Operating Instructions and Parts Manual 10-Inch x 16-Inch Horizontal Band Saw Models: J-7020, J-7040 Model J-7020 shown WHM TOOL GROUP, Inc. 427 New Sanford Road LaVergne, Tennessee 30786 Ph.: 800-274-6848 www.wmhtoolgroup.com Part No. M-414472 Revision A2 04/09 Copyright © 2009 WMH Tool Group, Inc.
Warranty and Service WMH Tool Group, Inc., warrants every product it sells. If one of our tools needs service or repair, one of our Authorized Service Centers located throughout the United States can give you quick service. In most cases, any of these WMH Tool Group Authorized Service Centers can authorize warranty repair, assist you in obtaining parts, or perform routine maintenance and major repair on your JET® tools. For the name of an Authorized Service Center in your area call 1-800-274-6848.
Table of Contents General Specifications ........................................................................................................................................ 4 Specifications ..................................................................................................................................................... 4 Machinery General Safety Warnings ..................................................................................................................
General Specifications Model J-7020 J-7040 Stock Number 414472 414478 The JET Models J-7020/J-7040 Horizontal Cut-Off Bandsaws are ruggedly built, precision machines designed for either wet or dry applications. The 2 HP motor along with the worm gear reduction drive train in an oil bath, transmits smooth and positivepower to the blade. This drive system coupled with the recirculating coolant system keeps the blade running cool and true, which results in longer blade life.
- 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 securely anchored to the floor or the work bench. When Using Machine: - Always wear safety glasses with side shields (See ANSI Z87.
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. Conductor Length 0 - 50 Feet 50 - 100 Feet Over 100 Feet Wire Sizes 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.
Introduction This manual includes the operating and maintenance instructions for the JET 10-inch by 16-inch Cut Off Band Saw, Models J-7020/J-7040. This manual also includes parts listings and illustrations of replaceable parts. 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.
Raising/Lowering the 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. 3. To adjust the feed rate, adjust the feed rate control valve knob on the top of the saw head (see figure 3). 4. To lower the saw head with power off, pull and turn the red knob (manual override) on the electro-magnetic valve (see figure 4).
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.
Angle Setting Block place it against the work piece. Set Workpiece Against Corner of Right Vise Jaw Starting the Saw Left Vise Jaw Pivot Screw Angle Locking Screw WARNING: NEVER OPERATE THE SAW WITHOUT BLADE COVERS IN PLACE AND SECURED. CAUTION: MAKE SURE THE BLADE IS NOT IN CONTACT WITH THE WORKPIECE WHEN THE MOTOR IS STARTED. DO NOT DROP THE SAW HEAD ON THE WORKPIECE OR FORCE THE SAW BLADE THROUGH THE WORKPIECE.
Coolant Flow CAUTION: THE COOLANT PUMP MUST BE SUBMERGED BEFORE OPERATING TO PREVENT DAMAGE TO THE PUMP. 1. The blade guides are fitted with coolant fittings. Coolant is provided to the fittings through interconnecting tubing. The coolant is dispensed directly onto the saw blade. 2. Adjust the coolant flow valves on the top, rear of the saw head as required to provide the desired flow. The flow should be no more than the blade can draw into the workpiece by blade movement. 3.
the wheel shoulder. Put a 6-inch length of paper between the blade and the wheel as shown in figure 11. The paper should not be cut as it passes between the wheel shoulder and the blade. 9. Turn the single hex adjustment screw a small amount. Repeat the insertion of the paper between the wheel shoulder and the blade until the paper is cut in two pieces. NOTE: You may have to repeat the check with the paper several times before the blade and the shoulder cuts the paper into two pieces.
the center locking screw with an Allen wrench (see figure 12). 4. Position the bearing by turning the bushing. Set the clearance at approximately 0.001 inch. (The blade should be in a vertical position between the bearings. (See figure 13.) 5. Tighten the center locking screw with an Allen wrench while holding the eccentric bushing in position with the 3/4-inch wrench. 6. Use the same procedure to adjust the other guide bearing. 7.
