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Introduction
This manual is provided by Powermatic covering the safe operation and maintenance procedures for a
Powermatic Model 31A Combination Belt/Disc 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. If there are any questions or comments, please
contact either your local supplier or Powermatic. Powermatic can also be reached at our web site:
www.powermatic.com.
Specifications
Model Number ............................................................................. 31A ................................................. 31A
Stock Number (1 Phase model) ......................................... 1791291K .......................................................
Stock Number (3 Phase model) ......................................................... ....................................... 1791292K
Abrasive Belt Size (in.) ............................................................ 6 x 48 .............................................. 6 x 48
Disc Size (in.) ................................................................................ 12 ................................................... 12
Table Working Height (in.) ......................................... 34 disc, 36 belt ................................ 34 disc, 36 belt
Sanding Arm Locking Positions (deg.) ........................... 0, 45 and 90 .................................... 0, 45 and 90
Disc Table Size (in.) .......................................................... 17-1/4 x 9 ........................................ 17-1/4 x 9
Disc Table Tilt (deg.).................................................. 15 up, 45 down ............................... 15 up, 45 down
Belt Table Size (in.) ..................................................... 13-1/4 x 7-1/2 .................................. 13-1/4 x 7-1/2
Belt Table Tilt (deg.) ............................................................. 45 down .......................................... 45 down
Disc Speed (RPM) ..................................................................... 2375 ............................................... 2375
Belt Speed (SFPM) .................................................................... 2410 ............................................... 2410
Dust Port Diameter (in.) ................................................................... 4 ..................................................... 4
Dust Collection Minimum CFM Required ...................................... 400 ................................................. 400
Motor ...........................................................1-1/2HP, 1PH, 115/230V ..................... 2HP, 3PH, 230/460V
1
(pre-wired 115V), 60Hz, 14/7A (pre-wired 230V), 60 Hz, 7/3.5A
Recommended circuit
2
............................................................. 30/20 .............................................. 20/10
Overall Dimensions (LxWxH)(in.) ........................ 24 x 31-1/4 x 54-1/2 ........................ 24 x 31-1/4 x 54-1/2
Net Weight (lbs.) .......................................................................... 247 ................................................. 247
Shipping Weight (lbs.).................................................................. 275 ................................................. 275
1
NOTE: For 460V operation, magnetic switch (part no. 31A-MSA-2) must be purchased separately and
installed. A qualified electrician is recommended.
2
Subject to local and national electrical codes.
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 at any time and without
prior notice, without incurring obligations.
Read and understand the entire contents of this manual before attempting set-up
or operation! Failure to comply may cause serious injury.