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26. Maintain tools with care. Keep cutting tools 

sharp and clean for the best and safest 
performance. Follow instructions for lubricating 
and changing accessories. 

27. Turn off machine and disconnect from power 

before cleaning. Use a brush or compressed 
air to remove chips or debris — do not use 
your hands. 

28. Do not stand on the machine. Serious injury 

could occur if the machine tips over. 

29.  Never leave the machine running unattended. 

Turn power off and do not leave machine until 
it comes to a complete stop. 

30. Remove loose items and unnecessary work 

pieces from the area before starting the 
machine. 

31. Do not grind magnesium, as it may create a 

fire hazard. 

 

 

Familiarize yourself with the following safety 
notices used in this manual: 

 

This means that if precautions 

are not heeded, it may result in minor injury 
and/or possible machine damage.

 

 

This means that if precautions 

are not heeded, it may result in serious or even 
fatal injury.

 

 

 
 
 
 

 
 
 

 

 

4.0

  About this manual 

This manual is provided by JET covering the safe operation and maintenance procedures for a JET Model BG-
379 Belt Grinder. 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 instructions set forth in this document.  

This manual is not intended to be an exhaustive guide to belt grinder operational methods, stock choice, 
abrasive selection, etc.  Additional knowledge can be obtained from experienced users or trade journals. 
Whatever accepted methods are used, always make personal safety a priority. 

If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our 
web site: www.jettools.com. 

Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it. 

 

 

Summary of Contents for 414610

Page 1: ...g Instructions and Parts Manual 2 Wheel Belt Grinder 3 x 79 Model BG 379 JET 427 New Sanford Road LaVergne Tennessee 37086 Part No M 414610 Ph 800 274 6848 Revision C 01 2016 www jettools com Copyright 2015 JET ...

Page 2: ...tional 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 Appl...

Page 3: ...s 8 7 4 Voltage Conversion 3PH only 8 8 0 Adjustments 9 8 1 Belt tracking 9 8 2 Belt change 9 8 3 Belt tension adjustment 9 9 0 Operation 9 9 1 Contact grinding 9 9 2 Surface grinding 9 10 0 Maintenance 9 11 0 Troubleshooting 10 12 0 Replacement Parts 10 12 1 1 BG 379 Belt Grinders Exploded View 11 12 1 2 BG 379 Belt Grinders Exploded View 12 12 1 3 BG 379 Belt Grinders Parts List 13 13 0 Electric...

Page 4: ...y equipment such as face or dust masks that are specifically designed to filter out microscopic particles 10 Do not operate this machine while tired or under the influence of drugs alcohol or any medication 11 Make certain switch is in OFF position before connecting machine to power supply 12 Make certain machine is properly grounded 13 Make all machine adjustments or maintenance with machine unpl...

Page 5: ...ans that if precautions are not heeded it may result in serious or even fatal injury 4 0 About this manual This manual is provided by JET covering the safe operation and maintenance procedures for a JET Model BG 379 Belt Grinder This manual contains instructions on installation safety precautions general operating procedures maintenance instructions and parts breakdown Your machine has been design...

Page 6: ...op work support 6 Belt guard 7 Tracking adjustment knob 8 Belt tension release lever 9 Industrial switch with overload protection 10 Angle lock handle x2 11 Drive wheel 12 Dust port 13 Side panel 14 Pedestal 15 Base 16 Hinged guard plate 17 Tension adjustment nuts 18 Swing away safety guard ...

Page 7: ...ce With load3 88 db at 93mm 3 66 distance 88 db at 93mm 3 66 distance Dimensions and Capacities Abrasive belt size LxW 2000 x 75 mm 79 x 3 2000 x 75 mm 79 x 3 Flat grinding surface 530 mm 21 530 mm 21 Working height variable 780 1150 mm 30 3 4 45 1 4 780 1150 mm 30 3 4 45 1 4 Belt speed 40 m s 131 2 fps 40 m s 131 2 fps Contact wheel size Dia x W 200 x 75 mm 8 x 3 200 x 75 mm 8 x 3 Drive wheel siz...

Page 8: ... of electric shock Improper connection of the equipment grounding conductor can result in a risk of electric shock The conductor with insulation having an outer surface that is green with or without yellow stripes is the equipment grounding conductor If repair or replacement of the electric cord or plug is necessary do not connect the equipment grounding conductor to a live terminal Check with a q...

Page 9: ...ward counterclockwise 4 Install new belt according to direction arrows printed on belt 5 Move tension release lever 8 upward clockwise to tighten belt 6 Close side cover and reinstall spark trap 1 8 3 Belt tension adjustment Belt tension has been adjusted by the manufacturer If future adjustment is needed distance between the wheels can be changed using the two hex nuts 17 9 0 Operation 9 1 Contac...

Page 10: ...el if crown is not present Slack belt Insufficient belt tension Set tension so belt is just taut Premature wear of contact wheel Excessive belt tension Set tension so belt is just taut Grinding on one area of belt Use entire belt work surface whenever possible Excess deposits on belt debris in machine Clean or replace belt Periodically clean interior of grinder Short belt life Excessive grinding p...

Page 11: ...11 12 1 1 BG 379 Belt Grinders Exploded View ...

Page 12: ...12 12 1 2 BG 379 Belt Grinders Exploded View ...

Page 13: ...tor for 1PH 1 S 75 14 10 3 Stator for 3PH 1 14 11 S 75 14 11 Motor Canister 1 14 12 S 75 14 12 Upper Junction Box 1 14 13 S 75 14 13 Lower Junction Box 1 14 14 TS 2284082 Phillips Pan Head Machine Screw M4x8 4 14 15 S 75 14 15 1 Rotor for 1PH 1 S 75 14 15 3 Rotor for 3PH 1 14 16 S 75 14 16 Washer 1 14 17 S 75 14 17 Cover 1 14 18 BG379 14 18 Hex Bolt fully threaded M8x20 3 14 19 S 75 14 19 Centrifu...

Page 14: ...5 S 75 1035G Side Panel 1 76 BG379 76 Hex Bolt fully threaded M10x30 1 77 S 75 1009 Washer 1 78 S 75 1008 Drive Wheel 1 79 S 75 1036 Spark Trap 1 80 BG379 80 Hex Bolt fully threaded M8x15 1 82 S 75 1037 Knob 1 83 S 75 83 Adjustable Handle M12x32 1 84 BG379 84 Hex Screw M12x140 1 85 1 618M1 0216 Phillips Pan Head Machine Screw for 1PH M5x8 4 618M1 0216 Phillips Pan Head Machine Screw for 3PH M5x8 2...

Page 15: ...S 75 85 39 Cable for 1PH 0 215m 18 AWG 1 85 40 S 75 85 40 PE Cable for 1PH 0 115m 16 AWG 1 85 41 S 75 85 41 UV Cable for 1PH 12 AWG 1 85 42 S 75 85 42 Cable for 3PH 0 332m 18 AWG 1 85 43 S 75 85 43 Cable for 3PH 0 181m 18 AWG 1 85 44 S 75 85 44 Cable for 3PH 0 415m 18 AWG 1 85 45 S 75 85 45 Cable for 3PH 0 468m 18 AWG 1 85 46 S 75 85 46 Cable for 3PH 0 412m 18 AWG 1 85 47 S 75 85 47 Cable for 3PH ...

Page 16: ...16 13 0 Electrical Connections BG 379 13 1 Single phase only 13 2 3 phase only ...

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