1. Ball bearings: the bearings are lubricated and sealed—periodic lubrication is not required. 2. Blade guide bearing: the bearings are lubricated and sealed—lubrication is not required. Inspect periodically. 3. Idler wheel bushing: the bearings are lubricated and sealed—lubrication is not required. Inspect periodically. 4. Lead screw bearing housing: lubricate with light oil monthly (see exploded figure, page 21). 5. Lead screw: lubricate with light oil monthly (see exploded figure, page 21). 6.
used to adjust the amount of down force the saw head puts on the workpiece when the feed rate control valve is fully open. 1. Raise the saw arm to its full upright position and lock it in position. 2. To adjust the tension on the spring, loosen the two nuts on the threaded rod of the spring pivot post. Adjust the tension as required. 3. Tighten the two nuts against the pivot post. 4. The saw can now be returned to service.
Replacement of Guide Bearings Replacement of the Wire Brush Referring to Firgure 18, remove the cap screw from the bearing being replaced. Separate the bushing and cap screw from the bearing. Discard the bearing. 1. Loosen four knobs securing the blade cover. Lift the cover and swing it backward. 2. Remove the attaching screw, spring washer and washer. Remove and discard the brush (see figure 20). 3. Install replacement brush and secure with screw, spring washer and washer.
4. Close the blade cover and secure with four knobs. Electrical Observe the following when connecting to the power source. (The cut-off saw wiring diagrams are provided in Figures 17 and 18.) WARNING: JET RECOMMENDS THAT ANY WIRING INVOLVING HARD WIRING OF THE SAW TO A BRANCH, OR ANY CHANGE OF VOLTAGE SUPPLIED TO THE MOTOR BE PERFORMED BY A LICENSED ELECTRICIAN. 1. Make sure the saw is disconnected from the power 2. 3. 4. 5.
Figure 24: Model 7040 cut-off saw wiring diagram 18 Figure 25: Connection diagram for 3ph motor
Troubleshooting Fault Probable cause Excessive blade breakage 1. Material loose in vise. 2. Incorrect speed or feed. 3. 4. 5. 6. 7. 8. Premature blade dulling Bad cuts (out-of-square) 1. Clamp work securely. 2. Check Machinist’s Handbook for speed/feed appropriate for the material being cut. Teeth too coarse for material. 3. Check Machinist’s Handbook for recommended blade type. Incorrect blade tension. 4. Adjust blade tension to the point where the blade just does not slip on the wheel.
Troubleshooting (Continued) Blade is twisting 1. Blade is binding in the cut. 2. Blade tension too high. Unusual wear on side/back of blade 1. Blade guides worn 1. Replace blade guides. 2. Blade guide bearings not adjusted. 2. Adjust blade guide bearings. 3. Blade guide bearing bracket is loose. 3. Tighten blade guide bearing bracket. Teeth missing/ripped from blade 1. Blade tooth pitch too coarse for 1. Use blade with finer tooth pitch. workpiece. 2. Feed too slow; feed too fast. 2.
Exploded View - Base 21
Parts List - Base ITEM PART NO. NO. DESCRIPTION 1 J-5712251 Foot, Left QTY 1 ITEM NO. PART NO.
Parts List - Base ITEM PART NO. NO. 46-1 DESCRIPTION TS-0051021 Hex Cap Screw ITEM PART NO. NO.
ITEM PART NO. NO.
Exploded View - Head
Parts List - Head 26 ITEM NO. PART NO.
ITEM NO. 125A 125B 126 126-1 126-2 126-3 PART NO. DESCRIPTION 2 2 2 8 4 4 127-2 127-3 128 129 130 131 132 133 Eccentric Shaft Assy. Center Shaft Assy. Blade Guide Tung. Carb.
ITEM NO. PART NO.
WMH Tool Group, Inc. 427 New Sanford Road LaVergne, Tennessee 30786 Ph: 800-274-6848 www.wmhtoolgroup.
