JET 414476-4 User Manual

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Operating Instructions and Parts Manual

20-inch x 20-inch Semi-Automatic Band Saw

Model J-7060

JET

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 ma chin es in the pro cessi ng of metal, plastics, or other m aterials may v oid the warrant y. The exc eptions 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 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 S tate 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; 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.

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

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

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.

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 removed.

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.

maintenance is done on the machine, electri- cal 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.

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

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.

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

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.

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.

50 Soft Brasses and Bronzes, Hard Aluminum, Plastics

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

)

(

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

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.

See Setting Blade Speed for the speeds recom- mended for various materials. These selections, while

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