Dynabrade 51304 Straight Air Die Grinder 0.5 Hp 1/4 Inch

Product Description

The DYNABRADE 51304 is a straight air die grinder built for precision grinding, deburring, and surface finishing in industrial and trade settings. Powered by compressed air at 90 psi operating pressure, it delivers up to 15,000 RPM with a rated output of 0.5 HP. The lever-style throttle gives operators direct speed control through the work cycle. Rear exhaust directs airflow away from the workpiece and the operator. At 1.8 pounds, the tool is light enough for extended use in tight clearances. Licensed HVAC technicians, pipefitters, machinists, and maintenance professionals commonly reach for this grinder when working in confined or detailed areas.

The 51304 suits applications where a compact, inline grinder is required for deburring pipe ends, cleaning weld seams, or finishing internal bores. The included 1/4 inch collet insert handles standard die grinder bits and carbide burrs. Optional collet inserts expand bit compatibility to 1/8 inch, 3/8 inch, 6 mm, and 8 mm shank sizes, making this tool adaptable across a range of tooling inventories common in fabrication shops, maintenance facilities, and mechanical contractors.

Key Features

• 15,000 RPM free speed with 90 psi operating pressure
• 0.5 HP air motor in a straight inline body
• Lever throttle for precise speed and load control
• Rear exhaust keeps debris and airflow away from the work surface
• Includes 1/4 inch collet insert (50013); compatible with optional 1/8 inch (50065), 3/8 inch (50014), 6 mm (50016), and 8 mm (50039) collet inserts
• CE Certified and EAC Certified

Compatibility

Accepts 1/4 inch shank tooling via the included collet insert (50013). Optional collet inserts for 1/8 inch (50065), 3/8 inch (50014), 6 mm (50016), and 8 mm (50039) shanks are available separately for expanded tooling compatibility.

Installation Notes

Installation and operation should be performed by personnel familiar with pneumatic tool safety practices. Before attaching or changing collets or bits, disconnect the air supply line completely. Verify the air supply is regulated to 90 psi and that the line delivers adequate volume; undersized supply lines will reduce tool performance. Inspect the collet and collet nut for wear before each use, and ensure all accessories are rated for the tool's maximum free speed.