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Operating Instructions and Parts Manual
Industrial Bench Grinder with Multitool
Model IBGM-8
JET
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-577208
Ph.: 800-274-6848 Edition 2 01/2018
www.jettools.com Copyright © 2018 JET
1.0 IMPORTANT SAFETY
INSTRUCTIONS
WARNING – To reduce risk of injury:
1. Read and understand the 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 machine 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 bench grinder, do not use
until proper training and knowledge have been
obtained.
5. Do not use this machine 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 protective eye wear when
operating machinery. Eye wear shall be impact
resistant, protective safety glasses with side
shields which comply with ANSI Z87.1
specifications. Use of eye wear which does not
comply with ANSI Z87.1 specifications could
result in severe injury from breakage of eye
protection. (Everyday eyeglasses only have
impact resistant lenses; they are NOT safety
glasses.) Use the grinder’s eye shields and
spark guards. Also use face or dust mask if
cutting operation is dusty.
7. Wear proper apparel. Do not wear loose
clothing, neckties, rings, bracelets, or other
jewelry which may get caught in moving parts.
Non-slip footwear is recommended. Wear
protective hair covering to contain long hair.
8. Wear protective clothing such as apron or
safety shoes, where the grinding activity
presents a hazard to the operator.
9. Wear ear protectors (plugs or muffs) if sound
exceeds safe levels.
10. CALIFORNIA PROPOSITION 65 WARNING:
This product contains chemicals known to the
State of California to cause cancer, or birth
defects or other reproductive harm.
11. This product, when used for welding, cutting,
or working with metal, produces fumes, gases,
or dusts which contain chemicals known to the
State of California to cause birth defects and,
in some cases, cancer. (California Health and
Safety Code Section 25249.5 et seq.)
12. Do not operate this machine while tired or
under the influence of drugs, alcohol or any
medication.
13. Make certain the switch is in the OFF position
before connecting the machine to the power
supply.
14. Make certain the machine is properly
grounded.
15. Make all machine adjustments or maintenance
with the machine unplugged from the power
source.
16. 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.
17. Keep safety guards in place at all times when
the machine is in use. If removed for
maintenance purposes, use extreme caution
and replace the guards immediately after
completion of maintenance.
18. Check damaged parts. Before further use of
the 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.
19. Provide for adequate space surrounding work
area and non-glare, overhead lighting.
20. Keep the floor around the machine clean and
free of scrap material, oil and grease.
21. Keep visitors a safe distance from the work
area. Keep children away.
22. Make your workshop child proof with padlocks,
master switches or by removing starter keys.
23. Give your work undivided attention. Looking
around, carrying on a conversation and “horseplay” are careless acts that can result in
serious injury.
24. Keep proper footing and balance at all times
so that you do not fall into or lean against the
grinding wheel, belt, or other moving parts. Do
not overreach or use excessive force to
perform any machine operation.
25. Disconnect grinder before servicing and before
changing wheel, disc, or belt.
2
26. Use recommended accessories. The use of
improper accessories may cause risk of injury
to persons.
27. Turn off the machine before cleaning. Use a
brush to remove chips or debris — do not use
bare hands.
28. Never leave the grinder running unattended.
Turn power off and do not leave machine until
wheels come to a complete stop.
29. Remove loose items and unnecessary work
pieces from the area before starting the
grinder.
30. Don’t use in dangerous environment. Don’t
use power tools in damp or wet location, or
expose them to rain. Don’t use this grinder in a
flammable environment. Keep work area well
lighted.
31. Keep work area clean. Cluttered areas and
benches invite accidents.
32. Use right tool. Don't force tool or attachment to
do a job for which it was not designed.
33. 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. Sect. 6.2, Table 2 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.
34. Maintain tools with care. Keep tools sharp and
clean for best and safest performance. Follow
instructions for lubricating and changing
accessories.
35. Never stand on tool. Serious injury could occur
if the tool is tipped or if the cutting tool is
unintentionally contacted.
36. Direction of feed. Feed work into a blade or
cutter against the direction of rotation of the
blade or cutter only.
37. Do not overtighten wheel nut.
38. Frequently clean grinding dust from around
and beneath grinder.
39. Use grinding wheel suitable for speed of
grinder.
40. Inspect abrasive wheels for cracks or other
forms of damage. Perform a “ring test” to
check wheel integrity. Do not use a faulty or
damaged wheel.
41. Verify that maximum RPM of abrasive wheel is
compatible with speed of grinder. Do not
remove the blotter (label) from either side of a
grinding wheel.
42. Allow machine to reach full RPM before
starting the grinding operation.
43. Do not crowd the work so that the wheel or
abrasive disc slows.
44. Tool rest should be adjusted to approximately
1/16” from wheel surface.
45. Do not grind on the side of a wheel; do all work
on the grinding face or edge near the tool rest.
46. Do not grind aluminum or magnesium on the
grinding wheel, as these may pose a
fire/safety hazard.
47. Use only the flanges that are furnished with
the grinder.
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.
