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Operating Instructions and Parts Manual
JBG Series Bench Grinders
Models: JBG-6B, JBG-8B, JBG-10B
JET
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-577101-B
Ph.: 800-274-6848 Edition 1 05/2018
www.jettools.com Copyright © 2018 JET
Model JBG-8B shown
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
cutting 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. CALIFORNIA PROPOSITION 65 WARNING:
This product contains chemicals known to the
State of California to cause cancer, or birth
defects or other reproductive harm.
12. 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.)
13. Do not operate this machine while tired or
under the influence of drugs, alcohol or any
medication.
14. Make certain the switch is in the OFF position
before connecting the machine to the power
supply.
15. Make certain the machine is properly
grounded.
16. Make all machine adjustments or maintenance
with the machine unplugged from the power
source.
17. 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.
18. 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.
19. 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.
20. Provide for adequate space surrounding work
area and non-glare, overhead lighting.
21. Keep the floor around the machine clean and
free of scrap material, oil and grease.
22. Keep visitors a safe distance from the work
area. Keep children away.
23. Make your workshop child proof with padlocks,
master switches or by removing starter keys.
24. Give your work undivided attention. Looking
around, carrying on a conversation and “horseplay” are careless acts that can result in
serious injury.
25. 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.
2
26. Disconnect grinder from power source before
servicing and when changing abrasive wheels.
27. Use recommended accessories. The use of
improper accessories may cause risk of injury
to persons.
28. Turn off the machine before cleaning. Use a
brush to remove chips or debris — do not use
your hands.
29. Never leave the grinder running unattended.
Turn power off and do not leave machine until
wheels come to a complete stop.
30. Remove loose items and unnecessary work
pieces from the area before starting the
grinder.
31. 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.
32. Keep work area clean. Cluttered areas and
benches invite accidents.
33. Use the right tool. Don't force tool or
attachment to do a job for which it was not
designed.
34. 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.
35. Maintain tools with care. Keep tools sharp and
clean for best and safest performance. Follow
instructions for lubricating and changing
accessories.
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 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 wheels
is compatible with speed of grinder. Do not
remove the blotter (label) from either side of a
grinding wheel.
42. Allow abrasive wheels to reach full RPM
before starting the grinding operation.
43. Do not crowd the work so that the wheels
slow.
44. Tool rests 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, as
these may pose a fire hazard.
47. Use only the flanges that are furnished with
the grinder.
48. Do not start the grinder while a workpiece is
contacting a grinding wheel.
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 pr ecauti ons are not heeded, it may result i n s erious i njury or possibly
even death.
- - SAVE THESE INSTRUCTIONS - -
3
2.0 Table of Contents
1.0 IMPORTANT SAFETY INSTRUCTIONS ............................................................................................... 2
2.0 Table of Contents ................................................................................................................................... 4
3.0 Introduction ............................................................................................................................................ 5
4.0 Specifications ......................................................................................................................................... 5
5.0 Unpacking .............................................................................................................................................. 6
5.1 Contents of shipping container ........................................................................................................... 6
5.2 Tools Required for Assembly ............................................................................................................. 6
6.0 Assembly ................................................................................................................................................ 7
6.1 Assembling Spark Guard and Eye Shield Mounting Brackets ........................................................... 7
6.2 Installing Spark Guard and Eye Shiel d Mount in g Brackets ............................................................... 8
6.3 Tool Rests .......................................................................................................................................... 8
6.4 Eye Shields ......................................................................................................................................... 8
6.5 Mounting the Grinder .......................................................................................................................... 8
7.0 Electrical connections ............................................................................................................................ 9
7.1 GROUNDING INSTRUCTIONS ......................................................................................................... 9
7.2 Extension Cords ................................................................................................................................. 9
8.0 Operation ............................................................................................................................................. 10
8.1 Switch ............................................................................................................................................... 10
8.2 Precautions ....................................................................................................................................... 10
9.0 Adjustments ......................................................................................................................................... 10
9.1 Eye Shield Tilt Adjustment ............................................................................................................... 10
9.2 Spark Guard ..................................................................................................................................... 10
9.3 Tool Rest .......................................................................................................................................... 10
10.0 User-maintenance .............................................................................................................................. 11
10.1 Ring Test ........................................................................................................................................ 11
10.2 Care of Grinding Wheel .................................................................................................................. 11
10.3 Changing Wheels ........................................................................................................................... 11
10.4 Grinding Wheels ............................................................................................................................. 12
10.5 Wire Wheel Brushes ....................................................................................................................... 12
10.6 Cleaning ......................................................................................................................................... 12
10.7 Lubrication ...................................................................................................................................... 12
10.8 Additional servicing ........................................................................................................................ 12
11.0 Troubleshooting JBG Series Bench Grinders .................................................................................... 13
12.0 Replacement Parts ............................................................................................................................. 13
12.1.1 JBG-B Series Grinders – Exploded View .................................................................................... 14
12.1.2 JBG-B Series Grinders – Parts List ............................................................................................. 15
13.0 Electrical Connections – JBG Series Grinders .................................................................................. 18
14.0 Warranty and Service......................................................................................................................... 20
The specifications in t his m anual are gi ven as gener al inf ormation and ar e not bin ding. JET reserves the
right to effect, at an y tim e and without pr ior not ice, c ha nges or altera tions to parts, f ittings, and ac cess ory
equipment deemed necessary for any reason whatsoever.
