Operating Instructions and Parts Manual
10-inch x 16-inch Miter Cut-Off Band Saw
Models: J-7020M, J-7040M, J-7040M-4
Model J-7020M shown
JET
427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-414474
Ph.: 800-274-6848 Revision C1 01/2018
www.jettools.com Copyright © 2015 JET
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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 Co vered
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 initia l p u rch a s e when ca lling. 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 Informa tion
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 Appli es
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; Light-Duty Air Tools
1 Year – Motors; Machine Accessories; Heavy-Duty Air Tools; Pro-Duty Air Tools
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
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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T able of Contents
Cover Page .................................................................................................................................. 1
Warranty....................................................................................................................................... 2
Table of Contents .......................................................................................................................... 3
General Specifications .................................................................................................................. 4
Warning..................................................................................................................................... 5-6
Introduction ................................................................................................................................7
Miter Cut-Off Saw Features .......................................................................................................... 7
Operating Instructions ............................................................................................................... 7
Controls ....................................................................................................................................... 7
Setting Blade Speed ..................................................................................................................... 8
Raising/Lowing Saw Head ............................................................................................................ 8
Controlling the Cut: Hydraulic Feed Control ................................................................................... 9
Evaluating cutting Efficiency .......................................................................................................... 9
Blade Selection............................................................................................................................. 9
Break-in procedures ..................................................................................................................... 9
Work Set-up.............................................................................................................................. 10
Settting Head Angle..................................................................................................................... 10
Securing Workpiece ................................................................................................................... 10
Adjusting the Vise for Angle Cuts ................................................................................................. 10
Installation and Adjustment of Work Stop ......................................................................................11
Starting the Saw ..........................................................................................................................11
Coolant Flow ...............................................................................................................................11
Coolant Mixture and Quantity ....................................................................................................... 12
Adjustments .............................................................................................................................. 12
Blade Tracking Adjustment .......................................................................................................... 12
Factory or Field Procedure.......................................................................................................... 12
Blade Guide Bearing Adjustment ................................................................................................. 13
Test Cutting to Verify Adjustment Accuracy .................................................................................. 14
Adjustment of the Limit Switch................................................................................................... 14
Maintenance ............................................................................................................................. 14
Cleaning ..................................................................................................................................... 14
Lubrication .................................................................................................................................. 15
Changing Blades ........................................................................................................................ 15
Changing the Drive Belt............................................................................................................... 15
Replacing the Drive Motor............................................................................................................ 15
Adjusting the Counterbalance Spring ........................................................................................... 15
Replacing the Drive Wheel .......................................................................................................... 16
Replacing Idler Wheel or Idler Bearing......................................................................................... 16
Adjusting the Blade Guides.......................................................................................................... 16
Replacement of Carbide Blade Guide.......................................................................................... 16
Replacement of Guide Bearings .................................................................................................. 17
Replacement of Blade Edge Bearings ......................................................................................... 17
Replacement of the Wire Brush .................................................................................................. 17
Machine Setup.......................................................................................................................... 17
Uncrating and Spotting ................................................................................................................ 17
Electrical ............................................................................................................................... 18-19
Troubleshooting.................................................................................................................. 20-21
Replacement Parts ................................................................................................................... 21
Exploded View and Partslist for Saw Base .............................................................................. 22-24
Exploded View and Partslist for Saw Head.............................................................................. 25-27
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General Specifications
The JET Model J-7020M and J-7040M Miter Cut-off Saws cover a wide variety of applications in machine shops,
maintenance shops, tool rooms, fabrication and welding shops, and almost any other application requiring a
general purpose cut-off band saw. These models offer more standard features designed to provide maximum
performance, greater accuracy and more economical operation.
The J-7020M and J-7040M models are equipped with a 45-degree swivel head mitering capability which makes
these saws ideally suited for jobs with many angle cuts and limited workshop space. The work piece remains
fixed while the head swivels to cut any angle from 0 to 45 degrees and locks with a quick acting lever.
