This .pdf document is bookmarked Operating Instructions and Parts Manual 36-inch Metalworking Band Saw Model VBS-3612 JET 427 New Sanford Road LaVergne, Tennessee 37086 Ph.: 800-274-6848 www.jettools.com Part No.
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.
Table of Contents Warranty and Service .............................................................................................................................. 2 Table of Contents .................................................................................................................................... 3 Warning................................................................................................................................................... 4 Introduction .....................
Warning 1. Read and understand the entire owner’s manual before attempting assembly or operation. 2. Read and understand the warnings posted on the machine and in this manual. Failure to comply with all of these warnings may cause serious injury. 3. Replace the warning labels if they become obscured or removed. 4. This band saw is designed and intended for use by properly trained and experienced personnel only.
21. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are careless acts that can result in serious injury. 22. Maintain a balanced stance at all times so that you do not fall or lean against the blade or other moving parts. Do not overreach or use excessive force to perform any machine operation. 23. Use the right tool at the correct speed and feed rate. Do not force a tool or attachment to do a job for which it was not designed.
Introduction This manual is provided by JET covering the safe operation and maintenance procedures for a JET Model VBS-3612 Band Saw. This manual contains instructions on installation, safety precautions, general operating procedures, maintenance instructions and parts breakdown. This machine has been designed and constructed to provide consistent, long-term operation if used in accordance with instructions set forth in this manual.
Features and Terminology 1 – Main Work Table 2 – Work Lamp 3 – Blade Tension Handwheel 4 – Auxiliary Work Table 5 – Variable Speed Handwheel 6 – Chip Port 7 – Gear Shift Lever 8 – Rod for Circle Cutting Attachment 9 – Guide Post Lock Knob 10 – Guide Post Raise/Lower Handwheel 11 – Blade Tracking Knob 12 – Electrical box 13 – Blade Speed readout (SFPM) 14 – Power Indicator Light 15 – Control Panel Lockout 16 – Emergency Stop Button 17 – Blade Start Button 18 – Blade Stop Button 19 – Shear 20 – Weld Switch
1 1 1 1 Unpacking Open shipping container and check for shipping damage. Report any damage immediately to your distributor and shipping agent. Do not discard any shipping material until the Band Saw is set up and running properly. Compare the contents of your container with the following parts list to make sure all parts are intact. Missing parts, if any, should be reported to your distributor. Read the instruction manual thoroughly for assembly, maintenance and safety instructions.
Installation and Assembly Tools required for assembly: Forklift with strap or chain Eye bolt (provided) Set of hex wrenches (provided) Remove all crating and plastic from around the band saw. Remove any lag screws or holding straps which secure the band saw to the wood pallet. Remove the eye bolt from the tool box, and screw it into the hole at the top of the machine. Use a forklift with a strap or chain connected to the eye bolt to lift the band saw from the pallet.
Grounding Instructions Electrical connections must be made by a qualified electrician in compliance with all relevant codes. This machine must be properly grounded to help prevent electrical shock and possible fatal injury. This machine must be grounded. In the event of a malfunction or breakdown, grounding provides a path of least resistance for electric current to reduce the risk of electric shock. Improper connection of the equipmentgrounding conductor can result in a risk of electric shock.
If the Band Saw is to be hard-wired to a panel, make sure a disconnect is available for the operator. During hard-wiring of the Band Saw, make sure the fuses have been removed or the breakers have been tripped in the circuit to which the Band Saw will be connected. Place a warning placard on the fuse holder or circuit breaker to prevent it being turned on while the machine is being wired. Converting from 230 Volt to 460 Volt (Three Phase) To convert from 230 volt to 460 volt: 1.
4. Loosen tension on the blade by turning the tension handwheel (Figure 6) to the left. 5. Remove the worn blade and install the new blade, making sure the teeth face downward where they pass through the slot in the table. 6. Use the tension handwheel to tighten the tension on the blade. 7. Proceed with “Blade Tension” and “Blade Tracking” before operating the band saw. Blade Tension Rotate blade tension handwheel to the right to increase tension on the blade, to the left to decrease tension on the blade.
IMPORTANT: These are sensitive adjustments; make them gradually and allow the blade time to react to the changes. 7. When satisfied, return the upper and lower blade guides close to the blade. 8. Close upper and lower doors. Guide Post For effective cutting and for safety’s sake, there should be a minimum amount of space between the top of the workpiece and the bottom of the blade guides.