4
3.0 Introduction
This manual is provided by JET covering the safe operation and maintenance procedures for the JET
JBG Series Bench Grind er s. This manual cont ains i nstr uctions on insta llatio n, saf ety preca utions , gener al
operating procedures , maintenance instruc tions and parts breakdown. T his machine has been d esigned
and constructed to provide consistent, long-term operation if used in accordance with instructions set
forth in this manual. If there are any questions or comments, please cont act either your loca l supplier or
JET. JET can also be reached at our web site: www.jettools.com.
4.0 Specifications
Model .................................................................... JBG-6B ......................... JBG-8B .................. ..... JBG-10B
Stock Number ....................................................... 577101 .......................... 577102 .......................... 577103
Overall Dimension (L x H x D/in) ......... 18 x 10-1/2 x 8-1/2 ............ 19 x 12-1/2 x 10 ...... 24-1/2 x 12-1/4 x 13
Wheel Size (D x W x Bore /in) ...................... 6 x 3/4 x 1/2 ..................... 8 x 1 x 5/8 ...................... 10 x 1 x 1
Wheels Included/Grit ............................................ 60 & 36 .......................... 60 & 36 .......................... 46 & 24
Motor ................................................ 5.0 Amp, 115V, 1PH ..... 8.0 Amp, 120V, 1PH ... 10.0 Amp, 120V, 1PH
Motor Output .......................................................... 1/4 HP ........................... 1/2 HP .............................. 1 HP
Input Power Required .......................... 370W, 115V, 1PH ......... 746W, 120V, 1PH ....... 1100W, 120V, 1PH
Motor RPM ............................................................... 3,450 ............................. 3,450 ............................. 1,750
Gross Weight (lbs.) ....................................................... 38 .................................. 60 ................................ 119
The above specif ic atio ns were c ur rent at the time this manual was publishe d, but becaus e of our po licy of
continuous improvem ent, JET reserves the right to change specif ications at any time and without prior
notice, without incurring obligations.
Read and understand the entire contents of this manual before attempting
assembly or operation! Failure to comply may cause serious injury
5
5.0 Unpacking
Separate all parts from the packing material. Check each part against the Contents of the Shipping
Container and make certain that all items are accounted for before discarding any packing material.
5.1 Contents of shipping container
1 Bench Grinder (not shown)
1 Hardware package (contents below)
1 Operating Instructions and Parts Manual
1 Product Registration Card
Hardware
1 ea Spark Guard – Left (A)
2 ea Lock Knob (B)
1 ea Spark Guard – Right (C)
1 ea Eye Shield Bracket – Left (D)
1 ea Eye Shield Bracket – Right (F)
2 ea Eye Shield Plate (G)
4 ea M8x20 Hex Cap Screw (H)
4 ea 8mm Flat Washer (J)
4 ea M5x10 Pan Head Screw (K)
4 ea M6x12 Hex Cap Screw (L)
6 ea 6mm Flat Washer (M)
2 ea 6mm Lock Washer (N)
1 ea Tool Rest – Left (O)
1 ea Tool Rest – Right (P)
2 ea Eye Shields (Q)
5.2 Tools Required for Assembly
10mm and 12mm Wrenches
No. 1 or No. 2 Cross Point Screwdriver
Figure: Hardware
6
6.0 Assembly
Your bench grinder requires only the assembly of
the eye shields and too l rests. For your safety, do
not plug the grinder into a power source until all
adjustments are complete. An adjustable wrench
and a Phillips screwdr iver a r e the only tools you will
need to make all normal adjustments and wheel
changes on this grinder.
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,
fully assembled, and moved to its permanent
location! 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!
Chipped or crack ed wheels can
break up and cause serious damage to the
grinder and/or severe injury to the operator!
Regularly inspect wheels for damage!
6.1 Assembling Spark Guard and Eye
Shield Mounting Brackets
Parts needed:
2 Brackets (D) (see Note)
2 Lock Knobs (A)
2 Spark Guards (C) (see Note)
2 6mm Flat Washers (B)
2 6mm Lock Washers (E)
Note: Brackets (D) and spark guards (C) are
marked L (G, Fig. 1) for left side ass embly and R
for right side assembly.
