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  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.)  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.  Do not operate this machine while tired or under 

the  influence  of  drugs,  alcohol  or  any 
medication. 

11.  Make certain the switch is in the OFF position 

before  connecting  the  machine  to  the  power 
supply. 

12.  Make certain the machine is properly grounded. 

13.  Make all machine adjustments or maintenance 

with  the  machine  unplugged  from  the  power 
source. 

14.  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.  

15.  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. 

16.  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. 

17.  Provide  for  adequate  space  surrounding  work 

area and non-glare, overhead lighting. 

18.  Keep  the  floor  around  the  machine  clean  and 

free of scrap material, oil and grease. 

19.  Keep  visitors  a  safe  distance  from  the  work 

area. Keep children away. 

20.  Make your workshop child proof with padlocks, 

master switches or by removing starter keys. 

21.  Give  your  work  undivided  attention.  Looking 

around, carrying on a conversation and “horse-
play” are careless acts that can result in serious 
injury. 

22.  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. 

23.  Disconnect grinder before servicing and before 

changing wheels. 

24.  Use  recommended  accessories.  The  use  of 

improper accessories may cause risk of injury 
to persons.  

25.  Turn  off  the  machine  before  cleaning.  Use  a 

brush to remove chips or debris — do not use 
bare hands. 

26.  Never  leave  the  grinder  running  unattended. 

Turn power off and do not leave machine until 
wheels come to a complete stop. 

Summary of Contents for JBG-W Series

Page 1: ...uctions and Parts Manual JBG W Series Grinder with Wire Wheel Models JBG 6W JBG 8W JET 427 New Sanford Road LaVergne Tennessee 37086 Part No M 577126 Ph 800 274 6848 Edition 3 11 2018 www jettools com Copyright 2018 JET ...

Page 2: ...he OFF position before connecting the machine to the power supply 12 Make certain the machine is properly grounded 13 Make all machine adjustments or maintenance with the machine unplugged from the power source 14 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 15 Keep safety guards in place at al...

Page 3: ...l RPM before starting the grinding operation 41 Do not crowd the work so that the wheel slows 42 Tool rest 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 on the grinding wheel as these may pose a fire safety hazard 45 Use only the flanges that are fu...

Page 4: ...0 6 1 GROUNDING INSTRUCTIONS 10 6 2 Extension cords 10 7 0 Operation 11 7 1 On Off Switch 11 7 2 Precautions 11 8 0 Adjustments 11 8 1 Eye Shield Tilt Adjustment 11 8 2 Spark Guard 11 8 3 Tool Rest 12 9 0 User maintenance 12 9 1 Ring Test 12 9 2 Care of Grinding Wheels 12 9 3 Changing Wheels 12 9 4 Wheel balancing 13 9 5 Dressing the wheels 13 9 6 Cleaning 14 9 7 Lubrication 14 9 8 Additional serv...

Page 5: ...ier 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 mail in card provided or register online http www jettoo...

Page 6: ...1 2 in 5 8 in Wire wheel size O D x width x bore 6 x 1 2 x 1 2 in 8 x 1 2 x 5 8 in Wire wheel material Steel wire with plated copper Wheel flange diameter 2 in 50 8 mm 2 3 4 in 70 mm Wheel speed 3 450 RPM Arbor nut maximum tightening torque 20 lbf ft 270kgf cm Tool rest distance to wheel adjustable Main materials Arbor steel Base cast iron Motor housing cast iron Inner wheel guard cast iron Outer ...

Page 7: ...ons 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 O D outside diameter CFM cubic 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 noti...

Page 8: ...N 1 Tool rest left O 1 Tool rest right P 2 Eye shields R 1 Operating Instructions and Parts Manual 1 Product registration card 5 3 Tools required for assembly 10mm and 12mm or adjustable wrench 1 or 2 cross point Phillips screwdriver The JBG W series Grinder requires only assembly of eye shields and tool rests Additional tools may be needed for fastening the grinder to a workbench or stand For you...

Page 9: ...eft spark guard and mounting bracket assembly to left wheel housing with two 1 4 x 3 8 hex cap screws L and two 1 4 flat washers M 2 The spark guard A1 should be adjusted to within 1 16 of the grinding wheel surface or other accessory being used As the wheel wears down the spark guard must be re adjusted to maintain this 1 16 distance 3 Install right spark guard and mounting bracket in similar man...

Page 10: ... 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 intende...

Page 11: ... should not touch the wheel 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 shields 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 No...

Page 12: ...o 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 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 o...

Page 13: ... 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 complet...

Page 14: ...on tetrachloride chlorinated solvents ammonia and household detergents containing ammonia Brush all shavings from motor housing tool rest and wheel guard Check grinding wheel for cracks and chips Replace if damaged 9 7 Lubrication All motor bearings are permanently lubricated and sealed at the factory and require no additional lubrication 9 8 Additional servicing Any other servicing should be perf...

Page 15: ...ensure free movement Clear any obstructions and restart Undersized extension cord Use correct size extension cord Short circuit in line cord or plug Inspect cord or plug for damaged insulation and shorted wires Short circuit in motor or loose connections Inspect all connections on motor for loose or shorted terminals or worn insulation Motor fails to develop full power Low line voltage Check power...

Page 16: ...er machines and try again Use dedicated circuit if needed Incorrect fuse or circuit breaker Have electrician upgrade service to outlet Excessive vibration Wheel s out of balance wobbling or not rotating concentric to arbor Dress wheel or replace it Adjust wheel imbalance according to instructions in this manual Improper mounting Secure grinder firmly to bench or stand WARNING Some corrections may ...

Page 17: ...r 3 in to 2 in 414812 0 6M Hose Heat Resistant ø2 x 24 4 in 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 ...

Page 18: ...18 12 1 1 JBG W series Grinder with Wire Wheel Exploded View ...

Page 19: ... 1 576223 Grinding Wheel 8 x 1 36 grit 1 21A JBG6W 21A Wire Wheel 6 x 1 2 1 JBG8W 21A Wire Wheel 8 x 1 2 1 22 JBG6A 22 Nut left hand thread 1 2 1 JBG8A 22 Nut left hand thread 5 8 1 23 JBG6A 23 Nut right hand thread 1 2 1 JBG8A 23 Nut right hand thread 5 8 1 24 JBG6A 24B Outer Wheel Guard left 1 JBG8A 24P Outer Wheel Guard left 1 25 JBG6A 25B Outer Wheel Guard right 1 JBG8A 25P Outer Wheel Guard r...

Page 20: ... 54 Cross Screw 1 4 x 1 2 2 54A JBG6A 54 Cross Screw 1 4 x 3 8 4 55 JBG8A 55 Eye Shield Bracket left 1 56 JBG8A 56 Eye Shield Bracket right 1 57 JBG6A 57 Lock Knob 1 4 2 58 JBG6A 58 Cross Screw 3 16 x 3 8 4 59 JBG8A 59 Eye Shield 2 JBG8A 59A Eye Shield Assembly includes 50 thru 60 LH and RH sets 1 60 JBG8A 60 Eye Shield Plate 2 61 LM000335 Identification Label JBG 6W 1 LM000336 Identification Labe...

Page 21: ...21 13 0 Wiring Diagram for JBG 6W JBG 8W Grinders ...

Page 22: ...itional 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 App...

Page 23: ...23 ...

Page 24: ...24 427 New Sanford Road LaVergne Tennessee 37086 Phone 800 274 6848 www jettools com ...

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