Jet Tools J-7060 User Manual
Operating Instructions and Parts Manual
20-Inch x 20-Inch Semi Automatic
Horizontal Cut-Off Band Saw
Model: J-7060
WHM TOOL GROUP, Inc.
427 New Sanford Road
LaVergne, Tennessee 30786 Part No. M-414476
Ph.: 800-274-6848 Revision A2 03/09
www.wmhtoolgroup.com Copyright © 2009 WMH Tool Group, Inc.
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®
Table of Contents
Cover Page........................................................................................................................... 1
General Specifications ..........................................................................................................4
Operating Precautions .......................................................................................................... 5
Operating Instructions ........................................................................................................... 7
Blade Selection/Break-in Procedures.................................................................................... 9
Work Set-up ....................................................................................................................... 10
Adjustments .........................................................................................................................11
Maintenance ....................................................................................................................... 14
Wiring Diagram ................................................................................................................... 19
Troubleshooting .................................................................................................................. 20
Replacement Parts ............................................................................................................. 22
3
General
Specifications
The JET J-7060 Semi-Automatic Horizontal Cut-Off
Band Saw incorporates a number of exclusive design
features and innovations to make this saw a powerful
and productive addition to machine shops, maintenance shops, tool rooms, and fabrication and welding
shops. The exclusive swivel control panel allows the
operator access to all machine controls from any side
of the machine. The exclusive 6-point contact blade
guide assemblies give the machine greater accuracy
and longer blade life. The rapid acting, patented, 3jaw vise provides simple, fast, and accurate set-ups
for both straight and miter cuts. In addition, the semiautomatic cycle enables the operator to initiate, with
the push of a button, the following steps: blade start,
saw head frame down, blade stop, and saw head
frame up. This completely versatile band saw is a
proven time saver, offering optimum sawing performance.
Specifications
Model J-7060
Stock Number 414476
Cutting Capacity
At 90 degrees 12 inches Round/12 x 35 inches Rectangle
At 45 degrees 12 inches Round/12 x 12 inches Rectangle
4
Blade Size 1 x 0.035 x 156 inches
Blade Wheel Diameter 17 inches Diameter, Cast Iron
Blade Speeds 82 to 262 SFPM, Variable Speed
Motor 3 HP, 3 Phase, 230/460 Volts
Dimensions 87 x 31.5 x 53 Inches
Net Weight 1,144 pounds
Shipping Weight 1,279 pounds
- 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 Corporation.
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’s 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 ma-
chine.
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.
maintenance is done on the machine, electrical power to the machine must be discon-
9. Maintain all machine tools with care. Follow
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
12. Never brush away chips while the machine is
13. Keep work area clean. Cluttered areas invite
14. Remove adjusting keys and wrenches before
15. Use the right tool. Don’t force a tool or attach-
16. Use only recommended accessories and
17. Keep hands in sight and clear of all moving
18. All visitors should be kept at a safe distance
Whenever changing accessories or general
nected before work is done.
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.
5
your hands and it frees both hands to operate
the machine.
in operation.
accidents.
turning machine on.
ment to do a job it was not designed for.
follow manufacturers instructions pertaining to
them.
parts and cutting surfaces.
from the work area. Make the workshop completely safe by using padlocks, master
switches, or by removing starter keys.
General Electrical Cautions
19. Know the tool you are using — its application,
limitations, and potential hazards.
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 Sizes
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
Caution: 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.
To 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.
5. Remove any cut off piece carefully while keeping
6
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.
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.
11. Wear ear protectors (plugs or muffs) during
extended periods of operation. See Figure D.
12. The workpiece, or part being sawed, must be
securely clamped before the saw blade enters
the 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. Avoid contact with coolant, especially guarding
your eyes.
A
B
C
D
Introduction
This manual includes operating and maintenance
instructions for the JET 12-inch by 20-inch Cut Off
Band Saw, Model J-7060. This manual also includes
parts listings and illustrations of replaceable parts.
Cut-Off Saw Features
Refer to Figure 1 and 2 for cut-off saw features
Operating Instructions
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.