1. Assemble the left spark guard and eye shield
mounting bracket using Figure 1 as a guide.
Make sure the spark guard and bracket are
marked L.
2. Assemble the right assembly in the same
manner.
Figure 1
7
6.2 Installing Spark Guard and Eye
Shield Mounting Brackets
Refer to Figure 2:
Parts needed:
2 Spark Guard and Eye Shield Brackets
assembled from previous page
4 M6 x 12 Hex Cap Screws (E)
4 6mm Flat Washers (F)
1. Install the left spark guard and mounting
bracket (A) to the left wheel housing (M) with
two M6 x 12 hex cap screws (E) and two 6mm
flat washers (F).
The spark guards (A
within 1/16" of the grinding wheel surface or
other accessory being used.
2. Install the right spark guard and mounting
bracket in the same manner.
Note: As the wh eel wears down, the spar k guards
must be re-adjusted to maintain the 1/16" distance.
) should be adjusted to
1
6.3 Tool Rests
Refer to Figure 2:
Parts needed:
2 Tool Rest Left (J) and Right (not shown)
4 M8x20 Hex Cap Screws (C)
4 8mm Flat Washers (D)
Note: There is a left and a right too l rest. Refer to
Figure 1 to ensure that you install them correctly.
1. Install the left tool rest (J) by threading two
M8x20 hex cap screws (C) through two 8mm
flat washers (D) and the tool rest (J) into the
wheel housing (M).
The tool rests should be adjusted to within
1/16" of the grinding wheel or other accessories
being used. As the whee l wears down, the to ol
rest must be re-adjusted to maintain a 1/16"
clearance.
Figure 2
To install eye shields (refer to Figure 2):
Insert two M5 x 10 pan head screws (H) through
the mounting plate (A
plate (G) containing threaded mounting holes.
Tighten the screws (H).
), eye shield (C), and bracket
2
6.5 Mounting the Grinder
To prevent the grinder from moving during
operation, it should be s ecurely mounted to a wor k
surface or grinder stand.
1. Align the mounting holes on the grinder with
predrilled holes in a bench or grinder stand.
2. Insert bolts through the holes and tighten, using
washers and nuts (not included).
2. Install the right tool rest in the same manner.
6.4 Eye Shields
Refer to Figure 2.
Parts needed:
4 M5x10 Pan Head Screws (H)
2 Eye Shields (L)
2 Eye Shield Bracket Plates (G)
The eye shields (L) are identical and will fit on
either side of the grinder.
8
7.0 Electrical connections
7.1 GROUNDING INSTRUCTIONS
When connecting the bench grinder to the power
source outlet, the outlet must be properly
grounded to protec t the operator from electr ical
shock.
Important: The adapter illus trated i n F i g. B is f or
use only if you already have a properly
grounded two-prong receptacle. Do not modify
the plug provided-if it wil l not fit the outlet, have
the proper outlet installed by a qualified
electrician. Check with a qualified electrician or
service personnel if the grounding instructions
are not completel y understood, or if in doubt as
to whether the tool is properly grounded.
In the event of a malfunction or breakdown,
grounding provides a path of least res istance f or
electrical current to reduce the risk of electrical
shock. This m achine is eq uipp ed wit h an elec tric
cord having an equipment-groundin g conductoroutlet that is properly insta lled and grounded in
accordance with all local codes and ordinances.
This grinder is equipped with a power cord.
Improper connection of the equipment groundin g
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 equipm ent -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.
Plug power cord into a 110-120V properly
grounded outlet protected by a 15-am p fuse or
circuit breaker.
Do not touch the prongs of
the power cord plug when plugging or
unplugging to or from an outlet.
If improperly grounded, this
power tool can cause serious injury from
electrical shock, particularly when used in
damp locations or near plumbing. If an
electrical shock occur s, there is t he potenti al
of a secondary hazard such as your hands
coming in contact involuntarily with the
rotating grinder.
The JBG series bench grinders are rated at
120V, 1PH. These grin ders are des igned f or us e
on a circuit with an outlet that looks the one
shown in Fig. A. and have a grounding prong,
also shown in Fi g. A. A temporar y adapter (Fig.
B) may be used to connect the plug to a twoprong receptacle (F ig. B) if a properly grounded
outlet is not available. A temporary adapter
should only be used until a properly grounded
outlet can be insta lled by a qualified electrician.
This adapter is not applicable in Canada. The
green colored lu g must be fastened t o the cov er
plate screw.
Before plugging into the
power source, be sure that power switch is
in the OFF position.
7.2 Extension Cords
Use only three-wire extension cords that have
three-prong grounding type plugs and threeprong receptacles that accept the tool's plug.
Replace or repair damaged or worn core
immediately.
