This Manual is Bookmarked Operating Instructions and Parts Manual Drum Sander Model 22-44 Pro Deluxe model shown (with casters and infeed/outfeed tables) WMH TOOL GROUP 2420 Vantage Drive Elgin, Illinois 60123 Ph.: 800-274-6848 www.wmhtoolgroup.com Part No.
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 Table of Contents ....................................................................................................................................3 Warning...................................................................................................................................................4 Introduction..............................................................................................................................................6 Specifications ...............
Warning 1. Read and understand this entire 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 sander is designed and intended for use by properly trained and experienced personnel only.
blahblahblah 21. Make your workshop child proof with padlocks, master switches or by removing starter keys. 22. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are careless acts that can result in serious injury. 23. Maintain a balanced stance at all times so that you do not fall or lean against moving parts. Do not overreach or use excessive force to perform any machine operation. 24.
Introduction This manual is provided by WMH Tool Group covering the safe operation and maintenance procedures for a JET Model 22-44 Pro Drum Sander. 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 years of trouble free operation if used in accordance with instructions set forth in this manual.
Features and Terminology The illustration below shows the major components and features of the 22-44 Pro Sander. These are referenced throughout the manual and will help to familiarize you with the operation and functions of the machine.
1 1 4 4 8 4 12 20 8 2 2 2 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 Drum Sander is assembled 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.
Assembly Tools required for assembly: Hoist, forklift, or one or more assistants Wrenches – 9/32”, 1/2” , 9/16” Hex wrenches – 4mm, 1/8” Install Stand Legs The sander is heavy; use caution when lifting. 1. Raise the sander from the floor using a forklift, hoist or an assistant. (Place hoist straps through the carriage arm or below the table mounting brackets. If using a forklift, fork below the table mounting brackets. See Figure 1, page 7.) Figure 3 2.
2. Re-tighten the set screw with your fingers until it only lightly touches the column tube. 3. Hold the set screw in position with the hex wrench, and re-tighten the hex nut. Install Handwheel Mount the handwheel to the top of the height adjustment screw (Figure 6). Align one of the set screws with the flat on the height adjustment screw, and tighten both set screws. Install the knob to the threaded hole in the handwheel, and tighten the hex nut against the handwheel. Install Conveyor Table 1.
6. Position the table (H, Figure 9) over the brackets, and install four 1/4”x3/4” square neck bolts (J), 1/4” flat washers (K), and 1/4” hex nuts (L). Do not fully tighten yet. 7. The table should be positioned even with or slightly below the conveyor belt surface. To check position, place a level or straight edge near the left side of the conveyor and extending out over the table, as shown in Figure 10.
Installing Abrasives An 80-grit abrasive strip is already installed on the drum of your sander. Page 28 offers information on the types of abrasive and their recommended uses. Proper attachment of the abrasive strip to the drum is critical to achieving top performance from your drum sander. Abrasive strips do not have to be pre-measured. The end of the roll is first tapered and attached to the left (outboard) side of the drum.
8. You can use your fingers to work the infeed take-up fastener, but it will be more convenient to use the TUFTool supplied with your sander. Hold the TUFTool with the red end pointing away from you (Figure 15) and insert its hook into the outside hole of the fastener lever (see Figure 17). 9. Lift the lever with the TUFTool, pulling the lever up until it touches the inside of the drum. 10.
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. 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. This tool is equipped with an electric cord having an equipment-grounding conductor and a grounding plug.
Extension Cords Recommended Gauges (AWG) of Extension Cords Extension Cord Length * If an extension cord is necessary, make sure the cord rating is suitable for the amperage listed on the machine's motor plate. An undersize cord will cause a drop in line voltage resulting in loss of power and overheating. The chart in Figure 20 shows the correct size cord to use based on cord length and motor plate amp rating. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the cord.
• The set screws in the table supports have been loosened and readjusted (see page 9). • The sander has been leveled (page 11). • Moving parts of the height adjustment mechanism are well lubricated, including miter gears, columns, and threaded adjusting screws. If the table height mechanism still does not operate smoothly, try the following: 1. Further loosen the set screws on the front of the table supports (see Figure 5). 2.
