Dynabrade 54791 Air Angle Grinder 4 Inch 13500 Rpm

Product Description

The DYNABRADE 54791 is a pneumatic angle grinder designed for heavy-duty material removal, grinding, and surface preparation in industrial and fabrication environments. It accepts Type 27 wheels up to 4 inches in diameter and spins at 13,500 RPM, driven by a 0.70 HP air motor. Operating at 90 psi and consuming 40 CFM, it requires a properly sized air supply to deliver consistent power. The 3/8-24 spindle, rear exhaust design, and composite side handle make this a practical tool for metalworking, weld blending, and finishing tasks performed by machinists, fabricators, and maintenance technicians.

The 54791 is suited for production floor, job site, and maintenance repair operations where pneumatic tooling is preferred over electric alternatives. Its rear exhaust directs air away from the work surface and the operator, which is important in close-quarters grinding work. The included side handle and steel right-angle housing provide added control and durability during sustained operation. At 8.0625 inches overall length and 3.7 pounds, it balances reach with manageable weight during extended use.

Key Features

• 13,500 RPM free speed for aggressive material removal with Type 27 grinding wheels
• 0.70 HP pneumatic motor operating at 90 psi and 40 CFM air consumption
• 3/8-24 spindle thread compatible with standard Type 27 wheels up to 4 inches
• Rear exhaust routes air away from the operator and work surface
• Composite side handle and steel right-angle housing included for control and longevity
• Trigger-lock feature supports sustained operation without continuous trigger pressure

Compatibility

Designed for use with Type 27 grinding wheels up to 4 inches in diameter with a 3/8-24 spindle thread. Requires a compressed air supply delivering 90 psi at 40 CFM through a 1/4 inch NPT inlet fitting.

Installation Notes

Installation and operation should be performed by qualified personnel familiar with pneumatic tooling and applicable OSHA standards for abrasive wheel machinery. Before mounting or changing a wheel, disconnect the air supply and verify the wheel guard is properly secured. Ensure the shop air line is sized to deliver the required 40 CFM at 90 psi to avoid power loss or inconsistent performance. Use the correct 3/8-24 spindle nut and never exceed the wheel manufacturer's rated RPM.