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 11

BELT ARM POSITIONING 

 
Your sander is equipped with a shot pin arrangement to 
lock the belt arm in 0-degree, 45-degree, and 90 degree 
positions.  To position the belt, loosen the locking handle 
(A) shown in Figure 10. Pull out on the shot pin (B), 
shown in Figure 11, and swing the belt arm into the 
desired position. Then release the shot pin.  Check that 
the pin has gone into position by attempting to move belt 
arm back and forth.  Re-tighten locking handle (A-Figure 
10).  When positioning the arm at any non-standard 
angle, make sure the locking handle is tightened 
securely. 
 
NOTE:  If the locking handle conflicts with the motion of 
the belt arm, pull up on the handle and turn it out of the 
way, as shown in Figure 10. 
 
 

CHANGING MOTOR VOLTAGE 

 

 WARNING:  ELECTRICAL WIRING SHOULD  

 

 

 

BE DONE BY A QUALIFIED ELECTRICIAN. 

 

THE MACHINE MUST BE PROPERLY GROUNDED TO 
HELP AVOID ELECTRICAL SHOCK AND 
ASSOCIATED HAZARDS INCLUDING POSSIBLE 
DEATH.  
 
To change the motor voltage, remove the terminal box 
cover and rewire per the circuit shown on the cover.  On 
magnetic starter models, starter wiring and transformer 
wiring (when used) will also have to be changed as 
shown on the decals attached. 

 

 
 
OPERATING THE SANDER
 

 
The belt and disc sander can be equipped with a variety 
of abrasives and grit sizes to handle a wide variety of 
materials, from soft woods to hardened steel.  It can be 
used to rapidly remove material and produce a mirror 
finish.  Using various types of fixtures, they can be used 
to sand template forms, angles, freehand contours, and 
flats on edges, surfaces and ends. 
 

 
 
TEMPLATE FORMS
 

 
A template similar to that shown in Figure 12, can be 
made to faciliate sanding multiple pieces to the same 
size. 
 

 
 
 

!

Summary of Contents for BD31A

Page 1: ...BELT DISC SANDER Model BD31A Instruction Manual Parts List M 0460267 800 274 6848 www powermatic com...

Page 2: ...egligence or accidents normal wear and tear repair or alterations outside our facilities or to a lack of maintenance THE WMH TOOL GROUP LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD SPECIFIED ABOVE FROM...

Page 3: ...nment 9 Platen Adjustment 10 Sanding Table Adjustment 10 Work Stop 10 Belt Arm Positioning 11 Changing Motor Voltage 11 Operating the Sander 11 Template Forms 11 Fence Table 12 Types of Operations 13...

Page 4: ...erial saw dust oil and other liquids to minimize the danger of tripping or slipping Make certain the work area is well lighted and that a proper exhaust system is used to minimize dust Powermatic reco...

Page 5: ...or damage which may result from that use If you are not thoroughly familiar with the operation of sanders obtain advice from your supervisor instructor or other qualified person Drugs alcohol medicat...

Page 6: ...6 SAFETY Decal for Model 31A Sander Familiarize yourself with the location and content of this decal on your machine 31A 102...

Page 7: ...n 0 45 and 90 degrees Table size disc 14 1 2 x 6 1 2 Disc table tilt 15 degrees up to 45 degrees down Fence table tilt 0 degrees up to 45 degrees down Fence size 13 W x 7 1 2 L Net weight 246 4 lbs NO...

Page 8: ...of the base If using a mobile base be sure to lock the wheels before assembling operating or making adjustments to the sander A mobile base for your sander is available from Powermatic stock 708221 2...

Page 9: ...ollows Figures 5 and 6 1 Loosen the knob A and swing the belt end guard B out of position 2 Remove the side guard C by loosening and removing the two screws D holding it Release tension on the belt by...

Page 10: ...he table against the stop to make sure it is 45 degrees If it is not adjust by loosening the hex nut and screwing the stop in or out as needed Re tighten hex nut A zero degree stop D is located behind...

Page 11: ...NG ELECTRICAL WIRING SHOULD BE DONE BY A QUALIFIED ELECTRICIAN THE MACHINE MUST BE PROPERLY GROUNDED TO HELP AVOID ELECTRICAL SHOCK AND ASSOCIATED HAZARDS INCLUDING POSSIBLE DEATH To change the motor...

Page 12: ...attachment and rotate the pivot plate D 180 degrees lining the holes up with the holes in the sander See Figure 15 Place the fence attachment on the pivot plate with the table perpendicular to the bel...

Page 13: ...in mind that abrasive sanding develops heat so burns can occur on wood if you try to remove material too fast With metal it may be necessary to have a container of water nearby to keep the workpiece c...

Page 14: ...t 57422110 6 x 48 Sanding Belt 40 Grit Open Coat 57422210 6 x 48 Sanding Belt 60 Grit Open Coat 57422310 6 x 48 Sanding Belt 80 Grit Open Coat 57422410 6 x 48 Sanding Belt 100 Grit Open Coat 57422510...

Page 15: ...venly 3 Replace belt Abrasive disc comes free 1 Improperly bonded 1 Clean adhesive off aluminum and of aluminum discs reapply adhesive Belt slips or stalls on 1 Abrasive belt tension inadequate 1 Tigh...

Page 16: ...Side Plate Casting 1 25 31A 25 Rocker Arm 1 26 31A 26 Hex Head Bolt 1 27 31A 27 Platen 1 28 31A 28 Side Cover 1 29 31A 29 Bearing 6205ZZ 2 30 31A 30 Pan Head Screw w Flange M5 x 8 1 31 31A 31 Bearing...

Page 17: ...31A 61 Roll Pin 6mm dia x 24 2 72 31A 62 Roll Pin 6mm dia x 45 4 73 31A 63 V belt A50 1 74 31A 64 Roll Pin 5mm dia x 30 1 75 31A 65 Stop Block 1 78 31A 68 Lock Knob 8mm x 20 1 79 31A 69 Flat Washer 8...

Page 18: ...18 Body Assembly Model 31A Sander...

Page 19: ...sher M4 4 16 TS 1551021 Lock Washer M4 4 17 31A 90 Pan Head Screw M4 x 8 2 18 31A 91 Pan Head Screw M5 x 8 2 19 31A 92 Hex Head Screw M10 x 135 1 20 31A 93 Self Tapping Screw M3 5 x 38 2 21 31A 94 Swi...

Page 20: ...20 Stand Assembly Model 31A Sander...

Page 21: ...21 ELECTRICAL SCHEMATIC Model 31A Sander...

Page 22: ...22 ELECTRICAL SCHEMATIC Model 31A Sander...

Page 23: ...Serial Number of your machine available when you call will allow us to serve you quickly and accurately Locating the stock number of the part s required from your parts manual will also expedite your...

Page 24: ...24 07 02 WMH Tool Group P O Box 1349 Auburn WA 98071 1349 Phone 800 274 6848 Fax 800 274 6840 E mail powermatic wmhtoolgroup com Website www powermatic com Powermatic ALL RIGHTS RESERVED...

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