6. If one height adjustment screw is loose, remove the miter gear from the transfer rod on that side. Turn down the threaded height adjustment screw rod until it is snug. Make sure both sides are snug on top and retaining rings under the adjustment screw supports are in place. Re-install the miter gear. Loosen the set screws in the table supports and test for smooth operation.
3. Insert the gauge between the drum and conveyor bed at one end of the drum (Figure 26). Raise the conveyor bed while slowly rotating drum by hand until the drum lightly contacts the thickness gauge. 4. Move thickness gauge to the opposite end of the drum. If the drum does not contact the thickness gauge equally at both ends of the drum, alignment is necessary. See below. Initial Drum Alignment 1. Release v-belt tension from motor by loosening pinch bolt of motor support (Figure 27). 2.
2. Slightly loosen bearing bolt knobs. (An internal tooth lock washer is placed under the head of each bearing bolt to prevent tension rollers from dropping out of position if knobs are loosened slightly. If tension rollers do drop, simply raise to a position equal to that of the inboard end of the drum and slightly tighten knobs.) 3. With the bearing bolt knobs slightly loosened, raise drum adjustment lever to raise the outboard end of drum, or lower drum adjustment lever to lower the outboard end of drum.
Adjusting the take-up screw nuts on either side of the conveyor allows belt tracking adjustments to be made without affecting belt tension. NOTE: Adjust take-up screw nuts only 1/4 turn at a time. Then allow time for the belt to react to the adjustments before proceeding further. Try to avoid over adjustments. Trackers The sander comes equipped with “Trackers”, ceramic guides that reduce the amount of adjustments needed to keep the conveyor belt tracked (centered) on the conveyor bed. See Figure 32.
Step 2: Now repeat Step 1 on the right (inboard) side of conveyor. Compare the measurements from side to side. If they are not equal, loosen one of the brackets that hold the roller in place. Tip this bracket until the distance between the roller and the straight-edge are equal from side to side, then tighten the bracket.
If the conveyor table is still difficult to raise or lower, the table supports may need to be recentered on the columns. To do this, loosen the four 3/8”x1” hex head bolts in each table support that connects it to the table mounting brackets, adjust and tighten the set screws (see Figure 5) to hold the table support in position. Then tighten the hex head bolts and re-loosen the set screws. Re-align drum (see page 17). Replacing V-Belt 1. Unplug machine from power source. 2.
4. After the machine has run for about 30 minutes, stop to check that the set screws and bearing bolts are still tight. NOTE: It may be necessary to re-align the tension rollers after rotating the drum bearings. See page 18. Replacing Drum Bearings If the bearings are squealing or are loose, they may need replacing. 1. Unplug sander from power source and remove dust cover. 2. Raise conveyor table until the sanding drum rests on the conveyor. 3.
Start sanding drum and sand the stock at that same position. Operation Before using your drum sander, review the previous pages in this manual on initial set-up and adjustment. In this section, you will learn how to operate the machine. Make sure an abrasive strip is mounted and a dust collection system is connected. Do not start drum while in contact with stock! For sanding with grits coarser than 80, you can raise the conveyor table slightly. Always maintain control of stock.
Learning how to use its adjustments and controls will allow you to fine-tune the machine for maximum results. The best results come from experimenting with different abrasive grits and machine adjustments to fit the job at hand. Following is a list of useful tips which can help you improve performance of your sander. extra roller stands, help from another person, or hand pressure on the stock, to minimize potentially hazardous situations.
For best results, perform the following recommended procedures on a monthly basis: 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. Keeping the Machine Clean For best results, make cleaning the machine a regular shop procedure.
8. Install second Tracker opposite the first. Use both Trackers unless the second one does not fit in conveyor or if conveyor belt is damaged. Tracker Kit (98-0080) Trackers dramatically reduce tracking adjustments of conveyor belts. They are already installed on your sander. The following information is for re-setting or replacing your trackers, should that become necessary. Refer to Figure 43. 9. Turn conveyor table right-side up and reposition it onto the sander.
In general, premium quality abrasives will produce a better finish with a less noticeable scratch pattern. Abrasives The abrasive material you choose will have a substantial effect on the performance of your sander. Variations in paper type, weight, coating and durability all contribute to achieving your desired finish. NOTE: Grits that are too fine can sometimes burnish the wood and leave a glossy surface which will not accept stains evenly. This will vary by type of wood.
