Jet IBGB-248VS, IBGB-436VS, IBGB-248, IBGB-436 Operating Instructions And Parts Manual
Operating Instructions and Parts Manual
This .pdf document is bookmarked
8-inch Grinder with Belt Sander
Models IBGB-248/248VS/436/436VS
Variable speed model IBGB-436VS shown
JET
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-577248
Ph.: 800-274-6848 Edition 3 07/2019
www.jettools.com Copyright © 2019 JET
1
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 bench grinder 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 bench grinder 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.)
7. Use the grinder’s eye shields and spark guards.
Also use respiratory protection if the grinding or
sanding operation is dusty.
8. 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.
9. Wear protective clothing such as apron or
safety shoes, where the grinding activity
presents a hazard to the operator.
10. Wear ear protectors (plugs or muffs) if the
particular work requires it.
11. Do not operate this machine while tired or under
the influence of drugs, alcohol or any
medication.
12. Make certain the switch is in the OFF position
before connecting the machine to the power
supply.
13. Make certain the machine is properly grounded.
14. Make all machine adjustments or maintenance
with the machine unplugged from the power
source.
15. 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.
16. 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.
17. 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.
18. Provide for adequate space surrounding work
area and non-glare, overhead lighting.
19. Keep the floor around the machine clean and
free of scrap material, oil and grease.
20. Keep visitors a safe distance from the work
area. Keep children away.
21. Make your workshop child proof with padlocks,
master switches or by removing starter keys.
22. Give your work undivided attention. Looking
around, carrying on a conversation and “horseplay” are careless acts that can result in serious
injury.
23. Keep proper footing and balance at all times so
that you do not fall into or lean against the
grinding wheel or other moving parts. Do not
overreach or use excessive force to perform
any machine operation.
24. Disconnect grinder from power source before
servicing and when changing abrasive wheel or
sanding belt.
25. Use recommended accessories. The use of
improper accessories may cause risk of injury
to persons.
26. Turn off the machine before cleaning. Use a
brush to remove chips or debris — do not use
bare hands.
2
27. Never leave grinder running unattended. Turn
power off and do not leave machine until wheel
comes to a complete stop.
28. Remove loose items and unnecessary work
pieces from the area before starting the grinder.
29. 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.
30. Keep work area clean. Cluttered areas and
benches invite accidents.
31. Use the right tool. Don't force tool or attachment
to do a job for which it was not designed.
32. 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 (see sect. 6.2) 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.
33. Maintain tools with care. Keep tools sharp and
clean for best and safest performance. Follow
instructions for lubricating and changing
accessories.
34. Direction of feed: Feed work into a blade or
cutter against the direction of rotation of the
blade or cutter only.
35. Do not overtighten wheel nut.
36. Frequently clean grinding dust from beneath
grinder.
37. Use grinding wheel suitable for speed of
grinder.
38. 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.
39. Verify that maximum RPM of abrasive wheels is
compatible with speed of grinder. Do not
remove the blotter (label) from either side of a
grinding wheel.
Familiarize yourself with the following safety notices used in this manual:
40. Allow abrasive wheel to reach full RPM before
starting the grinding operation.
41. Do not crowd the work so that the wheel slows.
42. Tool rests should be adjusted to approximately
1/16” from wheel surface.
43. Do not grind on the side of a wheel; do all work
on the grinding face or edge near the tool rest.
44. Do not grind aluminum or magnesium, as these
may pose a fire hazard.
45. Use only the flanges that are furnished with the
grinder.
46. Do not start the grinder while a workpiece is
contacting the grinding wheel or the sanding
belt.
WARNING: This product can expose you to
chemicals including lead which is known to the
State of California to cause cancer and birth
defects or other reproductive harm. For more
information go to http://www.p65warnings.ca.
gov.
WARNING: Some dust, fumes and gases
created by power sanding, sawing, grinding,
drilling, welding and other construction activities
contain chemicals known to the State of
California to cause cancer and 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 dust masks that are
specifically designed to filter out microscopic
particles. For more information go to
http://www.p65warnings.ca. gov/ and http://www
.p65warnings.ca.gov/wood.