3
2.0 Table of contents
Section Page
1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2
2.0 Table of contents ............................................................................................................................................ 4
3.0 About this manual .......................................................................................................................................... 5
4.0 Specifications ................................................................................................................................................. 6
4.1 Mounting hole dimensions .......................................................................................................................... 7
5.0 Setup and assembly ....................................................................................................................................... 8
5.1 Unpacking .................................................................................................................................................. 8
5.2 Carton contents .......................................................................................................................................... 8
5.3 Tools required for assembly ....................................................................................................................... 8
5.4 Securing the grinder ................................................................................................................................... 8
5.5 Assembling eye shield bracket to spark guard ........................................................................................... 9
5.6 Installing spark guard/bracket .................................................................................................................... 9
5.7 Eye shield ................................................................................................................................................... 9
5.8 Tool rest ..................................................................................................................................................... 9
5.9 Dust port ..................................................................................................................................................... 9
5.10 Multitool position ....................................................................................................................................... 9
5.11 Installing/replacing abrasives ................................................................................................................. 10
6.0 Electrical connections .................................................................................................................................. 10
6.1 Grounding instructions ............................................................................................................................. 10
6.2 Extension cords ........................................................................................................................................ 11
6.3 Voltage conversion ................................................................................................................................... 11
7.0 Operation ..................................................................................................................................................... 11
7.1 On/Off Switch ........................................................................................................................................... 11
7.2 Precautions .............................................................................................................................................. 12
8.0 Adjustments ................................................................................................................................................. 12
8.1 Eye Shield Tilt Adjustment ....................................................................................................................... 12
8.2 Spark Guard ............................................................................................................................................. 12
8.3 Tool Rest .................................................................................................................................................. 12
8.4 Belt tracking .............................................................................................................................................. 12
8.5 Platen adjustment ..................................................................................................................................... 13
9.0 User-maintenance ........................................................................................................................................ 13
9.1 Ring Test .................................................................................................................................................. 13
9.2 Care of Grinding Wheels .......................................................................................................................... 13
9.3 Changing Wheels ..................................................................................................................................... 13
9.4 Wheel balancing ....................................................................................................................................... 14
9.5 Dressing the wheel ................................................................................................................................... 14
9.6 Wire wheel brushes .................................................................................................................................. 15
9.7 Cleaning ................................................................................................................................................... 15
9.8 Lubrication ................................................................................................................................................ 15
9.9 Additional servicing .................................................................................................................................. 15
10.0 Troubleshooting JIGM-8 Grinder with Multitool .......................................................................................... 16
11.0 Optional accessories .................................................................................................................................. 18
12.0 Replacement Parts ..................................................................................................................................... 18
12.1.1 JIGM-8 Grinder with Multitool – Exploded View .................................................................................. 19
12.1.2 JIGM-8 Grinder with Multitool – Parts List ........................................................................................... 20
13.0 Wiring Diagram for JIGM-8 Grinder with Multitool ...................................................................................... 21
14.0 Warranty and Service ................................................................................................................................. 22
4
3.0 About this manual
This manual is provided by JET, covering the safe operation and maintenance procedures for a JET IBGM-8
Industrial Grinder with Multitool attachment. This manual contains instructions on installation, safety
precautions, general operating procedures, maintenance instructions and parts breakdown. Your grinder has
been designed and constructed to provide consistent, long-term operation if used in accordance with the
instructions set forth in this document.
The operator is encouraged to familiarize himself/herself with ANSI B7.1 – Safety Requirements for Use, Care
and Protection of Abrasive Wheels.
If there are questions or comments, please contact your local supplier or JET. JET c an also be reached at our
web site: www.jettools.com.
Retain this manual for future reference. If the grinder transfers ownership, the manual should accompany it.
Read and unders tand the entire contents of this ma nual before attempting assembl y
or operation! Failure to comply may ca use serious injury!
Register your product using the mail-in card provided, or register online: www.jettools.com
5
4.0 Specifications
Table 1
Model number
Stock number 577208
Motor and Electricals
Motor type induction, capacitor start, centrifugal switch
Horsepower 1 HP
Phase single
Voltage 115/230V (prewired 115V)
Cycle 60 Hz
Listed FLA (full load amps) 11/5.5 A
Start capacitor 200MFD 125VAC
Run capacitor
Motor speed 3800 RPM
On/off switch paddle with safety key
Power transfer Direct drive
Power cord 16AWG 300V, 6 ft. (182cm)
Power plug installed 125V
Recommended circuit size 1 15A
Sound emission without load 2 75dB at 3ft.
Arbor and grinding wheel
Arbor diameter 5/8 in. (16mm)
Wheel size (dia. x width) 8 x 1 in. (16 x 25.4mm)
Wheel bore 5/8 in. (16mm)
Wheel grit, material 36 grit, aluminum oxide
Wheel gr it 36 G
Wheel flange diameter 3-3/8” (85mm)
Wheel speed 3800 RPM
Arbor nut max. tightening torque
Toolrest distance to wheel adjustable
Abrasive belt
Belt size 36 x 2 in. (915 x 51 mm)
Belt grit, material 100 grit, zirconia alumina
Belt speed 5000 SFPM
Contact wheel (p/n 577115) 3-1/2 Dia. x 2 in. (51 x 89 mm)
Platen size 2 x 6 in. (50.8 x 153 mm)
Grinding disc
Disc diameter 7 in. (178 mm)
Disc gri t, material 80 grit, zirconia alumina
Disc speed 3800 RPM
Main materials
Arbor steel
Base cast iron
Body cast iron
Inner wheel guard cast iron
Outer wheel guard aluminum
Wheel fl anges cast iron
Tool rest cast iron
Eye shield clear polycarbonate
Spark guard steel
Knob polymide
IBGM-8
35μF 250V
20 lbf-ft (270kgf-cm)
6
Dust/swarf collection
Dust port outside diameter 2-1/2 in. (63.5mm)
Recommended min. extraction volume 350 CFM
Dimensions
Mounting hole centers 8-1/2 in. (215mm)
Mounting hole diameters 7/16 in. (11mm)
Footprint, LxW 9-1/2 x 8 in.(241.6x206.6mm)
Assembled dimensions, LxWxH
(approx.)