Squaring Work Table with Blade 1. Place the table in horizontal position with “0” on the scale (Figure 11). 2. Place a machinist’s square on the table and against the blade as shown. 3. If the square is not flush against the blade, loosen the screw below the table (Figure 11) with a 26mm wrench (provided). 4. Tilt the table as needed until the square is flush with blade. Retighten the screw. 5. Make sure the pointer is set at “0” on the scale.
6. After installing new belts, make sure they are tensioned properly. Work Lamp Bulb The Work Lamp uses a 20W/120V halogen bulb. Band Saw Operation Consult “Features and Terminology” on page 7 for identification of the controls. Unlock the control panel using the provided keys. Never operate the band saw without blade covers in place and secured. Blade Break-In Procedure New blades are very sharp and, therefore, have a tooth geometry that is easily damaged if a careful break-in procedure is not followed.
3. Start the saw using the pushbutton. 4. Turn the speed setting handwheel (Figure 14) to the required speed. Turning the handwheel clockwise increases speed. Turning counterclockwise decreases speed. Rotate the speed setting handwheel only when the band saw is running. Evaluating Cutting Efficiency The best way to determine whether the blade is cutting efficiently is to observe the chips formed by the cutting. • If the chip formation is powdery, then the feed is much too light, or the blade is dull.
IMPORTANT: If a blade has been cut by using snips, the ends of the blade must be ground square before welding them together, as shown in Figure 17. Removing Teeth In fine pitched blades, one or more of the teeth on each side of the cut may need to be removed by grinding so that the weld area of the blade is uniform and the teeth will be uniformly spaced. See Figure 16. Welding Figure 17 4. Carefully clean the ends of the blade which will contact the welder jaws. Remove any dirt, oil, scale and oxide.
The welder is designed for intermittent use. Repeated welding within a short period of time may cause the welder to overheat. 12. Remove the blade from the clamps, and carefully inspect it. The spacing of the teeth should be uniform and the weld should be located in the center of the gullet. Misalignment is easily noted at this time from the weld appearance. See Figure 19 for examples of incorrect welds. 13.
If the blade is thicker at the weld than at the rest of the blade, using the blade may damage the guides. 20. When grinding, do not hit the teeth, or grind deeper than the thickness of the blade; or burn or overheat the weld area. Be sure to remove flash from the back edge of the blade. Any flash or “stub” teeth which project beyond the normal set or height of the other teeth must be ground off. Clean Up It is very important that the clamp jaws be kept clean at all times.
Gage Use the standard gage (blade thickness) except when the increased thickness of the workpiece decreases accuracy and width cannot be increased to compensate. Examples of heavy gage applications: 1. When radius cutting in thick materials. 2. When the maximum width usable on the machine still provides insufficient beam strength for the blade. (Beam strength is the blade’s resistance to compression caused by strong feeding or the type of material being cut). Pitch Pitch is measured in “teeth per inch” (T.
Variable-tooth blades combine features of the other styles. They generally offer smooth cuts and long blade life, while reducing noise and vibration. Set The term “set” refers to the way in which the saw teeth are bent or positioned. Bending the teeth creates a kerf that is wider than the back of the blade. Set patterns are usually selected depending upon the type of material that needs to be cut. Three common set patterns are shown in Figure 25.
Maintenance Before doing maintenance on the machine, disconnect it from the electrical supply by pulling out the plug or switching off the main switch! Failure to comply may cause serious injury. Use a brush to loosen accumulated chips and debris. Use a shop vacuum to remove the debris. Make sure the chip brush on the lower band wheel is properly adjusted. Lubricate the air compressor with air tool oil about every six months, or more frequently if necessary. Unscrew the cap (Figure 26) and add oil.
Speed and Pitch Chart 23
Typical Band Saw Operations 24
Troubleshooting – Operating Problems Trouble Probable Cause Remedy Blade has been improperly welded. Re-weld the blade (see pages 16-19). Blade not installed properly. Set the guide inserts closer, and increase blade tension. Feeding workpiece too forcefully. Decrease feed rate. Incorrect choice of blade. Use a proper width blade for radius or wavy line cutting. Blade tooth has improper set. File to proper set or replace blade. Not enough blade tension. Increase tension. Guide post too high.
Troubleshooting – Mechanical and Electrical Problems Trouble Machine will not start/restart or repeatedly trips circuit breaker or blows fuses. Probable Cause Remedy No incoming power. Verify machine is connected to power source. Make sure START button is pushed in completely, and the STOP button is disengaged. Cord damaged. Replace cord. Overload automatic reset has not reset.
Trouble Machine will not start/restart or repeatedly trips circuit breaker or blows fuses. Band Saw does not come up to speed. Probable Cause Remedy Motor failure. If electric motor is suspect, you have two options: Have a qualified electrician test the motor for function or remove the motor and take it to a qualified electric motor repair shop and have it tested. Miswiring of the unit. Double check to confirm all electrical connections are correct.