USE PROPER EXTENSIO N CORD. Make sure
your extension cord is good condition. When
using an extension cord, be sure to use one
heavy enough to carr y the current your product
will draw. An unders ized cord will cause a dr op
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 num ber, the he avier
the cord.
Volts Total length of cord in feet
Amp
Rating
0 – 06
6 – 10
10 – 12
12 – 16
120V 25 50 100 150
AWG
18
16
18
16
14
16
16
12
16
14
14
not rcmd
14
12
12
not rcmd
Table 1
9
8.0 Operation
9.0 Adjustments
A bench grinder is designed for hand-grinding
operations such as sharpening chisels,
screwdrivers, drill bits, removing excess metal,
and smoothing metal surfaces.
A Medium Grain Abrasive Grinding Wheel is
suitable for rough grind ing where a consi derable
amount of metal must be removed or when
obtaining a smooth finish is not important.
A Fine Grain Abrasive Grinding Wheel should be
used for sharpening tools of grinding to close
size tolerances beca use it removes metal mor e
gradually for prec ision gri ndin g and giv es work a
smooth finish.
Always use approved safety
glasses or face shields! Failure to comply
may cause serious injury!
8.1 Switch
The switch is located on t he front of the grinder
near the bottom. To turn the tool on, press the
rocker switch at the top near the word ON. To
turn the tool off, press the bottom part of the
rocker switch near the word OFF.
9.1 Eye Shield Tilt Adjustment
1. Loosen lock knob (A1, Fig. 3).
2. Adjust eye shield to the desired tilt
angle (A
, Fig. 3).
2
9.2 Spark Guard
As the wheel wears down, the spark guards
must be re-adjusted to maintain a 1/16"
distance.
To adjust:
1. Loosen two hex cap s crews (B
a 10mm wrench.
2. Slide the spark guard (B
distance from the grinding wheel surface.
3. Tighten screw (B
, Fig. 3).
1
, Fig. 3) with
1
, Fig. 3) to 1/16"
2
8.2 Precautions
Before starting the grinder, turn the wheels by
hand making sure th ey are clear of obstructions
and that they turn freely. The tool rests and
spark guards should not touch the wheel.
Turn on the grinder and allow it to reach full
running speed before starting to grind.
Keep a steady, moderate pressure on the
workpiece and keep it m oving at an even pace
for smooth grinding. Pressing too hard
overheats the motor and prematurely wears
down the grinding wheels. Note the original
bevel angle on the item to be sharp ened and try
to maintain the sam e shape. The grind ing wheel
should rotate into the object being sharpened.
Keep a tray filled with water and dip your work
into in regularly to prevent overheating.
Overheating can weaken metals.
Do not use the side of the grinding wheel; this
puts dangerous stress on the wheel.
When the wheel becom es loaded or du ll, use an
approved grinding wheel dresser and dress the
wheel face.
Keep the tool rest and spark guard to within
1/16" of the grinding wheel. See the Adjustment
section to adjust.
Figure 3
9.3 Tool Rest
As the wheel wears d o wn, the tool rests m us t be
re-adjusted to maintain a 1/16" distance.
1. Loosen two hex ca p screws (C
a 12mm wrench.
2. Slide the tool rest ( C
, Fig. 3) to a distanc e
2
of 1/16" from the grinding wheel.
3. Tighten screws (C
, Fig. 3).
1
, Fig. 3) with
1
10
10.0 User-maintenance
For safety, turn the switch to OFF and remove
plug from the power source outlet before
adjusting and maintaining the bench grinder. If
the power cord is worn, cut or damaged in any
way, have it replaced immediately.
10.1 Ring Test
Before replacing a grinding wheel, perform this
simple test on the replacement wheel:
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 piec e of s crap wood or
a wooden dowel.
A good wheel will "ring"; a defective wheel will
"thud". Discard any wheel that does not "ring".
An internal defect m a y not be a pparent by visual
inspection alone. T he ring test may uncover an
internal crack or void.
The use of any other
accessory is not recommended and may
result in serious injury!
To change a wheel (refer to Figure 4):
1. Disconnect grinder from the power source.
2. Loosen the spark guard (A) and too l rest (B)
(refer to the Adjus tment s ection on page 11)
and move the spark guard and tool rest
away from the wheel.
3. Remove the guar d cover using a Phillips or
flathead screwdriver.
4. Stabilize the wheel by holding the opposite
wheel firmly.
5. Unscrew the wheel nut (C) with a 1" wrench.
Note: Turn the locking nut on the r ight-hand
wheel counterclock wise to loosen. Turn the
locking nut on the lef t-hand wheel c lockwise
to loosen.
6. Remove the outer flange (D) and wheel (E).
10.2 Care of Grinding Wheel
In normal use, grinding wheels may become
cracked, grooved, rounded at the edges,
chipped, out of true or loaded with foreign
material.