Shipping dimensions, LxWxH 24-1/2 x 24-1/2 x 19 in. (622 x 622 x 483 mm)
Dust/swarf collection
Dust port outside diameter 2 in. (59mm)
Recommended minimum extraction volume 350 CFM
Weights
Net weight 64 lb (29.20 kg)
Shipping weight 70 lb (31.73 kg)
Horizontal position 17-3/4 x 18 x 10 in. (451 x 457 x 254 mm)
Vertical position 17-3/4 x 12 x 17-1/2 in. (451 x 305 x 445 mm)
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.
L = length, W = width, H = height SFPM = surface feet per minute
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 specifications at any time and without prior notice, without
incurring obligations.
4.1 Mounting hole dimensions
Figure 4-1: JIGM-8 hole centers
7
5.0 Setup and assembly
5.1 Unpacking
Separate all parts from the packing material. Check
each part against sect. 5.2, Carton contents, and
make certain that all items are accounted for.
(Check grinder first to verify if any parts have been
pre-mounted.) Notify your dealer or JET if parts are
missing or there is shipping damage. Do not
discard any packing material until grinder is
assembled and operating properly.
5.2 Carton contents
Refer to Figure 5-1.
1 Grinder with Multitool (not shown)
1 Spark guard (A)
2 Lock knob (B)
1 Flat washer, 1/4" (C)
1 Eye shield bracket (D)
2 Eye shield plate (E)
2 Hex cap screw, 3/8 x 3/4" (F)
2 Hex cap screw, 3/8 x 1/2" (G)
2 Truss head screw, 3/16 x 1/2” (H)
4 Flat washers 3/8” (J)
1 Eye shield (K)
1 Tool rest (L)
1 Wheel dresser (M)
1 Grinding belt (not shown)
1 Grinding disc (not shown)
Chipped or cracked wheels
can break up and cause serious damage to the
grinder and/or severe injury to the operator.
Regularly inspect wheels for damage.
5.3 Tools required for assembly
Cross-point (Phillips) screwdriver
14mm (or adjustable) wrench
The IBGM-8 Grinder with Multitool Attachment
requires only the assembly of the left-hand eye
shield and tool rest. Additional tools may be
needed for fastening the grinder to a workbench or
stand. For your safety, do not plug the grinder into
a power source until all assembly and adjustments
are complete.
Be sure that the bench grinder
is unplugged and the power switch is in the
OFF position. Do not plug in the grinder to
power until it is inspected for shipping damage
and fully assembled. Failure to comply may
cause serious injury.
Do not operate this grinder
without all guards and shields in place and in
working order. Failure to comply may cause
serious injury.
Figure 5-1: Carton contents
5.4 Securing the grinder
To prevent the grinder from moving during
operation, it should be securely mounted to a work
surface or grinder stand. Fasteners for mounting
are not included with the grinder.
1. Align the mounting holes on the grinder with
predrilled holes in a bench or grinder stand.
Figure 4-1 shows hole centers for mounting.
2. Insert M8 (or 5/16”) bolts through the holes
and tighten, using washers and nuts.
An optional pedestal stand (not included) is
available from JET for your grinder. See sect. 11.0.
8
5.5 Assembling eye shield bracket to
spark guard
Refer to Figure 5-2.
Note: Spark guard (A) and eye shield bracket (D)
are marked L for left side assembly. Assemble the
spark guard and eye shield bracket using Figure 52 as a guide.
Figure 5-2: bracket to spark guard
5.6 Installing spark guard/bracket
Refer to Figure 5-3.
1. Install spark guard and mounting bracket
assembly to the left wheel housing with two
3/8 x 1/2” hex cap screws (G) and two 3/8" flat
washers (J).
2. The spark guard (A
within 1/16" of the grinding wheel surface or
other accessory being used. As the wheel
wears down, the spark guard must be readjusted to maintain this 1/16" distance.
) should be adjusted to
1
5.7 Eye shield
Refer to Figure 5-3.
1. Insert two 3/16” x 1/2” truss head screws (H)
through bracket, eye shield (K), and plate (E)
which contains threaded mounting holes.
2. Tighten screws (H).
dust port, using a 2-in. diameter hose with hose
clamp (not provided).
Figure 5-3: guard and tool rest
5.10 Multitool position
The Multitool attachment is pre-installed in
horizontal position. It can be removed and
positioned in vertical orientation as follows.
1. Remove nut (R, Figure 5-4) and slide drive
pulley (S) off shaft.
2. Remove 3 screws and washers (T) and rotate
adaptor plate (U) to vertical position.
3. Reinstall screws and washers, drive pulley and
nut.
5.8 Tool rest
Refer to Figure 5-3.
1. Install tool rest (M) by inserting two 3/8" x 3/4"
hex cap screws (F) through two 3/8" flat
washers (J), through the tool rest (M), into the
wheel housing.