Specifications
Model J-7020M J-7040M J-7040M-4
Stock Number 414474 414475 414484
Cutting Capacity:
Round @ 90 degree 10 Inches 10 Inches 10 Inches
Rectangle @ 90 degree 10 x14/2x16 Inches 10 x14/2x16 Inches 10 x14/2x16 Inches
Round @ 45 degree 10 Inches 10 Inches 10 Inches
Rectangle @ 45 degree 10x10 Inches 10x10 Inches 10x10 Inches
Blade Size 1x0.035x135 Inches 1x0.035x135 Inches 1x0.035x135 Inches
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Vise Rapid Acting Rapid Acting Rapid Acting
Coolant System Note 1 Note 1 Note 1
Dimensions:
Length 79 Inches 79 Inches 79 Inches
Width 31 Inches 31 Inches 31 Inches
Height 41 Inches 41 Inches 41 Inches
Weight (Net) 794 pounds 794 pounds 794 pounds
Blade Speed 100 to 350 Feet/Min. 100 to 350 Feet/Min. 100 to 350 Feet/Min
Blade Wheels 14-Inch Dia. Cast Iron 14-Inch Dia. Cast Iron 14-Inch Dia. Cast Iron
Blade Guides Adjustable, 6-point Adjustable, 6-point Adjustable, 6-point
Contact, Bearing- Contact, Bearing- Contact, Bearingand-Guide Type and-Guide Type and-Guide Type
Drive Motor 110/220VAC/60Hz 220/440VAC/60Hz 460VAC/60Hz
1.5 HP/1 Phase 2 HP/3 Phase 2 HP/3 Phase
Pre-wired 220V Pre-wired 220V
Note 1: Recirculating system consists of a 1 GPM pump in an 8-gallon reservoir. Coolant applied through the
blade guides.
- Misuse of this machine can cause serious injury.
- For safety, machine must be set up, used and
serviced properly.
- Read, understand and follow instructions in the
Operating Instructions and Parts Manual which
was shipped with your machine.
When Setting up Machine:
- Always avoid using machine in damp or poorly
lighted work areas.
- Always be sure the machine support is se-
curely anchored to the floor or the work bench.
When Using Machine:
- Always wear safety glasses with side shields
(See ANSI Z87.1)
- Never wear loose clothing or jewelry.
- Never overreach - you may slip and fall.
When Servicing Machine:
- Always disconnect the machine from its electri-
cal supply while servicing.
- Always follow instructions in Operating Instruc tions and Parts Manual when changing acces sory tools or parts.
- Never modify the machine without consulting
JET.
You - the Stationary Power Tool User - Hold
the Key to Safety.
Read and follow these simple rules for best results
and full benefits from your machine. Used properly,
JET machinery is among the best in design and
safety. However, any machine used improperly can
be rendered inefficient and unsafe. It is absolutely
mandatory that those who use our products be
properly trained in how to use them correctly. They
should read and understand the Operating Instructions
and Parts Manual as well as all labels affixed to the
machine. Failure in following all of these warnings can
cause serious injuries.
Machinery General Safety Warnings
1. 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 Z87.1specifications
could result in severe injury from breakage of
eye protection.
2. Wear proper apparel. No loose clothing or
jewelry which can get caught in moving parts.
Rubber soled footwear is recommended for
best footing.
3. Do not overreach. Failure to maintain proper
working position can cause you to fall into the
machine or cause your clothing to get caught
pulling you into the machine.
4. Keep guards in place and in proper working
order. Do not operate the machine with guards
re moved.
5. Avoid dangerous working environments. Do
not use stationary machine tools in wet or
damp locations. Keep work areas clean and
well lit.
6. Avoid accidental starts by being sure the start
switch is OFF before plugging in the machine.
7. Never leave the machine running while unat-
tended. Machine shall be shut off whenever it
is not in operation.
8. Disconnect electrical power before servicing.
Whenever changing accessories or general
maintenance is done on the machine, electri-
cal power to the machine must be disconnected before work is done.
9. Maintain all machine tools with care. Follow
all maintenance instructions for lubricating and
the changing of accessories. No attempt shall
be made to modify or have makeshift repairs
done to the machine. This not only voids the
warranty but also renders the machine unsafe.
10. Machinery must be anchored to the floor.
11. Secure work. Use clamps or a vise to hold
work, when practical. It is safer than using
your hands and it frees both hands to operate
the machine.
12. Never brush away chips while the machine is
in operation.
13. Keep work area clean. Cluttered areas invite
accidents.
14. Remove adjusting keys and wrenches before
turning machine on.
15. Use the right tool. Don’t force a tool or attachment to do a job it was not designed for.
16. Use only recommended accessories and
follow manufacturers instructions pertaining to
them.
17. Keep hands in sight and clear of all moving
parts and cutting surfaces.
