Powermatic 3520A instruction manual To Shape Interior of Bowl

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5.Turn workpiece by hand to ensure proper clearance.

6.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.

7.Rough out the outside of the bowl with the 1/2" deep fluted bowl gouge, holding the tool firmly against your hip. For best control, use your whole body to move the gouge through the workpiece.

8.As bowl takes shape, work on the bottom (tailstock end) to accomodate attaching a face plate.

9.Turn a short tenon (about 1/8" long) the size of the hole in the faceplate, Figure 10. This will allow centering the workpiece when the faceplate is attached. (NOTE: If you plan to use a chuck, turn a tenon of the appropriate length and diameter to fit your chuck.)

10.Stop the lathe, remove workpiece

and attach face plate or chuck (see "Mounting Stock" above).

11.Finish turning the outside of bowl with 1/2" or 3/8" bowl gouge. Leave additional material at base of bowl for support while turning interior. This will be removed later.

TO SHAPE INTERIOR OF BOWL:

1.Stop lathe and move tailstock away. Remove center from tailstock to prevent bumping it with elbow.

2.Adjust tool support in front of the bowl just below centerline, at a right angle to the lathe ways.

3.Rotate workpiece by hand to check clearance.

4.Face off top of bowl by making a light shearing cut across the top of workpiece, from rim to center.

5.Place 1/2" bowl gouge on toolrest at center of the workpiece with the flute facing top of bowl. The tool handle should be level and pointed toward four o'clock, as shown in Figure 11.

6.Use left hand to control cutting edge

of gouge, while right hand swings tool handle around toward your body (see Figure 11). The flute should start out facing top of workpiece, and rotate upward as it moves deeper into the bowl to maintain a clean even curve.

As tool goes deeper into bowl, progressively work out toward rim. It may be necessary to turn the toolrest into the piece as you get deeper into the bowl. (NOTE: Try to make one, very light continuous movement from the rim to the bottom of the bowl to ensure a clean, sweeping curve through the piece. Should there be a few small ridges left, a light cut with a large domed scraper can even out the surface.)

7.Develop wall thickness at the rim and maintain it as you work deeper into the bowl (Once the piece is thin toward the bottom, you cannot make it thinner at the rim). When the interior is finished, move tool support to exterior to re-define bottom of bowl. (General rule of thumb: the base should be approximately 1/3 the overall diameter of the bowl).

8.Work the tight area around faceplate or chuck with 1/4" bowl gouge.

9.Begin the separation with a parting tool, but do not cut all the way through yet.

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Contents Woodturning Lathe Warranty & Service Table of Contents Securely fasten spur centers to the material being used Safety RulesPage Safety Decals Specifications 3520A Lathe Receiving Installation MaintenanceAdjustments Diameter of Work Roughing RPM General Cutting Finishing RPM Speed Range AdjustmentTool Support SpindleOperating Instructions ToolsSpindle Turning Stock SelectionMounting Stock Cuts Cutting Techniques Roughing OUT Beads CovesParting OFF Face Plate & Bowl TurningTo Shape Outside of Bowl Faceplate or CHUCK?Wood Selection Tools for Bowl TurningTo Shape Interior of Bowl Sanding and Finishing Problem Possible Cause Solution TROUBLE-SHOOTING 3520A LatheDescription Quantity Parts List Headstock Assembly 3520A Lathe6821492 Headstock Assembly 3520A Lathe Parts List Stand & Bed Assembly 3520A Lathe Stand & Bed Assembly 3520A Lathe Optional Accessories Indexer & Bed Extensions 3520A Lathe Optional Accessories Indexer & Bed Extensions 3520A Lathe No. Part No. Description Optional Accessories Tool Supports 3520A LatheOptional Accessory Outboard Turning Stand 3520A Lathe Part No. Description Optional Accessories 3520A LatheOptional Accessory Optional AccessoriesElectrical Schematic 3520A Lathe Electrical Remote ON/OFF Switch Optional Electrical Schematic 3520A Lathe with Remote Switch Optional Electrical Schematic 3520A School Lathe #1352002 Electrical Schematic 3520A School Lathe 2330009 Kit AC Inverter Readings Lathe Speed Chart Remove indexing pin from indexer before operating lathe Page ALL Rights Reserved