Dynabrade 54793 Air Angle Grinder 4 Inch 13500 Rpm

Product Description

The DYNABRADE 54793 is a pneumatic angle grinder built for metal fabrication, weld grinding, and surface prep in industrial and trade environments. It accepts a 4-inch grinding wheel and spins at 13,500 RPM, driven by a 0.70 HP air motor running at 90 psi. The 3/8-24 spindle accommodates standard 4-inch grinding and cutting wheels. A 1/4-inch NPT air inlet connects directly to a standard shop air supply line, and the rear exhaust directs spent air away from the work surface and the operator. The trigger-lock feature allows sustained operation without continuous hand pressure, reducing fatigue during extended use. This grinder is intended for use by metalworkers, fabricators, and maintenance technicians working with compressed air systems.

The 54793 is suited for angle grinding tasks in fabrication shops, maintenance facilities, and industrial job sites where a compact 4-inch pneumatic grinder is required. Typical applications include weld seam grinding, deburring, and surface conditioning on steel and other metals. The tool requires a consistent air supply capable of delivering 40 CFM at 90 psi for rated performance. It is used wherever a right-angle approach to the workpiece is needed and a corded electric tool is impractical or restricted.

Key Features

• 4-inch wheel diameter fits standard grinding and cutting wheels with a 3/8-24 spindle
• 13,500 RPM no-load speed for aggressive material removal
• 0.70 HP pneumatic motor operates at 90 psi rated air pressure
• Trigger-lock for sustained operation without continuous hand pressure
• Rear exhaust routes airflow away from the operator and work surface
• 1/4-inch NPT air inlet compatible with standard shop air fittings

Compatibility

Designed for use with standard 4-inch grinding wheels and cutting accessories using a 3/8-24 spindle thread. Requires a compressed air supply delivering 40 CFM at 90 psi for rated output.

Installation Notes

Installation and wheel changes must be performed with the air supply line fully disconnected. A licensed industrial mechanic or qualified pneumatic tool technician should verify that the air supply pressure does not exceed the tool's rated 90 psi before operation. Always confirm that the wheel's maximum RPM rating meets or exceeds the tool's 13,500 RPM no-load speed before mounting. Follow applicable OSHA and ANSI B11 safety standards for abrasive wheel tools when placing this grinder into service.