Cracked wheels should be replaced
IMMEDIATELY. While any of the other
conditions can be remedied with a dressing tool
(available at mos t hardwar e stores) , new wheels
sometimes require dressing to make them
round.
10.3 Changing Wheels
If you must replace a wheel be sure to 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 2 to determine correct
dimensions for the replacement wheel.
Model
JBG-6B
Wheel
Diameter
6" 3/4" 1/2"
Maximum
Width
Center
Hole
7. Clean flanges. Check the flanges to make
sure they are flat. Wheel flanges that ar e not
flat will cause the wheel to wobble.
8. Put t he inner flange, whe el (E), outer flange
(D) and nut (C) on the s haf t. Tighten the nut.
Do not over tighten. This may cause the
wheel to crack.
9. Replace the guard cover. Adjust the spark
guards and tool rests to a 1/16" clearance
from the wheel (see Adjustments on
page 11).
JBG-8B
JBG-10B
Your bench grinder will accept most polishing
and buffing wheels available at dealers and
hardware stores.
8" 1" 5/8"
10" 1" 1"
Table 2
11
Figure 4
10.4 Grinding Wheels
The JET Series bench gr inders come equipped
with general purpose grinding wheels. Wheels
vary according to types of abrasive, hardness,
grit size, and structur e. JET carries a full line of
abrasive grinding, carbide grinding, tool
sharpening, and wire wheels. Cont act your local
distributor for the proper grinding wheel or wire
wheel brush for your application.
10.5 Wire Wheel Brushes
Wire brushing provides a fast way to remove
rust scale, burrs, and point 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.
10.6 Cleaning
Metal shavings may still be
hot from recent grinding operations. Make
sure shavings and debris are cold before
cleaning the grinder.
Brush all shavin gs from the motor housing, to ol
rests, and wheel guards. Check grinding wheels
for cracks and chips. Replace if damaged.
Avoid the use of the
following cleaning chemicals or solvents:
gasoline, carbon tetrachloride, chlorinated
solvents, ammonia and household
detergents containing ammonia.
10.7 Lubrication
All motor bearin gs are per manently lubr icated at
the factory and require no additional lubrication.
10.8 Additional servicing
Any additional servicing on the grinder should be
performed by an authorized service
representative.
12
11.0 Troubleshooting JBG Series Bench Grinders
Problem Probable Cause Remedy
Not plugged into receptacle Plug it into the power source receptacle
Motor will not start
Motor will not start and
fuse or circuit breaker
opens
Motor fails to develop
full power
Motor overheats
Motor stalls or slows
Frequent fuse or circuit
breaker failure
Switch not in the ON position
Motor cord cut or abraded Replace with a new cord
Plug on cord is faulty Replace with a new plug
Fuse or circuit breaker open Re-set, may be too many machines on line
Motor faulty Call JET Customer Service Department
Too many electrical machines
running on the same outlet
Incorrect fuse Try time delay fuse, or go to circuit with
Wheels cannot rotate because of
obstruction
Undersized extension cord Use correct size extension cord; see
Short circuit Cord, plug, or motor need repair; call JET
Low line voltage Check power line for proper voltage
Faulty motor or capacitor Call JET Customer Service Dept.
Overload on motor Reduce load to motor; do not press so hard
Poor ventilation for motor Unplug and clean out around motor;
Capacitor failure Call JET Customer Service Dept.
Motor overload Reduce load to motor; do not press so hard
Low line voltage Check power line for proper voltage
Loose wire connections Call JET Customer Service Dept.
Faulty motor Call JET Customer Service Dept.
Motor overload Reduce load to motor; do not press so hard
Overload of electrical circuit Too many electrical appliances on same
Incorrect fuse of circuit breaker Have electrician upgrade service to outlet
Table 3
Turn the switch to the ON position
Turn off other machines and try again
higher rated fuse of circuit breaker
Unplug and turn grinding wheel b y hand
manual
Customer Service Dept.
provide better air circulation
circuit
12.0 Replacement Parts
Replacement parts are lis ted on the fol lowing pag es. To order parts or reach our service de partm ent, 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 fas teners, can be foun d at local hard ware stores, or may be ordered f rom
JET.
Some parts are shown for reference only, and may not be available individually.