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
4.2 Machine dimensions/work area .................................................................................................................. 8
5.0 Carton contents .............................................................................................................................................. 9
6.0 Setup and assembly ..................................................................................................................................... 10
6.1 Tools required for assembly ..................................................................................................................... 10
6.2 Unpacking ................................................................................................................................................ 10
6.3 Securing the grinder ................................................................................................................................. 10
6.4 Assembling eye shield bracket to spark guard ......................................................................................... 10
6.5 Installing spark guard/bracket .................................................................................................................. 10
6.6 Eye shield ................................................................................................................................................. 10
6.7 Grinder tool rest ........................................................................................................................................ 10
6.8 Sanding table ........................................................................................................................................... 11
6.9 Stand-off ................................................................................................................................................... 11
6.10 Sanding tool rest .................................................................................................................................... 11
6.11 Dust port ................................................................................................................................................. 11
7.0 Electrical connections .................................................................................................................................. 12
7.1 GROUNDING INSTRUCTIONS ............................................................................................................... 12
7.2 Extension cords ........................................................................................................................................ 12
7.3 Voltage conversion ................................................................................................................................... 13
8.0 Adjustments ................................................................................................................................................. 13
8.1 Eye shield tilt adjustment .......................................................................................................................... 13
8.2 Spark guard .............................................................................................................................................. 13
8.3 Tool rest ................................................................................................................................................... 13
8.4 Sanding arm tilt ........................................................................................................................................ 13
8.5 Sanding belt tracking ................................................................................................................................ 13
9.0 Operation ..................................................................................................................................................... 14
9.1 Operating controls .................................................................................................................................... 14
9.2 Precautions .............................................................................................................................................. 15
10.0 User-maintenance ...................................................................................................................................... 15
10.1 Installing/replacing sanding belt ............................................................................................................. 15
10.2 Care of grinding wheels .......................................................................................................................... 15
10.3 Ring test ................................................................................................................................................. 15
10.4 Changing wheels .................................................................................................................................... 16
10.5 Wheel balancing ..................................................................................................................................... 16
10.6 Dressing the wheel ................................................................................................................................. 17
10.7 Wire wheel brushes ................................................................................................................................ 17
10.8 Cleaning ................................................................................................................................................. 17
10.9 Tension lever tightness .......................................................................................................................... 17
10.10 Lubrication ............................................................................................................................................ 17
10.11 Additional servicing .............................................................................................................................. 17
11.0 Optional accessories .................................................................................................................................. 18
12.0 Troubleshooting IBGB series Sander/Grinder ............................................................................................ 19
12.1 General mechanical and electrical problems ......................................................................................... 19
12.2 Digital readout error codes (Variable speed models) ............................................................................. 20
13.0 Replacement Parts ..................................................................................................................................... 21
13.1.1 IBGB-248 Sander/Grinder – Exploded View ....................................................................................... 22
13.1.2 IBGB-248 Sander/Grinder – Parts List ................................................................................................ 23
13.2.1 IBGB-248VS Sander/Grinder – Exploded View .................................................................................. 25
13.2.2 IBGB-248VS Sander/Grinder – Parts List ........................................................................................... 26
13.3.1 IBGB-436 Sander/Grinder – Exploded View ....................................................................................... 28
13.3.2 IBGB-436 Sander/Grinder – Parts List ................................................................................................ 29
13.4.1 IBGB-436VS Sander/Grinder – Exploded View .................................................................................. 31
13.4.2 IBGB-436VS Sander/Grinder – Parts List ........................................................................................... 32
14.0 Electrical Connections ................................................................................................................................ 34
4
14.1 Wiring diagram for IBGB-248 and IBGB-436 ......................................................................................... 34
14.2 Wiring diagram for IBGB-248VS and IBGB-436VS ................................................................................ 34
15.0 Warranty and service ................................................................................................................................. 35
3.0 About this manual
This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model IBGB
series Grinder/Belt Sander. 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, long-term operation if used in accordance with the instructions set forth in this
document.
The operator is encouraged to familiarize him/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 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!
Register your product using the provided mail-in card, or register online:
http://www.jettools.com/us/en/service-and-support/warranty/registration/
5
4.0 Specifications
Table 1
Stock number
Model number IBGB-248VS IBGB-248 IBGB-436VS IBGB-436
Motor and Electricals
Type
Horsepower 1HP
Phase single
Motor
Input power required
On/off switch TACT toggle TACT toggle
Power transfer Direct drive
Power cord SJT 16AWG x 3C, 6 ft. (183cm)
Power plug provided 5-15P, 125V/15A
Recommended circuit size 1 15 A
Sound emission without load 2 75 dB at 3 ft. (92cm)
Grinding wheel and shaft
Arbor diameter 5/8 in. (16 mm)
Grinding wheel size (OD x W x Bore) 8 x 1 x 5/8 in.