Troubleshooting: Motor and Electrical Problems Trouble Probable Cause Remedy No incoming power. Check plug connections. Connect main cord to power source, and motor cord into control box receptacle. Circuit fuse blown or breaker tripped. Replace fuse or re-set breaker. Switch is malfunctioning. Replace switch. Inadequate circuit. Check electrical requirements. Feed rate too fast or depth of cut too large. Reduce feed rate and/or depth of cut. Motor not properly aligned.
Trouble Probable Cause Remedy Conveyor belt out of adjustment. Readjust conveyor belt; see page 19. Drive or driven roller needs adjusting. Readjust; see page 20. Conveyor belt worn or defective. Replace conveyor belt; see page 20. Drive roller worn, bent, or varies in diameter side to side. Replace drive roller. Roller bushings elongated due to excessive wear. Replace bushings. Strip caught on inside edge of slot, or on inboard side of drum.
Troubleshooting: Operational Problems Trouble Probable Cause Remedy Ripples in sanded surface. Uneven feed rate. Check for these conditions and refer to previous Troubleshooting sections: (Non-uniformly spaced ripples). Conveyor belt slips on drive roller. Board slips on conveyor belt. Conveyor gear motor stalls. Excessive v-belt tension. Set screw loose on shaft coupler between gear motor and conveyor. Conveyor bushings worn – replace. Conveyor bushings dry – lubricate. Ripples in sanded surface.
Trouble Probable Cause Remedy Conveyor belt is loose. Adjust conveyor belt tension. See page 19. Excessive depth of cut. Reduce depth of cut. Wood slipping on conveyor due to lack of contact. Use alternate feeding procedure. Abrasive is too fine. Replace with coarser grit. Line or groove in stock. Inconsistent feed rate. Do not stop or change the feed rate while feeding stock. Unsanded ridge along length of piece (sandpaper appears clean). Grit has been removed from backing.
Optional Accessories 98-2201 98-0130 80-2910 60-2000 60-2024 60-2036 60-2060 60-2080 60-2100 60-2120 60-2150 60-2180 60-2220 60-8024 60-8036 60-8050 60-8060 60-8080 60-8120 60-9036 60-9060 60-9080 60-9100 60-9120 60-9150 60-9180 60-9220 Infeed/Outfeed Tables Casters (set of 4) Dust Hose Adaptor, 4” reduce to 2-1/2” TM Ready-To-Wrap Assortment Package (one each of 30, 80, and 120 grit) TM Ready-To-Wrap Abrasive Strip, 24 Grit, (4 wraps in a box) TM Ready-To-Wrap Abrasive Strip, 36 Grit, (4 wraps in a box) T
Stand Assembly 34
Parts List: Stand Assembly Index No. Part No. Description Size Qty 1...............31-0027................... Handwheel Assembly .................................. 8”O.D., 1/2” I.D.................. 1 2...............10-8903................... Socket Set Screw ........................................ 5/16”x3/8” ......................... 2 3...............BB-R8ZZ................. Bearing........................................................ ......................................... 4 4...............
Drum Head Assembly 36
Parts List: Drum Head Assembly Index No. Part No. Description Size Qty 1...............30-0002W ............... Drum Carriage Arm...................................... ......................................... 1 2...............30-0015W ............... Clamp Jaw................................................... ......................................... 1 3...............12-0005................... Hex Nut ....................................................... 3/8”-16 .............................. 1 4.
Conveyor and Motor Assembly 38
Parts List: Conveyor and Motor Assembly Index No. Part No. Description Size Qty 1...............72-2250-01.............. Knob............................................................ ......................................... 1 2...............40-4017W ............... Control Housing Bracket .............................. ......................................... 1 3...............JSG96-135.............. On/Off Drum Switch..................................... .........................................
Infeed and Outfeed Tables (98-2201) – Optional Accessory Index No. Part No. Description Size Qty 1...............40-0329................... Infeed/Outfeed Table ................................... ......................................... 2 2L .............40-0327................... Mounting Bracket (LH) ................................. ......................................... 2 2R ............40-0328................... Mounting Bracket (RH) ................................ ..........................
Electrical Connections 41
NOTES 42
WMH Tool Group 2420 Vantage Drive Elgin, Illinois 60123 Phone: 800-274-6848 www.wmhtoolgroup.