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20" WOODTURNING LATHE Model 3520A Instruction Manual & Parts List M-0460221 (800) 248-0144 www.powermatic.com...
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This manual has been prepared for the owner and operators of a Powermatic Model 3520A Lathe. Its purpose, aside from proper machine operation, is to promote safety through the use of accepted correct operating and maintenance procedures. Completely read the safety and maintenance instructions before operating or servicing the machine.
SAFETY RULES As with all machines, there is a certain amount of hazard involved with the use of this lathe. Use the machine with the respect and caution demanded where safety precautions are concerned. When normal safety precautions are overlooked or ignored, personal injury to the operator can result. Read, understand and follow the safety and operating instructions found in this manual.
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Drugs, alcohol, medication. Do not operate tool while under the influence of drugs, alcohol, or any medication. Do not use this Powermatic wood lathe for other than its intended use. If used for other purposes, Powermatic disclaims any real or implied warranty and holds itself harmless from any injury that may result from that use.
Footprint of stand...........................50" L x 24" W NOTE: The above specifications were current at the time this manual was published, but because of our policy of continuous improvement, Powermatic reserves the right to change specifications without notice and without incurring obligations.
MAINTENANCE Install the four leveling screws in the legs, adjust to a Maintenance on the 3520A lathe should be performed stable, level position and tighten the jam nuts to lock at periodic intervals to insure that the machine is in in place.
TOOLS If possible, select only quality, high speed steel turning tools. High speed tools hold an edge and last longer than ordinary carbon steel. As one becomes proficient in turning, a variety of specialty tools for specific applications can be acquired. The following tools provide the basics for most woodturning projects: Large Roughing Gouge - 1"...
SPINDLE TURNING Spindle turning takes place between the centers of the lathe. It requires a spur or drive center in the headstock and a revolving or live center in the tailstock. A cup center rather than a cone center will reduce the risk of splitting the stock.
Rotate workpiece by hand to check for proper clearance. Start lathe at lowest speed and bring it up to the appropriate RPM for the size of stock used (refer to table on page 9). CUTTING TECHNIQUES ROUGHING OUT: Begin with a large roughing gouge. Place the tool on the tool support with the heel of the tool on the surface to be cut.
Lightly mark the center of the "V" with the tip of the skew. Move the point of the skew to the right half of the desired width of your cut. With the bevel parallel to the right side of the cut, raise the handle and push the tool in to the desired depth, as shown in Figure 8.
Lock the tailstock to the bed and advance the spindle in order to seat the cup center into the workpiece. Tighten the quill lock. Position tool support below the centerline and about 1/4" from the workpiece. (NOTE: For larger outboard turning, an optional outboard turning stand is used to place the tool support; see your Powermatic dealer).
Turn workpiece by hand to ensure proper clearance. Start lathe at lowest speed and bring it up to the maximum safe speed for the size of work to be turned (see chart on page 9). If the machine starts to vibrate, lower the speed until vibration stops. Rough out the outside of the bowl with the 1/2"...
SANDING AND FINISHING: Remove the toolrest and adjust lathe speed to approximately 500 RPM. High speed can build friction while sanding and cause heat check in some woods. Begin with fine sandpaper (120 grit) and progress through each grit, using only light pressure. Coarser sandpaper tends to leave deep scratches that are hard to eliminate.
TROUBLE-SHOOTING (3520A Lathe) PROBLEM POSSIBLE CAUSE SOLUTION Excessive vibration. 1. Defective spindle bearings. 1. Replace bearings. 2. Worm or defective belt. 2. Replace belt. 3. Defective motor. 3. Replace motor. 4. Workpiece warped, out-of-round, 4. Correct problem by planing has major flaw, or was improperly or sawing, or scrap workpiece.
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PARTS LIST: Headstock Assembly (3520A Lathe) Part No. Description Quantity 2277128 Headstock Assembly ..................1 6294792 Headstock ......................1 3719189 Motor Sheave ....................1 2595036 Motor Assembly Plate..................1 6294793 Motor, 2HP, 220V, 60Hz ...................1 6350031 Motor Plate Locking Handle................1 6060014 Bearing......................1 6430045 Knob.........................2 6716139 Flat Head Socket Screw, 3/8-16 x 1..............4...
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PARTS LIST: Stand & Bed Assembly (3520A Lathe) Part No. Description Quantity 6295920 Bed ........................1 3423053 Lathe Leg ......................2 6716012 Socket Head Cap Screw..................2 3761159 Stop Block......................2 6294752 Tool Support Assembly (Consists of items 7, 8, 10, 14, 31, 48, 49, 51)....1 6294742 Tool Support 14"...
OPTIONAL ACCESSORIES: Tool Supports (3520A Lathe) Part No. Description 3585011 Tool Support Pin 5/8 X .495 X 3.50 6294745 Ball Bearing Tailstock Center (not shown) 6294730 12" Metal Spinning Tool Support Assembly (Items 1 and 4) 6294731 26" Tool Support Assembly (Items 6 thru 8)
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ELECTRICAL: Remote ON/OFF Switch (Optional) NOTE: The lathe can only operate when both the headstock and remote switches are in the "ON" position. STEP 1: Disconnect all electrical power to lathe. STEP 2: Remove the two screws from the control panel. Do NOT disconnect control panel from wiring harness.
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ELECTRICAL SCHEMATIC: 3520A Lathe with Remote Switch (Optional)
Instructions for Mounting Indexing Assembly (Optional Accessory) Remove the handwheel. Loosen the two set screws and slide the handwheel off. If your lathe was purchased before January 1998, you must drill a 1/4" hole into the headstock so that the indexer will work properly. Before the 1/4" hole can be drilled you must first make sure that the 1/4" hole will line up with the holes in the indexer.
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Locating the stock number of the part(s) required from your parts manual will also expedite your order. Phone No.: (800) 248-0144 Fax No. (800) 274-6840 If you are calling from Canada, please call 800-238-4746 E-mail: powermatic@wmhtoolgroup.com Website: www.powermatic.com...
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03/03 WMH Tool Group 427 Sanford Rd. LaVergne, TN 37086 Phone:(800) 248-0144 Fax: (800) 274-6840 E-mail: powermatic@wmhtoolgroup.com Website: www.powermatic.com Powermatic ALL RIGHTS RESERVED...