Grinding wheel grit provided 36
Grinding wheel speed (RPM) 900~3600 3600 900~3600 3600
Grinding wheel material Aluminum oxide
Belt sander
Sanding belt size (L x W) 48 x 2 in. (1219 x 50.8 mm) 36 x 4 in. (914.4 x 101.6 mm)
Sanding belt grit provided 80
Belt speed (SFPM) 1178~4712 4,712 942~3769 3,769
Sanding belt material Aluminum oxide
Sanding table tilt 45 deg. down
Sanding table size 4-11/32 x 2-15/16 in. (110 x 75mm) 6-5/16 x 2-15/16 in. (160 x 75mm)
Tool rest tilt 45 deg. down
Tool rest size (L x W) 3-1/8 x 2-5/8 in. (79 x 67mm) 5-1/8 x 3-1/8 in. (130 x 80mm)
Drive wheel size (Dia. x W) 5 x 2-1/16 in. (127.5 x 53mm) 4 x 4-1/16 (102.5 x 104mm)
Dust port diameter 2 in. (50.8mm)
Recommended min. dust extraction 350 CFM
Dimensions
Foot print (W x D) 9-1/2 W x 8-1/16 in. (241 x 204.8 mm)
Overall
dimensions
(LxWxH)
Shipping dimensions (L x W x H)
Weights
Net weight
Shipping weight
Voltage 115/230V, prewired 115V
Cycle 60 Hz
Listed FLA (full load amps) 7 / 3.5 A 11 / 5.5 A 7 / 3.5 A 11 / 5.5 A
Starting capacitor n/a
Running capacitor
Sanding bracket
vertical
Sanding bracket
parallel
577248 578248 577436 578436
Induction,
with inverter
n/a
Single phase 115V (or single phase 230V if rewired)
21-1/4 x 12-9/32 x 25-29/32 in.
(539 x 312 x 658 mm)
21-1/4 x 24-3/4 x 13-15/16 in.
(539 x 629 x 354 mm)
26-9/16 x 24-19/32 x 16-15/16 in.
(675 x 625 x 430 mm)
78 lbs.
(35.30kg)
96 lbs.
(43.66 kg)
Induction,
capacitor start,
centrifugal switch
200MFD,
125VAC
35µF, 250V n/a 35µF, 250V
77 lbs.
(35.02 kg)
95 lbs.
(43.38 kg)
Induction,
with inverter
n/a
23-7/32 x 12-7/32 x 20-3/4 in.
(590 x 310 x 527 mm)
23-7/32 x 19-1/2 x 13-15/16 in.
(590 x 496 x 354 mm)
21-15/32 x 24-19/32 x 16-15/16 in.
(545 x 625 x 430 mm)
77 lbs.
(34.95 kg)
93 lbs.
(42.04 kg)
Induction,
capacitor start,
centrifugal switch
200MFD,
125VAC
(34.65 kg)
(41.74 kg)
76 lbs.
92 lbs.
6
IBGB-248VS IBGB-248 IBGB-436VS IBGB-436
Main materials
Motor housing Sheet metal
End cover Aluminum (Grinder side) / Cast iron (Belt sander side)
Base Cast iron
Grinder
Sander
1
subject to local and 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, D = depth
OD = outside diameter
n/a = not applicable
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.
Tool rest Cast iron
Inner wheel guard Cast iron
Outer wheel guard Aluminum
Flange washer Cast iron
Eye shield Polycarbonate
Belt table Cast iron
Belt table bracket Sheet metal
Tool rest Sheet metal
Tool rest bracket Sheet metal
4.1 Mounting hole dimensions
Figure 4-1 Mounting dimensions, all models
7
4.2 Machine dimensions/work area
Figure 4-2: dimensions for IBGB-248/-248VS (primary dimensions in millimeters)
Figure 4-3: dimensions for IBGB-436/-436VS (primary dimensions in millimeters)
8
5.0 Carton contents
Refer to Figures 5-1 thru 5-4. The identifying letters
are used in the assembly instructions.
Figure 5-1
Eye shield hardware
Part no. IBG8-100
A Spark guard 1
B Lock knob 1
C Flat washer, 1/4" 1
D Eye shield bracket 1
E Eye shield plate 1
F Hex cap screw, 3/8 x 5/8" 2
G Hex cap screw, 3/8 x 1/2" 2
H Truss head screw, 3/16 x 1/2” 2
J Flat washers 3/8” 4
Qty.
Figure 5-3
Dust port package Qty.
Dust port 1
Truss head screw 3/16 x 3/8 3
Figure 5-2
Hardware package
Part no. IBGB248-HP or IBGB436-HP
K Tool rest (for sanding belt) 1
L Flat washer 3/8 1
M Adjustable handle 3/8 x 5/8L 1
N Stand-off 1
O Socket hd cap screw 5/16 x 1/2 1
P Flat washer 5/16 1
R Ext. tooth lock washer M8 1
S Bracket plate 1
T Flat washer 5/16 1
U Adjustable handle 5/16 x 1L 1
Figure 5-4
Additional items Qty.