18. All visitors should be kept at a safe distance
from the work area. Make the workshop completely safe by using padlocks, master
switches, or by removing starter keys.
19. Know the tool you are using - its application,
limitations, and potential hazards.
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Introduction
Operating Instructions
This manual includes the operating and maintenance
instructions for the JET 10 X 16-inch Miter Cut-Off
Saws, Models J-7020M and J-7040M. This manual
also includes parts listings and illustrations of
replaceable parts for the miter cut-off saws.
Miter Cut-Off Saw Features
Refer to Figures 1 and 2 for key features of the
Models J-7020M and J-7040M Miter Cut-Off Saw. The
miter cut-off saws are nearly identical to JET's Model
J-7020 and J-7040 cut-off saws except that they are
equipped with a 45 degree swivel head. The swivel
head provides the capability to cut material at angles
from 0 to 45 degrees. The swivel head locks and
unlocks with a quick acting lever.
Saw Head
Blade
Guides
Turn Plate
Blade Guide
Supports
Worktable
Pivot Pin
Figure 1: Key Features (Front
View)
Hydraulic Cylinder
Drive
Motor
Vise
Jaw
(Fixed)
Vise
Jaw
(Moveable)
Counterbalance spring
Work
Table
Coolant Valves
Base
Blade Cover
Coolant
Temperature
Feed Rate
Control
Saw Head
Table
Hard Stop
Belt
Cover
Speed
Control
Controls
The operating controls for the saw are provided in
a control panel on the left side of the machine. The
control panel is mounted on a pivoting tube. The
pivoting tube allows the operator to position the
control panel in a convenient location.
Power-on
Light
Motor
Pushbutton
Emergency
Reset
Button
Saw Head
Pushbutton
Figure 3: Control panel
1. A power-on light is provided on the left side of the
control panel. The power-on light indicates when
power is connected to the machine.
2. A large, emergency stop button is provided on
the control panel. The emergency stop button
provides a means to rapidly cut off electrical
power.
3. A saw motor pushbutton switch is provided to the
left of the emergency reset button. The sawmotor
pushbutton switch starts the saw motor and the
E-stop button stops the saw motor.
4. A green pushbutton switch is provided to the right
of the emergency stop pushbutton. The
pushbutton opens an electro-magnetic valve in
the hydraulic cylinder circuit. Opening the valves
allows the saw head to move downward and put
the saw blade in contact with the workpiece.
5. A red release button on the electro-magnetic
valve provides a means to lower the saw head
when power to the machine has been discon-
nected (see figure 6).
6. The rate at which the saw head moves downward
is controlled by a hydraulic feed rate control
located on the top, rear of the saw head (see
figure 5).
7. A coolant pump switch is provided on the electri-
cal equipment box on the back of the machine.
8. The quick acting swivel-head lock (refer to Figure
7) is used to release and lock the swivel-head
when making angular material cuts.
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Figure 2: Key Features (Rear View)
Coolant
Pump
Switch
Coolant Pump
Access Panel
Machine Base
4. The feed rates on the placard are expressed in
feet per minute. The feed rate graduations
available on the indicator may not match the
recommended feed rate. An approximate speed
may therefore be required. For example, to set a
speed rate of 130 feet per minute, the indicator
would be set about midway between 100 feetper-minute and 165 feet-per-minute graduations.
WARNING: TO CHANGE SPEED, THE SAW MOTOR
MUST BE OPERATING.
5. Turn the speed adjustment knob to desired
rate setting as determined by material being cut.
Figure 4: Coolant pump switch
Setting Blade Speed
1. The blade speed is controlled by an adjustment
mechanism on the right end of the saw. Speed
increases when the adjustment knob is turned
counterclockwise. Speed decreases when the
knob is turned clockwise.
2. A placard on the drive belt guard (shown below)
provides recommended speeds for various
materials.
3. A speed indicator is provided on the barrel of the
adjustment mechanism. The indicator provides
speed indications in feet per minute. (The meters
per minute values are shown in parenthesis as
following.) The graduations are:
Feet per Minute Meters per Minute
100 (30)
165 (50)
230 (70)
350 (107)
Raising/Lowering Saw Head
1. Lift the saw head using the handle on the far left
side of the saw head.
2. To lower the saw head, press the green
pushbutton on the right side of the control panel
(see figure 3).
3. To adjust the feed rate, adjust the feed rate control
valve knob on top of the saw head (see figure 5).