Blade Wheel Cover
Control
Panel
Blade Guides
Blade Guide Supports
Saw
Blade
Base
Coolant
Temperature
Figure 1: Saw Features (Front View)
Drive
Motor
Hydraulic Pump
and Reservoir
Hydraulic
Cylinder
Electrical
Panel
Saw
Head
Blade
Tension
Handwheel
Work Table
Figure 2: Saw Features (Rear View)
Blade
Speed
Control
Coolant Sump
Access Panel
Coolant
Overflow
Vise
Handwheel
Coolant
Pump
Access
Panel
Power-on
Light
Start
Switch
Stop
Switch
Saw Head Up
Emergency Stop
Coolant Pump Switch
Saw Head Down
0
0
1
10
9
2
8
3
4
7
5
6
Capped Openings
(Non-functional)
Feed Rate
Knob
Figure 3: Control panel
The upper row of controls include the following:
1. Power On light indicates when power is connected to the machine.
2. Saw Head Up pushbutton is used to raise the
head.
3. Saw Head Down pushbutton is used to lower the
head onto the workpiece.
The center row of controls include the following:
1. Start pushbutton is used to start the saw blade
drive motor and the hydraulic pump motor. The
hydraulic pump provides the hydraulic pressure
required to raise and lower the saw head.
2. Feed Rate control is used to set the rate at which
the blade feeds through the workpiece.
7
Variable Speed Adjustment From
25 MPM TO 75 MPM
Recommended Speed for Cutting Various Materials
SPEED/MPM Material To Be Cut
25 Tool Steel, Stainless Steel, Alloy Steel, Phosphor
Bronze, Hard Bronze, Hard Cast Iron, Malleable Iron.
40
50 Soft Brasses and Bronzes, Hard Aluminum, Plastics
75
Mild Steel, Soft Cast Iron, Medium Hard
Brass, Medium Hard Bron
Plastics, Soft and Medium Soft Aluminum,
Wood, Other Light Materials
The bottom row of controls include the following:
1. Stop pushbutton is used to stop the saw blade
drive motor.
2. Emergency stop pushbutton is used to quickly
disconnect electrical power to the machine.
3. Coolant On/Off selector switch is used to start
and stop the coolant pump motor.
WARNING: TO CHANGE SPEED, THE SAW
MOTOR MUST BE OPERATING.
5. Turn the speed adjustment knob to the desired
rate setting as determined by the material being
cut.
Raising/Lowering the Saw
Other Controls
Refer to Figures 1 and 2 for location of the following
controls:
1. Drive motor speed control: used to set drive
motor speed in meters per minute.
2. Blade guide support adjustment: used to set
distance between the saw blade guide bearing as
required by the size of the workpiece.
3. Blade tensioning hand wheel: use to tighten the
saw blade on the drive and idler wheels.
4. Vise clamping hand wheel: used to tighten the
vise jaws against the workpiece.
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)
Head
1. To raise the saw head, press the Saw Head Up
pushbutton. The saw head will raise until the
upper limit switch (refer to Figure 4) trips.
2. To lower the saw head, press the Saw Head
Down pushbutton. The saw head will lower until
the lower limit switch trips.
3. When the saw head is being lowered to cut a
workpiece, the saw blade drive motor must be
started before lowering the blade against the
workpiece. Set the coolant pump selector to the
on ( I ) position If coolant is required by the
material being cut.
Upper
Limit
Switch
Lock
Handle
Scale
)
T
(
F
2
1
1
1
0
1
9
8
7
6
5
4
3
2
1
0
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 and meters
per minute. (The meters per minute values are
shown in parenthesis on the indicator.) The
graduations are:
Hydraulic
Cylinder
Lower
Limit
Switch
8
Feet per Minute Meters per Minute
70 (21)
100 (30)
130 (40)
Lower
Limit
Stop
160 (48)
Figure 4: Limit Switches
4. The feed rates on the placard are expressed in
meters 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 25 meters per minute, the indicator
would be set about midway between 21 metersper-minute and the 30 meters-per-minute graduations.
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 on the
control panel to provide the operator with a means to
control the speed and efficiency of the cutting operation.
The hydraulic cylinder is attached to the saw base
and the saw head. Hydraulic pressure is provided to
both sides of the hydraulic cylinder piston to raise
and lower the saw head. The feed rate control on the
control panel determines the rate at which the saw
head is raised or lowered.
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 to
maintain cutting efficiency. 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
(5512107) and a 6/10 vari tooth bi-metal blade
(5512108) are available from JET.
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 JETsupplied 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.
5. When the blade has completed about 1/3 of the
cut, increase the feed rate. Watch the chip
formation until cutting is at its most efficient rate
and allow the saw to complete the cut (see
Evaluating Blade Efficiency). The blade is now
considered ready for regular service.
9
See Setting Blade Speed for the speeds recom-
mended for various materials. These selections, while
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