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12.1.1 JBG-B Series Grinders – Exploded View
14
12.1.2 JBG-B Series Grinders – Parts List
Index No Part No Description Size Qty
1 ............... JBG6B-001 .............. Shaft and Rotor Assembly ................................... .................................... 1
................. JBG8B-001 .............. Shaft and Rotor Assembly ................................... ..................... ............... 1
................. JBG10B-001 ............ Shaft and Rotor Assembly ................................... .................................... 1
3 ............... JBG6B-003 .............. Stator Assembly ................................................... .................................... 1
................. JBG8B-003 .............. Stator Assembly ................................................... .................................... 1
................. JBG10B-003 ............ Stator Assembly ................................................... ............... ..................... 1
5 ............... JBG6B-005 .............. Motor Housing ...................................................... .................................... 1
................. JBG8B-005 .............. Motor Housing ...................................................... .................................... 1
................. JBG10B-005 ............ Motor Housing ...................................................... .................................... 1
6 ............... JBG6B-006 .............. Base ..................................................................... .................................... 1
................. JBG8B-006 .............. Base ..................................................................... .................................... 1
................. JBG10B-006 ............ Base ..................................................................... .................................... 1
7 ............... JBG6B-007 .............. Set Screw ........................................................... M5x10 ......................... 1
................. JBG8B-007 .............. Set Screw (JBG-8/10B) ........................................ M5x16 ......................... 1
8 ............... JBG6B-008 .............. Strain Relief (JBG-6B/8B/10B)............................. .................................... 1
10 ............. JBG6B-010 .............. Fan ....................................................................... .................................... 1
................. JBG8B-010 .............. Fan ....................................................................... .................................... 1
................. JBG10B-010 ............ Fan ....................................................................... .................................... 1
11 ............. BB-6202RZ .............. Ball Bearing (JBG-6B) .......................................... 6202RZ ....................... 2
................. BB-6204RZ .............. Ball Bearing (JBG-8B) .......................................... 6204RZ ....................... 2
................. BB-6206RZ .............. Ball Bearing (JBG-10B) ........................................ 6206RZ ....................... 2
12 ............. JBG6B-012 .............. Cover .................................................................... .................................... 2
................. JBG8B-012 .............. Cover .................................................................... .................................... 2
................. JBG10B-012 ............ Cover .................................................................... .................................... 2
13 ............. JBG6B-013 .............. Wave Washer....................................................... D35 .............. ............... 1
................. JBG8B-013 .............. Wave Washer....................................................... D47 ............................ 1
................. JBG10B-013 ............ Wave Washer....................................................... D62 ............. ................ 1
15 ............. JBG6B-015 .............. Screw/Lock Washer Assembly (JBG-6B/8B/10B) …M6x20...................... 8
16 ............. JBG6B-016 .............. Inner Wheel Guard – left
................. JBG8B-016 .............. Inner Wheel Guard – left .................................... …………………………1
................. JBG10B-016 ............ Inner Wheel Guard – left……………………………. .................................. 1
17 ............. JBG6B-017 .............. Inner Wheel Guard – right
................. JBG8B-017 .............. Inner Wheel Guard – right
................. JBG10B-017 ............ Inner Wheel Guard – right
18 ............. JBG6B-018 .............. Grinding Wheel .................................................... 6” x 3/4", 36 grit ........... 1
................. JBG8B-018 .............. Grinding Wheel .................................................... 8” x 1", 36 grit .............. 1
................. 576226 ..................... Grinding Wheel .................................................... 10” x 1”, 24 grit ............ 1
19 ............. JBG6B-019 .............. Screw/Lock Washer Assembly (JBG-6B/8B/10B)…M6x18. ..................... 6
20 ............. JBG6B-020 .............. Wheel Flange (1/2" ID)......................................... Ø12.8xØ58x3mm ........ 4
................. JBG8B-020 .............. Wheel Flange (5/8" ID)......................................... Ø16xØ72x3.2mm ........ 4
................. JBG10B-020 ............ Wheel Flange (1" ID) ............................................ Ø25.5xØ85x11mm ...... 4
21 ............. JBG6B-021 .............. Grinding Wheel .................................................... 6” x 3/4", 60 grit ........... 1
................. JBG8B-021 .............. Grinding Wheel .................................................... 8” x 1", 60 grit .............. 1
................. 576228 ..................... Grinding Wheel .................................................... 10” x 1”, 46 grit ............ 1
22 ............. JBG6B-022 .............. Nut - left hand thread ........................................... M12-Left ...................... 1
................. JBG8B-022 .............. Nut - left hand thread ........................................... M16-Left ...................... 1
................. JBG10B-022 ............ Nut - left hand thread ........................................... M24-Left ...................... 1
23 ............. JBG6B-023 .............. Nut - right hand thread ......................................... M12-Right ................... 1
................. JBG8B-023 .............. Nut - right hand thread ......................................... M16-Right ................... 1
................. JBG10B-023 ............ Nut - right hand thread ......................................... M24-Right ................... 1
