JET 414474, 414484, 414475 User Manual

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Operating Instructions and Parts Manual

10-inch x 16-inch Miter Cut-Off Band Saw

Models: J-7020M, J-7040M, J-7040M-4

JET

427 New Sanford Road
LaVergne, Tennessee 37086 Part No. M-414474
Ph.: 800-274-6848 Revision B2 01/2015
www.jettools.com Copyright © 2015 JET

Model J-7020M show n

1

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 o f these ma chines in the processing of metal, pl asti cs, or oth er materials o utsi de recommended guideli nes m ay
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 pro of
of initia l p u rch a s e whe n 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 Informa t io n

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.

2

T able of Contents

Cover Page .................................................................................................................................. 1

Warranty....................................................................................................................................... 2

T able 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

T est Cutting to V erify 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

3

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

4

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 1 10/220VAC/60Hz 220/440V AC/60Hz 460V AC/60Hz

1.5 HP/1 Phase 2 HP/3 Phase 2 HP/3 Phase
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

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 st art

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.

1 1. 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
inoperation.

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.

5

20. Some dust created by power sanding, sawing,
grinding, drilling and other construction activities
contains chemicals known to cause cancer , birth
defects or other reproductive harm. Some ex
amples of these chemicals are:

Lead from lead based paint
Crystalline silica from bricks and cement

and other masonry products, and

arsenic and chromium from chemically­ treated lumber.

21. Y our risk from those exposures varies, depending
on how often you do this type of work. To reduce
your exposure to these chemicals: work in a well
ventilated area, and work with approved safety
equipment, such as those dust masks that are
specifically designed to filter out microscopic

particles.

Conductor Length AWG (American Wire Gauge) Number

240 Volt Lines 120 Volt Lines

0 - 50 Feet No. 14 No. 14
50 - 100 Feet No. 14 No. 12

Over 100 Feet No. 12 No. 8

General Electrical Cautions

This saw should be grounded in accordance with
the National Electrical Code and local codes and
ordinances. This work should be done by a qualified
electrician. The saw should be grounded to protect
the user from electrical shock.

Wire SizesCaution:

For circuits which are far away from the electrical
service box, the wire size must be increased in order
to deliver ample voltage to the motor . T o minimize
power losses and to prevent motor overheating and
burnout, the use of wire sizes for branch circuits or
electrical extension cords according to the following
table is recommended.

Safety Instructions on Sawing Systems

1. Always wear leather gloves when handling saw
blade. The operator shall not wear gloves when
operating the machine.

2. All doors shall be closed, all panels replaced, and
other safety guards in place prior to the machine
being started or operated.

3. Be sure that the blade is not in contact with the
workpiece when the motor is started. The motor
shall be started and you should allow the saw to
come up to full speed before bringing the saw
blade into contact with the workpiece.

4. Keep hands away from the blade area. See

Figure A.

6

5. Remove any cut off piece carefully while keeping
your hands free of the blade area.

6. Saw must be stopped and electrical supply must
be cut off before any blade replacement or
adjustment of blade support mechanism is done,
or before any attempt is made to change the
drive belts or before any periodic service or
maintenance is performed on the saw.

7. Remove loose items and unnecessary
workpieces from area before starting machine.

A

B

8. Bring adjustable saw guides and guards as close
as possible to the workpiece.

9. Always wear protective eye wear when operating,
servicing, or adjusting machinery . Eyewear shall
be impact resistant, protective safety glasses
with side shields complying 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. See Figure B.

10. Nonslip footwear and safety shoes are recom­mended. See Figure C.

1 1. Wear ear protectors (plugs or muffs) during

extended periods of operation. See Figure D.

12. The workpiece, or part being sawed, must be se ­curely clamped before the saw blade enters t he
workpiece.

13. Remove cut off pieces carefully , keeping hands
away from saw blade.

14. Saw must be stopped and electrical supply cut
off or machine unplugged before reaching into
cutting area.

15. A void contact with coolant, especially guarding
your eyes.

C

D

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

T able
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.

7

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 SA W MOTOR
MUST BE OPERA TING .

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. S peed
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 T ensioning
Hand Wheel

Work Stop
Attachment

Blade Guide
Supports

Saw Head
Feed Rate
Control

Head Pivot Point

Saw
Head

Speed
Control

8

Figure 5: Controls

V ariable S peed Adjustment From 100 FPM TO 350 MPM

Recommended S peed for Cutting V arious Materials

SPEED/FP M Material To Be Cut

100 Tool S teel, S tainless Steel, Alloy S teel, 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 of fers 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
(567401 1) 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.

9