Dynabrade 54773 Air Angle Grinder 4 Inch 12000 Rpm

Product Description

The DYNABRADE 54773 is a pneumatic angle grinder built for grinding, blending, and surface preparation in industrial and fabrication environments. It spins a 4-inch Type 27 wheel at 12,000 RPM and draws on 0.70 horsepower to deliver consistent cutting and stock removal. Air supply connects through a 1/4-inch NPT inlet at a rated 90 psi, with a 40 CFM air consumption requirement. The composite side handle and trigger-lock mechanism give operators a controlled, fatigue-reducing grip during extended use. Rear exhaust directs airflow away from the work surface and the operator. Licensed HVAC, mechanical, and fabrication professionals will find this tool appropriate for weld seam grinding, rust removal, and material blending tasks.

The 54773 is suited for metalworking and fabrication shops, maintenance facilities, and construction sites where a reliable pneumatic angle grinder is required. The aluminum right-angle head and adjustable wheel guard are included as standard equipment, making this unit ready to run with a compatible 4-inch Type 27 grinding wheel. The tool measures 11.375 inches in overall length, fitting comfortably in confined work areas. It is appropriate for both production-line and field service applications where air supply at 90 psi is available.

Key Features

• 4-inch Type 27 wheel compatibility for grinding and blending applications
• 12,000 RPM free speed driven by 0.70 HP pneumatic motor
• Trigger-lock throttle for extended-use operator control
• Rear exhaust keeps debris and airflow away from the work surface
• Composite side handle reduces vibration transfer and operator fatigue
• Includes adjustable wheel guard and aluminum right-angle head

Compatibility

Designed as an OEM-style pneumatic angle grinder accepting 4-inch Type 27 grinding wheels with a 3/8-24 spindle thread. Requires a compressed air supply delivering 90 psi and at minimum 40 CFM flow.

Installation Notes

Installation and operation of pneumatic angle grinders should be performed by qualified personnel familiar with compressed air tool safety. Disconnect and bleed the air line before mounting or changing a wheel. Verify the wheel is rated for at least 12,000 RPM before installation, and confirm the wheel guard is properly secured before applying air pressure. Always follow applicable OSHA and ANSI B11 safety standards when operating grinding equipment.