Troubleshooting – Welded Blade Inspection Trouble Weld is misaligned. Misaligned weld: Blade ends are overlapped. Weld breaks when used. Incomplete weld. Probable Cause Remedy Dirt or scale on clamp jaws or blade. Always keep jaws clean. Clean blade before welding. Blade ends not square. Before welding, grind cut edges of the blade until they are square. Use the shear on the band saw for square cuts. Blade ends not correctly aligned when clamped in jaws. Align the ends properly before clamping.
Troubleshooting – Welder Mechanical Problems Trouble Weld could not be made. Jaws do not move. Weld area melts when weld switch is pushed. Blade cannot be tightly clamped with the clamp jaws. Annealing doesn’t occur when the annealing button is pushed. Annealing button will not return to correct position after it is released. Grinder will not run when the Grinder switch is pushed. Probable Cause Remedy Wire connection is poor; connecting point of welding switch is bad.
Parts List: VBS-3612 Band Saw (refer to breakdowns on pages 35 and 36) Index No. Part No. Description Size Qty 1............... VBS3612-101 ..........Gear Box ............................................................................................... 1 2............... TS-0209101 .............Socket Head Cap Screw.....................................3/8”-16 x 2-1/4” ........... 4 3............... TS-0720091 .............Lock Washer ......................................................3/8" .........
Index No. Part No. Description Size Qty 56 ............. TS-0561021 .............Hex Nut ..............................................................5/16”-18...................... 4 57 ............. VBS1220M-110G .....Guide Support Housing ......................................................................... 1 58 ............. TS-0208061 .............Socket Head Cap Screw.....................................5/16”-18 x 1" ............... 4 59 ............. TS-0720081 .............Lock Washer ......
Index No. Part No. Description Size Qty 114 ........... VBS3612-1114 ........Main Drive Motor ................................................3HP 3PH .................... 1 115 ........... TS-0051051 .............Hex Cap Screw ..................................................5/16”-18 x 1" ............... 8 116 ........... VBS3612-1116 ........Motor Pulley (serial no: 13033613 and lower) .....4-1/8” A3 .................... 1 ................. VBS3612-1116N ......
Index No. Part No. Description Size Qty 170 ........... TS-1533032 .............Phillips Pan Head Machine Screw ......................M5 x 10 ................... 12 171 ........... TS-1540031 .............Hex Nut ..............................................................M5 ............................ 10 172 ........... TS-1533052 .............Phillips Pan Head Machine Screw ......................M5 x 16 ..................... 8 173 ........... VBS3612-1173 ........Hinge .............................
Index No. Part No. Description Size Qty 229 ........... TS-0209051 .............Socket Head Cap Screw.....................................3/8”-16 x 1"................. 1 230 ........... VBS2012-7080 ........Worm Gear............................................................................................ 1 231 ........... TS-0207031 .............Socket Head Cap Screw.....................................1/4”-20 x 5/8" .............. 1 232 ........... VBS2012-7090 ........Worm Gear Housing ............
VBS-3612 Band Saw 35
VBS-3612 Band Saw 36
Parts List: Welder, Shear and Work Lamp Assemblies (refer to breakdown on page 39) Index No. Part No. Description Size Qty 1............... JWG34-601..............Limit Switch ........................................................................................... 1 2............... PR-EV-6011.............Insulator ................................................................................................ 1 3............... VBS3612-203 ..........Pan Head Bolt ....................................
Index No. Part No. Description Size Qty 57 ............. PR-EV-6270.............Spacer................................................................M6 .............................. 1 58 ............. PR-EV-6280.............Grinder Wheel ....................................................................................... 1 59 ............. TS-0680021 .............Flat Washer ........................................................M6 .............................. 1 60 ............. TS-1540041 .....
Welder, Shear and Work Lamp Assemblies 39
Electrical Connections – 3Ph, 230/460V 40
Electrical Connections – 3Ph, 230/460V SB1 SB2 SB3 SB4 SB5 SA1 SA2 Weld On (White) Anneal On (Green) Emergency Stop (Red) Main Motor Off (Red) Main Motor On (Green) Grinder Motor On Work Lamp On (Black) SA4 HL EL QS SQ1 SQ2 SQ5 Key Switch Indicator Light (Green) Lamp (20W/12V, 110V) General Switch Safety Switch Safety Switch Weld Auto Stop 41 SQ6 KM FR T2 Safety Switch Contactor Overload Relay Transformer
Electrical Box (see page 41 for identification of parts) 42
427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.