24 ............. JBG6B-024 .............. Outer Wheel Guard – left
................. JBG8B-024 .............. Outer Wheel Guard – left ..................................... .................................... 1
................. JBG10B-024 ............ Outer Wheel Guard – left
25 ............. JBG6B-025 .............. Outer Wheel Guard – right
................. JBG8B-025 .............. Outer Wheel Guard – right ................................... .................................... 1
................. JBG10B-025 ............ Outer Wheel Guard – right
………………….. ............ …………………………1
……………………………. .................................. .1
……………………………. .................................. .1
…………………………….. ................................. .1
…………………………….. ................................... 1
…………………………….. ................................... 1
…………………………… ................................... 1
…………………………... ................................... 1
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Index No Part No Description Size Qty
26 ............. TS-1534042 ............. Pan Head Machine Scre w (JBG-6B) ................... M6x12 ......................... 8
................. TS-1534042 ............. Pan Head Machine Scre w (JBG-8B) ................... M6x 12 ....................... 10
................. TS-1534042 ............. Pan Head Machine Scre w (JBG-10B) ................. M6x 12 ....................... 10
27 ............. JBG6B-027 .............. Tool Rest - left ...................................................... .................................... 1
................. JBG8B-027 .............. Tool Rest - left ...................................................... .................................... 1
................. JBG10B-027 ............ Tool Rest - left ...................................................... .................................... 1
28 ............. JBG6B-028 .............. Tool Rest - right ................................................... .................................... 1
................. JBG8B-028 .............. Tool Rest - right ................................................... .................................... 1
................. JBG10B-028 ............ Tool Rest - right ................................................... .................................... 1
29 ............. TS-1550061 ............. Flat Washer .......................................................... 8mm ............................ 4
30 ............. JBG6B-030 .............. Hex Bolt/Lock Washer Assembly ......................... M8x20 ......................... 4
31 ............. JBG6B-031 .............. Rubber Guide ....................................................... ............... ..................... 1
................. JBG8B-031 .............. Rubber Guide ....................................................... .................................... 1
................. JBG10B-031 ............ Rubber Guide ....................................................... .................................... 1
32 ............. JBG6B-032 .............. Cord Plate ............................................................ .................................... 1
................. JBG8B-032 .............. Cord Plate ............................................................ .................................... 1
................. JBG10B-032 ............ Cord Plate ............................................................ .................................... 1
34 ............. 5712561 ................... Pan Head Machin e Scr e w ................................... M5x8 ........................... 2
35 ............. JBG6B-035 .............. Condenser (125 VAC, 100MFD) .......................... .................................... 1
................. JBG8B-035 .............. Condenser (125 VAC, 200MFD) .......................... .................................... 1
................. JBG10B-035 ............ Condenser (125 VAC, 200MFD) .......................... .................................... 1
36 ............. JBG6B-036 .............. Bracket ................................................................. .......... .......................... 1
................. JBG8B-036 .............. Bracket ................................................................. .................................... 1
................. JBG10B-036 ............ Bracket ................................................................. .................................... 1
37 ............. JBG10B-037 ............ Self-Tapping Screw (JBG-6B only) ...................... ST3.9x12 mm ............. 2
38 ............. TS-228408 2 ............. Pan Head Machine Screw (JBG-8B & JBG-10 B) M4x8 ........................... 4
39 ............. JBG6B-039 .............. Power Cord .......................................................... .................................... 1
................. JBG8B-039 .............. Power Cord .......................................................... .................................... 1
................. JBG10B-039 ............ Power Cord .......................................................... .................................... 1
40 ............. JBG6B-040 .............. Screw/Lock Washer Assembly (JBG-6B/8B) ....... M4x8 ........................... 1
................. JBG10B-040 ............ Screw/Lock Washer Assembly (JBG-10B) .......... M5x10 ......................... 1
41 ............. JBG6B-041 .............. Star Washer (JBG6B/8B) ..................................... 4mm ............................ 1
................. JBG6B-041 .............. Star Washer (JBG10B) ........................................ 5mm ............................ 1
42 ............. JBG6B-042 .............. Screw/Lock Washer Assembly ............................ M6x18 ......................... 4
................. JBG8B-042 .............. Screw/Lock Washer Assembly (JBG-8B/10B) ..... M8x20 ......................... 4
43 ............. TS-1540021 ............. Hex Nut ............................................................... .M4 ........ ...................... 2
44 ............. JBG6B-044 .............. Switch ................................................................... .................................... 1
................. JBG8B-044 .............. Switch (w/ JBG8B-45) .......................................... .................................... 1
................. JBG10B-044 ............ Switch (w/ JBG10B-45) ........................................ .................................... 1
45 ............. JBG6B-045 .............. Switch Plate ......................................................... .................................... 1
................. JBG8B-045 .............. Switch Plate (re: JBG8B-44) ................................ .................................... 1
................. JBG10B-045 ............ Switch Plate (re: JBG10B-44) .............................. .................................... 1
