Powermatic 31A Combination Belt/Disc Sander 1.5hp, 1PH - PM9-1791291K

Powermatic 31A Combination Belt/Disc Sander 1.5hp, 1PH

The Powermatic 31A is designed to bring the power, accuracy, and versatility you need to breeze through the toughest of sanding tasks in many woodworking and metalworking applications. The combination of belt and disc sanding in one machine saves space and money while maximizing the capabilities of both abrasive types.

The 31A features either a 1.5hp or 3hp TEFC (totally enclosed fan cooled) motor mounted within the enclosed base cabinet. The motor delivers its power to the belt and disc units through a pair of precisely made and balanced pulleys using a quality V-belt. Belt tensioning adjustments are easily accessible through a large door on the rear of the enclosed base cabinet.

A built-in dust collection system helps keep your shop and the air within it cleaner. The dust collection system is fully ducted within the Powermatic 31A and terminates in a 4” diameter port near the bottom of the enclosed base cabinet. This built-in system is very efficient when combined with your dust collector - 300-400 CFM suggested.

The belt arm is built around a large iron casting for the maximum in strength and stability. The belt arm can be positioned anywhere from 0° (horizontal) to 90°. A “shot pin” is built in to index the arm at 0, 45 and 90°. The arm can be positioned at any angle between those presets and secured with the locking handle.

A curved (hinged) metal cover at the lower belt roller can be rotated out of the way for many types of contour sanding. This curved piece and the side cover are secured with finger knobs that make moving them out of the way for belt changes or cleaning a tool-free operation. All of the belt controls are also knob-operated so those adjustments are also tool-free and can be made quickly with minimal down time.

Set into a cast iron shroud and base, the 12” diameter, adhesive-backed disc mounts to an aluminum drive plate. That plate is accurately machined and balanced to insure smooth vibration and chatter-free sanding. The disc spins at approximately 2,380 RPM to provide a good balance between material removal power and fine sanding control.

If you need a solid, full-featured, fully capable sanding machine, the Powermatic 31A Belt/Disc Sander will handle your needs today and in the future.

• 12" Disc is balanced for flat, even coverage
• 6" x 48" sanding belt can be changed and adjusted quickly and easily
• Belt and disc tables are precision ground cast iron with miter slots for precision and rigidity
• Belt table tilts down to 45°, and can be set for beveled and mitered angle sanding
• Full cast iron platen with solid crowned aluminum drums for smooth sanding belt movement and support
• Multi-position belt head locks at any angle from 0° to 90°; includes indexing pin for 0, 45°, and 90° stops
• Versatile belt and disc sanding allows for multiple sanding angles
• Removable work stop mounted on the belt arm prevents the piece from being thrown off when the belt is in the horizontal position
• Inlet ports are designed to be “always on” to help minimize airborne dust without compromising the collection efficiency at the portion being used
• Large fence can be mounted in various positions on belt to accommodate a wide range of sanding needs

• 1.5HP Motor: Provides ample power for smooth, efficient sanding on both belt and disc surfaces.
• Combination Design: Dual functionality allows you to switch between belt and disc sanding without the need for multiple tools.
• Durable Build: Heavy-duty construction ensures longevity and stability, even with continuous use.
• Precision Adjustment: Features precise tracking and angle adjustments for accurate sanding results.
• Compact Footprint: Space-efficient design suitable for smaller shops without sacrificing performance.

Q: What is the Powermatic 31A Combination Belt/Disc Sander (PM9-1791291K)?
A: A versatile 31A combination belt and disc sander with a 1.5HP motor, 1-phase operation, designed for precise sanding and finishing in woodworking shops.

Q: What are its key features?
A: 6" x 48" belt and 12" disc, 1.5HP motor, adjustable belt angle, sturdy cast iron construction, and a reliable dust collection system for clean operation.

Q: Who is it ideal for?
A: Perfect for woodworkers and small shops needing both belt and disc sanding capabilities for versatile finishing and shaping tasks.

Q: Why choose this model?
A: Offers dual sanding functions in one machine, combining power and precision for efficient, high-quality results in woodworking projects

• Inspect Sanding Belts and Discs: Regularly check for wear, cracks, or damage; replace as needed for smooth operation.
• Clean Regularly: Remove dust and debris from the sanding surfaces, motor, and dust collection port after each use.
• Lubricate Moving Parts: Apply lubricant to the tensioning mechanisms, bearings, and adjustment knobs to ensure smooth movement.
• Check Belt and Disc Alignment: Ensure the belt and disc are properly aligned to avoid uneven wear and maintain accurate sanding.
• Tension the Belt: Ensure the sanding belt is properly tensioned to prevent slipping or misalignment during use.
• Inspect Electrical Components: Check the motor, switches, and power cords for any signs of wear or damage.
• Dust Collection Maintenance: Ensure the dust collection system is clean and properly connected for effective dust removal.
• Proper Storage: Store in a dry, clean area to prevent rust and corrosion on metal parts.