2. The tool rest should be adjusted to within 1/16"
of the grinding wheel or other accessories
being used. As the wheel wears down, the tool
rest must be readjusted to maintain a
maximum 1/16" clearance.
5.9 Dust port
It is recommended that a metalworking dust
collection system be connected to the grinder’s
Figure 5-4: Multitool orientation
9
5.11 Installing/replacing abrasives
See Figure 5-5.
Disc: Clean disc surface of aluminum drive wheel.
If replacing an abrasive, clean old adhesive from
drive wheel with a solvent. Peel off backing and
apply new abrasive (A), centering it on drive wheel.
Belt: Push contact wheel backward (B) and
engage catch (C) to lock in place. Install belt,
making sure directional arrows printed on back of
belt match direction of belt movement. Pull catch
(C) upward to tension belt.
If belt has a lap joint, make sure belt is oriented
according to Figure 5-5, inset.
Figure 5-5: installing abrasives
Figure 6-1: plug configurations
6.1 Grounding instructions
1. All Grounded, Cord-connected Tools:
This tool 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 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 equipmentgrounding conductor to a live terminal.
6.0 Electrical connections
Electrical connections should
be made by a qualified electrician in
compliance with all relevant codes. This tool
must be properly grounded.
The IBGM-8 Grinder with Multi Tool is prewired for
115V power, and is supplied with a plug designed
for use on a circuit with a grounded outlet that
looks like the one pictured in A, Figure 6-1. The
grinder may be converted to 230V power, see sect.
7.3.
Before connecting to power source, be sure switch
is in off position.
It is recommended that the grinder be connected to
a 15 amp circuit with circuit breaker or time-delay
fuse marked “D”. Local codes take precedence
over recommendations.
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.
2. Grounded, cord-connected tools intended for
use on a supply circuit having a nominal rating less
than 150 volts:
This tool is intended for use on a circuit that has an
outlet that looks like the one illustrated in A, Figure
6-1. An adapter, shown in B and C, may be used to
connect this plug to a 2-pole receptacle as shown
in B if a properly grounded outlet is not available.
The temporary adapter should be used only until a
properly grounded outlet can be installed by a
qualified electrician. This adapter is not permitted
10
in Canada. The green-colored rigid ear, lug, and
the like, extending from the adapter must be
connected to a permanent ground such as a
properly grounded outlet box.
3. Grounded, cord-connected tools intended for
use on a supply circuit having a nominal rating
between 150 - 250 volts, inclusive:
This tool is intended for use on a circuit that has an
outlet that looks like the one illustrated in D, Figure
6-1. A grounding plug may be installed, that looks
like the plug illustrated in D; or the grinder may be
“hard-wired” to a panel, provided there is a
disconnect for the operator.
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.
3. Remove existing plug from grinder cord and
attach a UL/CSA listed plug designed for 230V
power.
7.0 Operation
A bench grinder is designed for hand-grinding
operations such as sharpening chisels,
screwdrivers, drill bits, removing excess metal, and
smoothing and polishing metal surfaces.
The IBGM-8 with Multitool attachment offers
multiple working methods:
• Grinding wheel – A 36-grit wheel is provided,
and is effective when a considerable amount
of metal must be removed, or when obtaining
a smooth finish is not important. A finer grain
abrasive grinding wheel (not provided) can be
mounted for sharpening tools or grinding to
close size tolerances because it removes
metal more gradually for precision grinding
and achieves a smoother finish.
6.2 Extension cords
The use of extension cords is discouraged. Try to
position equipment near the power source. If an
extension cord becomes necessary, use only
three-wire extension cords that have three-prong
grounding type plugs and three-prong receptacles
that accept the tool's plug. Replace or repair
damaged or worn cord immediately.
Make sure your extension cord is good condition,
and is 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 2 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 (AWG), the heavier the cord.
Ampere
Rating
More
Than
Not
More
Than
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12
Volts
120
240
AWG
Total length of
cord in feet
25
50
100
50
100
200
Not
Recommended
150
300
Extension Cord Recommendations
Table 2
6.3 Voltage conversion
To change voltage input to 230V:
1. Turn grinder over and remove base plate.
2. Rewire the leads according to the diagram in
sect. 13.0.
• Disc grinding – Versatile function, such as
dressing small castings and sharpening cutters
and tools, or squaring the ends of a workpiece.
An optional mitering table can be purchased
(see sect. 11.0) to support the workpiece and
facilitate angles.
• Belt and platen (horizontal or vertical position)
– Workpieces of any length can be worked on
the belt and platen.
• Contact wheel – Grinding, polishing and
sanding against belt and contact wheel offers
smooth sanding, removing material more
rapidly than conventional grinding wheels.
• “Free strapping” is grinding, sanding, or
polishing on the underside of belt, opposite the
platen, without a backing behind the belt. This
method is especially suitable for contour work.
Fine belt grades are recommended because of
the rapid material removal.
Always use approved safety
glasses or face shield while operating this tool.
Failure to comply may cause serious injury.
7.1 On/Off Switch
Pull paddle switch (A, Figure 7-1) to start grinder,
push to stop. The safety key (A
to prevent unauthorized use of the grinder. The
safety key must be inserted to restart the grinder.
When the stop button is
pushed, the wheels may take a few moments to
completely stop.