46 ............. 5712561 ................... Pan Head Machin e Scr e w ................................... M5x8 ........................... 2
47 ............. JBG6B-047 .............. Base Plate ............................................................ .................................... 1
................. JBG8B-047 .............. Base Plate ............................................................ .......... .......................... 1
................. JBG10B-047 ............ Base Plate ............................................................ ........... ......................... 1
48 ............. JBG6B-048 .............. Relay (JBG6B only) ............................................. .................................... 1
................. JBG8B-048 .............. Centrifugal Start Switch ....................................... .................................... 1
................. JBG10B-048 ............ Centrifugal Start Switch ....................................... .................................... 1
49 ............. JBG6B-049 .............. Cross Screw ......................................................... M5x16 ......................... 4
50 ............. JBG6B-050 .............. Spark Guard - left. ................................................ .................................... 1
................. JBG8B-050 .............. Spark Guard - left. ................................................ .................................... 1
................. JBG10B-050 ............ Spark Guard - left. ................................................ .................................... 1
51 ............. JBG6B-051 .............. Spark Guard - right. ............................................. .................................... 1
................. JBG8B-051 .............. Spark Guard - right. ............................................. .................................... 1
................. JBG10B-051 ............ Spark Guard - right. ............................................. .................................... 1
52 ............. TS-2361061 ............. Lock Washer ........................................................ 6mm ............................ 2
53 ............. TS-1550041 ............. Flat Washer .......................................................... 6mm ............................ 6
16
Index No Part No Description Size Qty
54 ............. TS-1482021 ............. Hex Cap Screw .................................................... M6x12 ......................... 4
55 ............. JBG6B-055 .............. Eye Shield Bracket - left ....................................... .................................... 1
................. JBG8B-055 .............. Eye Shield Bracket - left ....................................... .................................... 1
................. JBG10B-055 ............ Eye Shield Bracket - left ....................................... .................................... 1
56 ............. JBG6B-056 .............. Eye Shield Bracket - right. ................................... .................................... 1
................. JBG8B-056 .............. Eye Shield Bracket - right. ................................... .................................... 1
................. JBG10B-056 ............ Eye Shield Bracket - right. ................................... .................................... 1
57 ............. JBG6B-057 .............. Lock Knob (JBG-6B/8B/10B) ............................... .................................... 2
58 ............. TS-1533032 ............. Pan Head Machine Screw ................................... M5x10 ......................... 4
59 ............. JBG6B-059 .............. Eye Shield ............................................................ .................................... 2
................. JBG6B-059LA .......... Eye Shield Assembly Left (#58Thru 60, and #55) .................................... 1
................. JBG6B-059RA ......... Eye Shield Assembly Right (#58Thru 60, and #56) .................................. 1
................. JBG8B-059 .............. Eye Shield ........................................................... .................................... 2
................. JBG8B-059LA .......... Eye Shield Assembly Left (#58Thru 60, and #55) .................................... 1
................. JBG8B-059RA ......... Eye Shield Assembly Right (#58Thru 60, and #56) .................................. 1
................. JBG10B-059 ............ Eye Shield ........................................................... .................................... 2
................. JBG10B-059LA ........ Eye Shield Assembly Left (#58Thru 60, and #55) .................................... 1
................. JBG10B-059RA ....... Eye Shield Assembly Right (#58Thru 60, and #56) .................................. 1
60 ............. JBG6B-060 .............. Eye Shield Plate (JBG-6B/8B/10B) ...................... .................................... 2
61 ............. JBG6B-061 .............. JET-92 Label Base (JBG-6B/8B) ......................... .................................... 1
................. JBG10B-061 ............ JET-113 Label Base (JBG-10B) .......................... .................................... 1
62 ............. JET-92 ..................... JET Logo (JBG-6B/8B) ........................................ 92x38mm .................... 1
................. JET-113 ................... JET Logo (JBG-10B) ............................................ 113x47mm .................. 1
63 ............. JBG6B-063 .............. Direction Label ..................................................... .................................... 2
64 ............. JBG6B-064 .............. Rubber Foot (JBG6B/8B) ..................................... .................................... 4
................. JBG10B-064 ............ Rubber Foot ......................................................... .................................... 4
65 ............. LM000345 ................ Warning Label (not shown--JBG6B/8B) ............... .................................... 1
................. LM000346 ................ Warning Label (not shown- JBG10B) .................. .................................... 1
66 ............. LM000347 ................ ID Label, JBG-6B ................................................. .................................... 1
................. LM000349 ................ ID Label, JBG-8B ................................................. .................................... 1
................. LM000352 ................ ID Label, JBG-10B ............................................... .................................... 1
67 ............. JBG6B-067 .............. Relay Box (JBG6B only) ...................................... .................................... 1
17
13.0 Electrical Connections – JBG Series Grinders
18
19
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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