Dynabrade 40321 Belt Straight Sander 0.5 Hp 20000 Rpm

Product Description

The DYNABRADE 40321 is a corded pneumatic belt straight sander designed for material removal, surface finishing, and blending operations in industrial and trade environments. Powered by a 0.5 HP air motor, it delivers a belt speed of 4,550 feet per minute and a free speed of 20,000 RPM, making it well-suited for aggressive stock removal on metal, wood, and composite surfaces. It connects via a 1/4 inch NPT air inlet and requires 28 CFM of air consumption at rated load. The tool weighs 5.1 pounds, keeping operator fatigue manageable during extended use. Typically installed or operated by machinists, fabricators, pipefitters, and general tradespeople requiring inline sanding access.

The 40321 is built for straight inline sanding tasks where angle grinders or disc sanders cannot reach. Common applications include weld seam blending, pipe preparation, and surface conditioning in fabrication shops, maintenance facilities, and production environments. Its straight body profile allows access to tight clearances and confined workspaces. The pneumatic drive requires a compressed air supply capable of sustaining adequate CFM at the tool inlet for consistent performance.

Key Features

• 0.5 HP air motor delivers consistent power for surface stock removal and blending
• 20,000 RPM free speed with a belt surface speed of 4,550 feet per minute
• 1/4 inch NPT inlet for standard shop air connection
• 28 CFM air consumption at rated load — size your compressor accordingly
• 5.1 pound tool weight reduces fatigue during extended inline sanding operations
• Straight body profile allows access to confined areas and narrow workspaces

Compatibility

Designed as a direct-use pneumatic belt straight sander compatible with standard compressed air systems equipped with a 1/4 inch NPT fitting. No specific OEM replacement compatibility was stated in the product data.

Installation Notes

The 40321 is a pneumatic tool operated by qualified tradespeople using a regulated compressed air supply. Before connecting or disconnecting the tool, shut off air supply at the source and bleed residual pressure from the line. Ensure the air supply meets the 28 CFM consumption requirement to avoid underpowering the motor. Inspect the belt and guards before each use and follow applicable OSHA and ANSI abrasive tool safety guidelines.