Note: After extended operation, the grinder
housing may be warm to the touch. This is not
abnormal.
11
) can be removed
1
Figure 7-1: safety key
7.2 Precautions
7.2.1 Wheel grinding
1. Before starting grinder, turn grinding wheel by
hand to verify that it is clear of obstruction and
turns freely. The tool rest and spark guard
should not touch the wheel.
8.0 Adjustments
8.1 Eye Shield Tilt Adjustment
1. Loosen lock knob (A1, Figure 10).
2. Adjust eye shield (A
3. Tighten lock knob (A
) to desired tilt angle.
2
).
1
2. Keep tool rest and spark guard to within 1/16"
of grinding wheel.
3. Turn on grinder and allow it to reach full
running speed before starting to grind.
4. Adjust the eye shield as needed.
5. Keep a steady, moderate pressure on the
workpiece and keep it moving at an even pace
for smooth grinding. Pressing too hard
overheats the motor and prematurely wears
the grinding wheel. Note the original bevel
angle on the item to be sharpened and try to
maintain the same shape. The grinding wheel
should rotate into the object being sharpened.
6. If grinding a narrow w orkpiece, slide it laterally
across width of wheel. Using full width of
wheel will help prevent a groove from forming
at one place on the wheel.
7. Keep a water pot filled with water and dip your
work into it regularly to prevent overheating.
Overheating can weaken metals. Do not apply
water directly to grinding wheel.
8. Do not use the side of the g rinding wheel; this
puts dangerous stress on the wheel.
9. When wheel becomes loaded or dull, use an
approved grinding wheel dresser and dress
the wheel face.
7.2.2 Belt and Disc grinding
1. Remove belt before grinding on disc, to
prevent accidental contact of hands with belt.
2. Always grind on downward side of disc.
Grinding on upward side may cause workpiece
to catch and slip from your grasp.
3. At all times, keep hands and fingers away from
pinch points while grinding in disc or belt area.
Figure 8-1: eye shield adjustment
8.2 Spark Guard
As the wheel wears down, the spark guard must be
re-adjusted to maintain a maximum 1/16" distance.
Refer to Figure 8-1.
1. Loosen two hex cap screws (B
) with 14mm
1
wrench.
2. Slide spark guard (B
) to 1/16" distance from
2
grinding wheel surface.
3. Tighten screws (B
).
1
8.3 Tool Rest
As the wheel wears down, the tool rest must be readjusted to maintain a maximum 1/16" distance.
Refer to Figure 8-1.
1. Loosen two hex cap screws (C
) with 14mm
1
wrench.
2. Slide tool rest (C
) to within 1/16" from grinding
2
wheel.
3. Tighten screws (C
).
1
8.4 Belt tracking
Rotate belt by hand to check tracking. If belt shifts
to one side or the other, move tracking lever (D,
Figure 8-2) while rotating belt until belt completely
covers contact wheel and stays centered. Move
lever (D) down for left adjustment, up for right
adjustment. Turn on grinder to verify setting at
operational speed.
12
If belt refuses to track properly, the rubber contact
wheel must be adjusted parallel to drive wheel, as
follows:
1. If belt wanders away from grinder, loosen top
bolt (E, Figure 8-2) and tap top of cam plate
(F) away from grinder.
2. If belt wanders toward grinder, loosen top bolt
(E) and tap top of cam plate (F) toward
grinder.
3. Retighten bolt (E), and use lever (D) for final
tracking.
Figure 8-2: belt tracking
8.5 Platen adjustment
The platen should be set so that it just contacts
underside of tensioned belt, but not so high that
belt rides up over it, which will hasten wear on belt
and machine. Loosen hex nuts (G, Figure 8-3) and
adjust as needed.
1. Loop a piece of string through the grinding
wheel hole and suspend the wheel by holding
up the string.
2. Tap the wheel with a piece of scrap wood or a
wooden dowel.
3. A good wheel will "ring"; a defective wheel will
"thud". Discard any wheel that does not "ring".
An internal defect may not be apparent by visual
inspection alone. The ring test may identify an
internal crack or void.
9.2 Care of Grinding Wheels
In normal use, grinding wheels may become
cracked, grooved, rounded at the edges, chipped,
out of true or loaded with foreign material.
A cracked wheel should be replaced
IMMEDIATELY. The other conditions can be
remedied with a dressing tool. New wheels
sometimes require dressing to make them round.
See sect. 9.5.
9.3 Changing Wheels
The JET bench grinder comes equipped with a
general purpose grinding wheel. Wheels vary
according to types of abrasive, hardness, grit size,
and structure. Contact your local distributor for the
proper grinding wheel or wire wheel brush for your
application.
If you replace a wheel, obtain one with a safe rated
speed at least as high as the NO LOAD RPM
marked on the grinder's nameplate. Refer to Table
3 to determine correct dimensions for the
replacement wheel.
Figure 8-3: platen adjustment
9.0 User-maintenance
For safety, turn the switch to OFF and remove plug
from the power source outlet before adjusting and
maintaining the grinder. If the power cord is worn,
cut or damaged in any way, have it replaced
immediately.
9.1 Ring Test
Before replacing a grinding wheel, perform this
simple test on the replacement wheel:
Model
IBGM-8
Your bench grinder will accept most polishing and
buffing wheels available at dealers and hardware
stores.
accessory is not recommended and may result
in serious injury!