V Eye shield 1
W Sanding table 1
X Hex wrench 6 x 140L mm 1
Y Grinder tool rest 1
Z Wheel dresser 1
Grinder with Belt Sander (not shown) 1
Sanding belt 80G (preinstalled) 1
Grinding wheel 36G (preinstalled) 1
Qty.
9
6.0 Setup and assembly
6.1 Tools required for assembly
Cross-point (Phillips) screwdriver
14mm (or adjustable) wrench
3mm hex wrench
6mm hex wrench
6.2 Unpacking
Separate all parts from the packing material. Check
each part against sect. 5.0, Carton contents, and
make certain that all items are accounted for.
(Check whether any parts have been pre-mounted
to the grinder.) Notify your dealer or JET if missing
or damaged items are discovered. Do not discard
any packing material until grinder is assembled and
operating properly.
The IBGB Grinder/Belt Sander requires only
minimal assembly. 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.
Make sure that bench grinder is
unplugged and power switch is in OFF position.
Do not plug in the grinder to power until it is
inspected for shipping damage, fully
assembled, and moved to its permanent
location. Failure to comply may cause serious
injury.
Do not operate this machine
without all guards and shields in place and in
working order. Failure to comply may cause
serious injury.
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.
6.3 Securing the grinder
To prevent the machine from moving during
operation, it should be securely mounted to a work
bench or grinder stand. Fasteners for mounting are
not included with the grinder.
1. Align mounting holes on grinder with predrilled
holes in bench or grinder stand. Figure 4-1
shows hole centers for mounting.
2. Insert M10 (or 3/8”) bolts through the holes and
secure with washers and nuts.
An optional JET pedestal stand (not included) is
available for your grinder. See sect. 11.0.
IMPORTANT: The grinder’s base plate contains
ventilation holes for heat dissipation. This is
especially important on the variable speed models,
as it helps keep the circuit board at an acceptable
temperature. These holes should not be obstructed.
If the rubber pads are removed for mounting to a
table, allow an opening in the table below the grinder
for air circulation. However, it is recommended the
rubber pads be left on, as they allow air circulation
as well as vibration dampening.
6.4 Assembling eye shield bracket to
spark guard
Refer to Figure 6-1.
Note: Spark guard (A) and eye shield bracket (D)
are marked L for left side assembly. Assemble these
using Figure 6-1 as a guide.
Figure 6-1: bracket to spark guard
6.5 Installing spark guard/bracket
Refer to Figure 6-2.
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
6.6 Eye shield
Refer to Figure 6-2.
1. Insert two 3/16” x 1/2” truss head screws (H)
through bracket, eye shield (V), and plate (E)
which contains threaded mounting holes.
2. Tighten screws (H).
6.7 Grinder tool rest
Refer to Figure 6-2.
1. Install tool rest (Y) by inserting two 3/8" x 3/4"
hex cap screws (F) through two 3/8" flat
washers (J), through the tool rest (Y), 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
10
must be readjusted to maintain a maximum
1/16" clearance.
Figure 6-4: installing handles
6.9 Stand-off
1. Install stand-off (shown installed in Figure 8-2)
into threaded hole in back of sanding arm.
2. Loosen screw (A, Figure 6-5) with 6mm hex
wrench and lower sanding arm to horizontal
position.
3. Turn stand-off in or out as needed until sanding
arm is level with workbench.
4. Tighten hex nut against sanding arm to secure
setting of stand-off.
Figure 6-2: guard and tool rest
6.8 Sanding table
Install bracket plate, table and handles, as shown in
Figure 6-3.
Figure 6-3: sanding belt table
The quickest method of installing a handle is to start
the handle into the threads of the hole, then pull out
on the handle while turning the screw with a 3mm
hex wrench until tight. See Figure 6-4.
To reposition a handle for convenience without
affecting its tightness, pull out on it, rotate, then
release it, allowing it to resettle upon the screw.
6.10 Sanding tool rest
Loosen screw (A, Figure 6-5) with 6mm hex wrench
and lower sanding arm to horizontal position.
Install tool rest as shown in Figure 6-5, using a 6mm
hex wrench.
Note: The tool rest can remain installed when not in
use. Simply adjust it outward to allow opening and
closing of drive wheel cover. Adjust it inward before
raising arm to vertical position.
Figure 6-5: Sanding tool rest
6.11 Dust port
Install dust port (B, Figure 6-5) over exhaust hole in
sanding arm, with three screws.
It is recommended that a dust collection system
designed for metal dust and shavings be connected
to the ports on grinder and belt sander, using 2-1/2”
inside diameter hose with hose clamp (not
provided).
11
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