Control Box
Saw Head
Lift Handle
Vise Clamping
Hand Wheel
Blade Tensioning
Hand Wheel
Work Stop
Attachment
Blade Guide
Supports
Saw Head
Feed Rate
Control
Head Pivot Point
Saw
Head
Speed
Control
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Figure 5: Controls
Variable Speed Adjustment From 100 FPM TO 350 MPM
Recommended Speed for Cutting Various Materials
SPEED/FPM Material To Be Cut
100 Tool Steel, Stainless Steel, Alloy Steel, Phosphor Bronze,
Hard Bronze, Hard Cast Iron, Malleable Iron.
165 Mild Steel, Soft Cast Iron, Medium Hard Brass,
Medium Hard Bronze.
230 Soft Brasses and Bronzes, Hard Aluminum, Plastics
350 Plastics, Soft and Medium Soft Aluminum, Wood,
Other Light Materials
4. To lower the saw head with power off, pull and turn
the red knob (manual override) on the electromagnetic valve (see figure 6).
Red
Relief
Button
ElectroMagnetic
Valve
Figure 6: Lowering head with power
off
Controlling the Cut: Hydraulic Feed Control
The weight of the saw arm provides all the force
needed to move the saw blade through the workpiece.
In fact, if the full weight of the arm is allowed to make
the cut, rapid blade wear and poor cutting accuracy
will result. A hydraulic feed control is provided that
gives the operator a means to control the speed and
efficiency of cutting.
The hydraulic cylinder is attached between the
saw base and the saw head. The hydraulic cylinder
resists movement of the saw head in the downward
direction. However, the hydraulic cylinder offers no
resistance when the saw head is raised upward.
The amount of downward force can be controlled
by using the feed rate control valve. When the valve is
opened slightly, the saw head will move downward.
The further the valve is opened, the faster the saw
head will move downward.
The feed control is adjusted by the operator until
the saw is operating efficiently. This is usually
determined by observing the chip formation. (See
Evaluating Blade Efficiency for more information on
cutting efficiency.)
Evaluating Cutting Efficiency
Is the blade cutting efficiently? The best way to
determine this is to observe the chips formed by the
cutting blade.
If the chip formation is powdery, then the feed rate
is much too light, or the blade is dull.
If the chips formed are curled, but colored — that
is, either blue or straw-colored from heat generated
during the cut — then the feed rate is too high.
If the chips are slightly curled and are not colored
by heat — the blade is sufficiently sharp and is
cutting at its most efficient rate.
Blade Selection
The cut-off saw is provided with a saw blade that is
adequate for a variety of cut-off jobs on a variety of
common materials. A 4/6 vari tooth bi-metal blade
(5674011) and a 6/10 vari tooth bi-metal blade
(5674021) are available from JET.
See Setting Blade Speed for the speeds recom-
mended for various materials. These selections, while
appropriate for many shop cutting needs, do not
encompass the wide variety of blades of special
configuration (tooth pitch and set) and special alloys
for cutting unusual or exotic materials.
A coarse blade could be used for a solid steel bar
but a finer tooth blade would be used on a thin-wall
tube. In general, the blade choice is determined by
the thickness of the material; the thinner the material,
the finer the tooth pitch.
A minimum of three teeth should be on the work
piece at all times for proper cutting. The blade and
workpiece can be damaged if the teeth are so far
apart that they straddle the workpiece.
For very high production on cutting of special
materials, or to cut hard-to-cut materials such as
stainless steel, tool steel, or titanium, you can ask
your industrial distributor for more specific blade
recommendations. Also, the supplier who provides
the workpiece material should be prepared to provide
you with very specific instructions regarding the best
blade (and coolant or cutting fluid, if needed) for the
material and shape supplied.
Blade Break-in Procedures
New blades are very sharp and, therefore, have a
tooth geometry which is easily damaged if a careful
break-in procedure is not followed. Consult the blade
manufacturer’s literature for break-in of specific blades
on specific materials. However, the following procedure will be adequate for break-in of JET-supplied
blades on lower alloy ferrous materials.
1. Clamp a round section workpiece in the vise. The
workpiece should be 2 inches or larger in diam-
eter.
2. Set the saw on low speed. Start the cut with a
very light feed rate.
3. When the saw has completed 1/3 of the cut,
increase the feed rate slightly and allow the saw to
complete the cut.
4. Keep the same hydraulic cylinder setting and
begin a second cut on the same or similar
workpiece.
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