To change a wheel (see Figure 9-1):
1. Disconnect grinder from power source.
2. Loosen spark guard (A) and tool rest (B) and
move them away from wheel.
3. Remove wheel guard using a cross-point or
flathead screwdriver.
4. Stabilize wheel by holding opposite wheel
firmly, or placing a wood wedge between
wheel and tool rest.
Wheel
Diameter
8" 1" 5/8"
The use of any other
13
Maximum
Table 3
Width
Center
Hole
5. Unscrew arbor nut (C) with wrench. NOTE:
Left-hand threads; turn nut clockwise to
loosen.
6. Remove outer fl ange (D), wheel (E), and inner
flange.
Figure 9-1: wheel replacement
7. Clean flanges. Check the flanges to make sure
they are flat. Wheel flanges that are not flat will
cause the wheel to wobble.
8. Inspect the new grinding wheel and perform a
“ring test” (sect. 9.1). Do not install a damaged
wheel.
9. Install inner flange, wheel (E), outer flange (D)
and nut (C) on the shaft. Tighten nut.
of the current layer of abrasive to expose a fresh
surface. A wheel dresser is also used to “true” a
wheel; that is, to make the grinding surface parallel
to the tool rest, so the entire wheel face presents
an even surface to the work piece. Proper use of a
wheel dresser will eliminate high spots and result in
concentric rotation about the arbor, as well as
minimize vibration. See sect. 9.5.
9.4.2 Correcting side-to-side wobble
The IBGM Grinder has large, machined flanges,
making wobble unlikely if a good quality grinding
wheel is used. Should a wheel exhibit need for
adjustment:
1. Loosen nut and rotate outer flange a small
amount. Snug the nut and spin the wheel by
hand to check.
2. If wobble still exists, continue repeating step 1,
rotating outer flange incrementally in the same
direction. See Figure 9-2. Make sure to keep
the wheel in same position each time.
3. If complete rotation of outer flange has proved
ineffective, remove nut, outer flange, and
wheel (keep wheel in same orientation by
placing a pencil mark somewhere on it for
reference). Then rotate inner flange about 90°
and repeat the above steps for outer flange.
4. Continue this combination of flange
movements until the wobble is eliminated.
If required, a shim made of paper or card stock
may be placed between flange and wheel side.
Do not overtighten nut;
this may cause wheel to crack. Maximum
safe torque on nut is 20 lbf•ft (270 kgf•cm).
10. Reinstall guard cover. Adjust spark guard and
tool rest to 1/16" clearance from wheel.
9.4 Wheel balancing
With the grinder unplugged from the power
source, and the arbor nut snugged down, rotate
wheel by hand and observe its motion.
A grinding wheel has proper balance when:
1. The wheel’s outside face spins true and round;
that is, its circumference rotates concentric to
the arbor.
2. There is no side-to-side wobble.
The operator who takes time to patiently perform
needed adjustments will be rewarded by a wheel
running true, and accurate grinding of work pieces.
9.4.1 Adjusting concentricity
If the outside face is not rotating concentric to
arbor, try shifting the wheel closer to arbor
centerline before tightening the nut.
Another method of achieving concentricity is the
use of a wheel dresser. “Dressing” is the removal
Figure 9-2: wheel balancing
NOTE: Very slight wobble may still exist at spin-up
and spin-down, but will not affect normal speed
operation.
9.5 Dressing the wheel
Below is a general procedure for dressing a
grinding wheel.
Use safety glasses or face
shield during dressing operations.
1. Back off the tool rest enough to allow the
dresser to hook over its inside edge (Figure 9-
3). Tighten tool rest in position.
14
2. Turn on grinder and allow it to reach operating
speed.
3. Set wheel dresser on tool rest and bring it into
contact with wheel by raising its handle. Hold
the dresser firmly.
Note: If sparks appear, increase the pressure
of the dresser discs against the wheel.
4. Move dresser evenly left and right across
wheel face until wheel looks clean and is
square to tool rest.
5. Remove dresser, and adjust tool rest to 1/16”
away from the newly dressed wheel.
9.7 Cleaning
Metal shavings may still b e hot
from recent grinding operations. Make sure
shavings and debris are cold before cleaning
the grinder.
Avoid use of the following
cleaning chemicals or solvents: gasoline,
carbon tetrachloride, chlorinated solvents,
ammonia and household detergents contai ning
ammonia.
Brush all shavings from the motor housing, tool
rest, and wheel guard. Check grinding wheel for
cracks and chips. Replace if damaged.
Periodically use a cleaning stick (not provided)
against the belt and abrasive disc to remove buildup.
If the abrasive belt becomes loaded, it can be
cleaned in a solvent. Allow to dry thoroughly before
reinstalling.
9.8 Lubrication
Figure 9-3: wheel dressing
9.6 Wire wheel brushes
Wire brushing (not provided) is a fast way to
remove rust scale, burrs, and paint from metal. Use
coarse wire brushes for hard cleaning jobs. Use
fine wire brushes for polishing and finish work.
When the brush tips become dull, reverse the
brush on the grinder.
All motor bearings are permanently lubricated and
sealed at the factory and require no additional
lubrication.
9.9 Additional servicing
Any other servicing should be performed by an
authorized service representative.
