Operating 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 C1 08/2018
www.jettools.com Copyright © 2015 JET
1.0 IMPORTANT SAFETY
INSTRUCTIONS
WARNING – To reduce risk of injury:
1. Read and understand the entire owner’s
manual before attempting assembly or
operation.
2. Read and understand the warnings posted on
the machine and in this manual. Failure to
comply with all of these warnings may cause
serious injury.
3. Replace the warning labels if they become
obscured or removed.
4. This belt 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 belt grinder, do
not use until proper training and knowledge
have been obtained.
5. Do not use this machine for other than its
intended use. If used for other purposes, JET,
disclaims any real or implied warranty and
holds itself harmless from any injury that may
result from that use.
6. Always wear approved safety glasses/face
shields while using this belt grinder. (Everyday
eyeglasses only have impact resistant lenses;
they are not safety glasses.) Eye wear shall be
impact resistant, protective safety glasses with
side shields which comply with ANSI Z87.1
specifications.
7. Before operating this belt grinder, remove tie,
rings, watches and other jewelry, and roll
sleeves up past the elbows. Do not wear loose
clothing, and confine long hair. Non-slip
footwear or anti-skid floor strips are
recommended. Do not wear gloves or hold the
work with a rag when grinding.
8. Wear ear protectors (plugs or muffs) during
extended periods of operation.
9. Do not operate this machine while tired or
under the influence of drugs, alcohol or any
medication.
10. Make certain switch is in OFF position before
connecting machine to power supply.
11. Make certain machine is properly grounded.
12. Make all machine adjustments or maintenance
with machine unplugged from power source.
13. 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.
14. Keep safety guards in place at all times when
machine is in use. If removed for maintenance
purposes, use extreme caution and replace
the guards immediately after maintenance is
complete.
15. The belt grinder should be secured to the floor
before using.
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 “horseplay” are careless acts that can result in
serious injury.
22. Maintain a balanced stance at all times so that
you do not fall or lean against moving parts.
Do not overreach or use excessive force to
perform any machine operation.
23. Use the right tool at the correct speed and
feed rate. Do not force a tool or attachment to
do a job for which it was not designed. The
right tool will do the job better and more safely.
24. Use recommended accessories; improper
accessories may be hazardous.
25. Maintain tools with care. Keep cutting tools
sharp and clean for the best and safest
performance. Follow instructions for lubricating
and changing accessories.
26. 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.
27. Do not stand on the machine. Serious injury
could occur if the machine tips over.
28. Never leave the machine running unattended.
Turn power off and do not leave machine until
it comes to a complete stop.
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29. Remove loose items and unnecessary work
pieces from the area before starting the
machine.
30. Do not grind magnesium, as it may create a
fire hazard.
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.
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 no t heeded, it may result in serious or even fatal
injury.
2.0 About this manual
This manual is provided by JET covering the safe operation and maintenance procedures for a JET Model BG379 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 c an 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.
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3.0 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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4.0 Table of Contents
Section Page
1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2
2.0 About this manual .......................................................................................................................................... 3
3.0 Warranty and Service ..................................................................................................................................... 4
4.0 Table of Contents ........................................................................................................................................... 5
5.0 Features ......................................................................................................................................................... 6
6.0 Specifications ................................................................................................................................................. 7
7.0 Set-Up and Assembly .................................................................................................................................... 8
7.1 Floor Diagram ............................................................................................................................................. 8
7.2 Unpacking and cleanup .............................................................................................................................. 8
7.3 Electrical Connections ................................................................................................................................ 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 Electrical Connections – BG-379 ............................................................................................................... 16
13.1 Single phase only ................................................................................................................................... 16
13.2 3-phase only ........................................................................................................................................... 16
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