Jet 414478 - User Manual

6 4.0 About this machine and manual The JET Models J-7020 and J-7040 Horizontal Cut-Off Band Saws are ruggedly built, precision-oriented machines designed for either wet or dry applications. The 2-horsepower motor along with the worm gear reduction drive train in an oil bath, transmits smooth and po...

8 6.0 Machine setup The saw delivered to you has been adjusted at the factory. A number of test pieces have been cut using the saw to verify the accuracy of cutting. Therefore, the only setup operations required before releasing the saw for service are spotting the saw and establishing the electrica...

9 knob is turned counterclockwise. Speed decreases when the knob is turned clockwise. 2. A placard on the drive belt guard 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 p...

10 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 color...

11 vise jaw. Put the rear end of the workpiece against the angle-setting block. 4. Turn clamping hand wheel clockwise until the left vise jaw is parallel with the workpiece. Tighten the pivot screw and angle locking screw on the left vise jaw. Clamp the workpiece in position. 5. After completing the...

12 7. DO NOT DROP THE SAW HEAD OR FORCE THE CUT. Let the weight of the saw head provide the cutting force. 8. The saw will automatically shut off at the end of the cut. 10.1 Coolant flow The coolant pump must be submerged before operating to prevent damage to the pump. 1. The blade guides are fitted...

13 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 pa...

14 (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. When the adjustment...

15 12.2 Lubrication Lubricate the following components at the specified frequencies and using the lubricants as defined: 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 re...

17 12.10 Replacing carbide blade guide Refer to Figure 17. 1. Remove the cap screw and remove the carbide guide. Discard the carbide guide. 2. Install the replacement carbide guide on the guide bearing support. Install the cap screw. Set the guide so it just contacts the side of the saw blade. 3. Us...

19 Symptom Possible Cause Correction Unusual wear on side/back of blade Blade guides worn Replace blade guides. Blade guide bearings not adjusted. Adjust blade guide bearings. Blade guide bearing bracket is loose. Tighten blade guide bearing bracket. Teeth missing/ripped from blade Blade tooth pitch...

28 15.0 Electrical Connections 15.1 Electrical Connections – single phase only (model J-7020) Figure 20: Model J-7020 wiring diagram Figure 21: Connection diagram for 1PH motor