15
10.0 Troubleshooting IBGM-8 Grinder with Multitool
Table 4
Symptom Possible Cause Correction *
Motor will not start. Not connected to power source. Verify that plug is properly inserted into
receptacle.
Switch in Off position. Make sure safety key is inserted.
Motor cord cut or abraded. Replace with new cord.
Motor will not start;
fuses blow or circuit
breakers trip.
Wheel cannot rotate because of
obstruction.
Plug on cord is faulty. Replace with new plug.
Low line voltage. Check power line for proper voltage.
Fuse blown or circuit breaker open. Re-set. May be too many machines on
Faulty switch. Replace switch.
Faulty capacitor. Replace capacitor.
Open circuit in motor or loose
connection.
Motor faulty. Contact JET technical service.
Too many machines running on
same circuit.
Incorrect fuse. Try time delay fuse, or go to circuit with
Wheel or belt cannot rotate because
of obstruction.
Undersized extension cord. Use correct size extension cord.
Unplug and turn grinding wheel by hand to
ensure free movement. Restart.
one line.
Inspect all lead connections on motor for
loose or open connections.
Turn off other machines and try again.
higher rated fuse or circuit breaker.
Unplug and turn grinding wheel or belt by
hand to ensure free movement. Clear any
obstructions and restart.
Short circuit in line cord or plug. Inspect cord or plug for damaged
insulation and shorted wires.
Short circuit in motor or loose
connections.
Motor fails to develop
full power.
Motor overheats. Motor overloaded. Reduce pressure against grinding wheel
Motor stalls, resulting
in blown fuses or
tripped circuit.
Low line voltage. Check power line for proper voltage.
Faulty motor or capacitor. Contact JET technical service.
Motor overloaded. Reduce load on motor; do not press so
Capacitor failure. Contact JET technical service.
Short circuit in motor or loose
connections.
Low voltage. Correct the low voltage conditions.
Incorrect fuses or circuit breakers in
power line.
Inspect all connections on motor for loose
or shorted terminals or worn insulation.
or belt. Make sure grit size is appropriate
for job.
hard when grinding.
Inspect connections on motor for loose or
shorted terminals or worn insulation.
Install correct fuses or circuit breakers.
16
Symptom Possible Cause Correction *
Motor slows. Motor overloaded. Reduce load on motor; do not press so
hard when grinding.
Low line voltage. Check power line for proper voltage.
Loose connections. Inspect connections.
Frequent fuse or circuit
breaker failure.
Excessive vibration. Grinding wheel out of balance;
Motor overloaded. Reduce load on motor; do not press so
Electrical circuit overload; too many
machines running on same circuit.
Incorrect fuse or circuit breaker. Have electrician upgrade service to outlet.
wobbling or not rotating concentric to
arbor.
Improper mounting. Secure grinder firmly to bench or stand.
* WARNING: Some corrections may require a qualified electrician.
hard when grinding.
Turn off other machines and try again.
Dress grinding wheel or replace it. Adjust
wobble by rotating flange as needed.
17
11.0 Optional accessories
These accessory items, purchased separately, are available for your JET bench grinder. Contact your dealer to
order, or call JET at the phone number on the cover.
577113 577117 577119
Mitering Table Kit for Multitool Buffing Compound Kit Metalworking Belt/Disc Starter Kit
578172 578173 578100
Stand for Grinders Deluxe Stand for Grinders Flexible 3W LED Lamp
The following accessories are for using the Grinder with the JET #414800 (JDCS-505) Dust Collection Stand:
414825 Reducer, 3 in. to 2.5 in.
414811 0.6M Hose, Heat Resistant, ø2.5 x 24.4 in.
(includes two 1/4 x 3/8 mounting screws)
12.0 Replacement Parts
Replacement parts are listed on the following pages. To order parts for the main grinder unit or reach the JET
service department, call 1-800-274-6848 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.
Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET.
Some parts are shown for reference only, and may not be available individually.
For replacement parts on the Multitool Attachment, contact:
