 .............. JWBS15-1138-332 .... Spring ...................................................................... ...................................... 1
8 ................ TS-1523011 .............. Set Screw ................................................................ M6x6 ............................. 2
9 ................ PM1500-085-29 ........ S Ring ...................................................................... S8.................................. 1
17 .............. PM1800B-059-017 .... C one Spring ............................................................. ...................................... 4
15 .............. PM1800B-059-017 .... C one Spring ............................................................. ...................................... 1
13 .............. PM1800B-027-026 .... E Ring ...................................................................... E15................................ 1
14.1 Connections for 1.75HP (models 714600, 714700)
G
WHITE
BLACK
GREEN
Rewired to 115V
230V 1PH115V 1PH
PUSH BUTTON SWITCH
(viewed from behind)
G
GREEN
WHITE
BLACK
BLACK
WHITE
START
STOP
GROUND
GREEN
GREEN
BLACK
WHITE
START
CAPACITOR
300MFD
250VAC
RUN
CAPACITOR
40uF
250VAC
RED
WHITE
RED
RED
MOTOR at 230V 1PH
GREEN
WHITE
BLACK
14
RED
GRAY
3
2
GROUND
GREEN
WHITE
BLACK
3
2
4
1
GROUND
MOTOR at 115V 1PH
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Page 63
14.2 Connections for 3HP (models 714650, 714750, 714800)
1~ 230V
POWER CORD
6-15P
MAGNETIC
SWITCH
ASSEMBLY
CONTROL PANEL
WHITE
BLACK
BLACK
BLACK
SR
WHITE
RED
WHITE
YELLOW
BLACK
230V
YELLOW
BLACK
RED
RED
RED
RED
RED
START
CAPACITOR
300MFD
250VAC
RUN
CAPACITOR
60uF
300VAC
GREENGREEN
Set at 12A
BLACK
UV
WHITE
GREEN
GROUND
VU
BLACK
WHITE
BLACK
BLACK
63
Page 64
14.3 Connections for 5HP (model 714850)
BLACK
WHITE
GROUND
RS
BLACK
GREEN
WHITE
GREEN
MAGNETIC
SWITCH
ASSEMBLY
WHITE
BLACK
BLACK
BLACK
SR
WHITE
GROUND
GREEN
POWER
SUPPLY
JUNCTION
BLOCK
1~ 230V
CONTROL PANEL
RED
WHITE
YELLOW
BLACK
230V
YELLOW
BLACK
BLUE
BLUE
RED
RED
RED
START
CAPACITOR
300MFD
250VAC
RUN
CAPACITOR
45uF
450VAC
Set at 22A
GREENGREEN
UV
BLACK
GROUND
WHITE
GREEN
VU
BLACK
WHITE
RED
RED
BLACK
BLACK
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15.0 Warranty and service
JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please
contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday.
Warranty Period
The general warranty lasts for the time period specified in the literature included with your product or on the official
JET branded website.
• JET products carry a limited warranty which varies in duration based upon the product. (See chart below)
• Accessories carry a limited warranty of one year from the date of receipt.
• Consumable items are defined as expendable parts or accessories expected to become inoperable within a
reasonable amount of use and are covered by a 90 day limited warranty against manufacturer’s defects.
Who is Covered
This warranty covers only the initial purchaser of the product from the date of delivery.
What is Co vered
This warranty covers any defects in workmanship or materials subject to the limitations stated below. This warranty
does not cover failures due directly or indirectly to misuse, abuse, negligence or accidents, normal wear-and-tear,
improper repair, alterations or lack of maintenance. JET woodworking machinery is designed to be used with Wood.
Use of these machines in the processing of metal, plastics, or other materials outside recommended guidelines may
void the warranty. The exceptions are acrylics and other natural items that are made specifically for wood turning.
Warranty Limitations
Woodworking products with a Five Year Warranty that are used for commercial or industrial purposes default to a
Two Year Warranty. Please contact Technical Service at 1-800-274-6846 for further clarification.
How to Get Technical Support
Please contact Technical Service by calling 1-800-274-6846. Please note that you will be asked to provide proof
of initia l p u rch a s e whe n calling. If a product requires further inspection, the Technical Service representative will
explain and assist with any additional action needed. JET has Authorized Service Centers located throughout the
United States. For the name of an Authorized Service Center in your area call 1-800-274-6846 or use the Service
Center Locator on the JET website.
More Information
JET is constantly adding new products. For complete, up-to-date product information, check with your local distributor
or visit the JET website.
How State Law Appli es
This warranty gives you specific legal rights, subject to applicable state law.
Limitations on This Warranty
JET LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY FOR EACH PRODUCT.
EXCEPT AS STATED HEREIN, ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN
IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
JET SHALL IN NO EVENT BE LIABLE FOR DEATH, INJURIES TO PERSONS OR PROPERTY, OR FOR
INCIDENTAL, CONTINGENT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF OUR
PRODUCTS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
JET sells through distributors only. The specifications listed in JET printed materials and on official JET website are
given as general information and are not binding. JET reserves the right to effect at any time, without prior notice,
those alterations to parts, fittings, and accessory equipment which they may deem necessary for any reason
whatsoever. JET
Product Listing with Warranty Period
90 Days – Parts; Consumable items
1 Year – Motors; Machine Accessories
2 Year – Metalworking Machinery; Electric Hoists, Electric Hoist Accessories; Woodworking Machinery used
for industrial or commercial purposes
5 Year – Woodworking Machinery
Limited Lifetime – JET Parallel clamps; VOLT Series Electric Hoists; Manual Hoists; Manual Hoist
Accessories; Shop Tools; Warehouse & Dock products; Hand Tools; Air Tools
NOTE: JET is a division of JPW Industries, Inc. References in this document to JET also apply to JPW Industries, Inc.,
or any of its successors in interest to the JET brand.
®
branded products are not sold in Canada by JPW Industries, Inc.
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427 New Sanford Road
LaVergne, Tennessee 37086
Phone: 800-274-6848
www.jettools.com
68
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