H&B Distributors
Multitool-USA
14711 Artesia Blvd.
La Mirada, CA 90638
800-660-0880
www.multitool-usa.com
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12.1.1 IBGM-8 Grinder with Multitool – Exploded View
19
12.1.2 IBGM-8 Grinder with Multitool – Parts List
Index No Part No Description Size Qty
1 ................ IBG8-01 ..................... Truss Head Screw ................................................... 3/16"-24 x 1/4" .............. 4
2 ................ IBG8-02 ..................... Rubber Pad ............................................................. ...................................... 4
3 ................ IBG8-03 ..................... Base Plate ............................................................... ...................................... 1
4 ................ IBG8-04 ..................... Truss Head Screw ................................................... 3/16"-24 x 3/8" ............ 10
5 ................ IBG8-05 ..................... Capacitor Bracket .................................................... ...................................... 1
6 ................ IBG8-06 ..................... Start Capacitor ......................................................... 200MFD, 125VAC ......... 1
7 ................ IBG8-07 ..................... Capacitor Cover ....................................................... ...................................... 1
8 ................ TS-0050021 .............. Hex Cap Screw ........................................................ 1/4"-20 x 5/8" ................ 5
9 ................ TS-0720071 .............. Lock Washer ............................................................ 1/4" ................................ 5
10 .............. IBG8-10 ..................... Base......................................................................... ...................................... 1
11 .............. IBG8-11 ..................... Cord Plate ................................................................ ...................................... 1
12 .............. IBG8-12 ..................... Switch Plate ............................................................. ...................................... 1
13 .............. IBG8-13 ..................... Switch with Safety Key ............................................ ...................................... 1
.................. IBG8-13-1 .................. Safety Key ............................................................... ...................................... 1
14 .............. IBG8-14 ..................... Motor Housing ......................................................... ...................................... 1
15 .............. IBG8-15 ..................... Stator ....................................................................... ...................................... 1
16 .............. IBG8-16 ..................... Rotor ........................................................................ ...................................... 1
17 .............. IBG8-17 ..................... Motor Fan ................................................................ ...................................... 1
18 .............. BB-6204ZZ ................ Ball Bearing ............................................................. 6204ZZ ......................... 2
19 .............. IBG8-19 ..................... End Bell ................................................................... ...................................... 2
20 .............. TS-1540031 .............. Hex Nut .................................................................... M5 ... .............................. 4
21 .............. IBG8-21 ..................... Wheel Guard............................................................ ...................................... 1
22 .............. IBG8-22 ..................... Wheel Flange........................................................... ...................................... 2
23 .............. IBG8-23 ..................... Grinding Wheel ....................................................... #36 Grit, 8" Dia ............. 1
24 .............. IBG8-24 ..................... Hex Nut (Left Hand Thread) .................................... 5/8" ................................ 1
25 .............. IBG8-25 ..................... Wheel Cover ............................................................ ...................................... 1
26 .............. IBG8-26 ..................... Truss Head Screw ................................................... 1/4"-20 x 3/4" ................ 5
27 .............. IBG8-27 ..................... Tool Rest-Left .......................................................... ...................................... 1
28 .............. TS-0680041 .............. Flat Washer ............................................................. 3/8" ................................ 2
29 .............. IBG8-29 ..................... Hex Cap Screw ........................................................ 3/8"-16 x 5/8" ................ 2
31 .............. TS-0060011 .............. Hex Cap Screw ........................................................ 3/8"-16 x 1/2" ................ 2
32 .............. IBG8-32 ..................... Spark Guard – Left .................................................. ...................................... 1
33 .............. IBG8-33 ..................... Eye Shield ............................................................... ...................................... 1
34 .............. IBG8-34 ..................... Eye Shield Bracket -Left .......................................... ...................................... 1
35 .............. IBG8-35 ..................... Eye Shield Plate ...................................................... ...................................... 1
36 .............. IBG8-36 ..................... Truss Head Screw ................................................... 3/16"-24 x 1/2" .............. 2
37 .............. IBG8-37 ..................... Knob ........................................................................ ...................................... 1
38 .............. TS-0680021 .............. Flat Washer ............................................................. 1/4" ................................ 1
41 .............. IBG8-41 ..................... Centrifugal Switch Assembly ................................... ...................................... 1
42 .............. IBG8-42 ..................... Screw ....................................................................... M5 x 0.8 x 205 .............. 4
46 .............. IBG8-46 ..................... Power Cord .............................................................. ...................................... 1
47 .............. IBG8-47 ..................... Strain Relief ............................................................. ...................................... 1
48 .............. IBG8-48 ..................... Capacitor Bracket .................................................... ...................................... 1
49 .............. IBG8-49 ..................... Running Capacitor ................................................... 35μF, 250V ................... 1
50 .............. IBG8-50 ..................... Lamp Fixed Bracket ................................................. ...................................... 1
51 .............. TS-081F031 .............. Flat Head Cross Screw ............................................ 1/4" x 1/2"...................... 2
53 .............. TS-0680041 .............. Flat Washer ............................................................. 3/8" ................................ 2
54 .............. IBG8-54 ..................... Dresser Assembly.................................................... Dia. 1-1/4 ...................... 1
54-1 ........... IBG8-54-1 .................. Body......................................................................... .............................
54-2 ........... IBG8-54-2 .................. Hood ........................................................................ ...................................... 1
54-3 ........... IBG8-54-3 .................. Cutter ....................................................................... ...................................... 4
54-4 ........... IBG8-54-4 .................. Cutter Washer.......................................................... ...................................... 2
54-5 ........... IBG8-54-5 .................. Pin............................................................................ 6mm .............................. 1
54-6 ........... TS-1503051 .............. Socket Head Cap Screw ......................................... M6 x 20 ......................... 1
54-7 ........... IBG8-54-7 .................. Square Nut .............................................................. M6 ................................. 1
100 ............ IBG8-100 ................... Eye Shield Assembly – Left (includes 31-38,53) ..... ...................................... 1
.................. LM000300 ................. ID/Warning Label, JIGM-8 (not shown) ................... ...................................... 1
.................. JET-92 ....................... JET Logo (not shown) ............................................. 92x38mm ...................... 1
20
......... 1
MultiTool Attachment:
.................. 577115 ...................... Rubber Contact Wheel (not shown) ........................ 2” x 3-1/2” ..................... 1
For other replacement parts on the Mulitool attachment, contact Multitool at 800-660-0880.
13.0 Wiring Diagram for IBGM-8 Grinder with Multitool
21
14.0 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 Covered
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 initial purchase when 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 Applies
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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23
427 New Sanford Road
LaVergne, Tennessee 37086
Phone: 800-274-6848
www.jettools.com
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