Makita 9557PB 4-1/2-Inch Paddle Switch Angle Grinder with AC/DC Switch – 7.5A, 11,000 RPM

Overview

The Makita 9557PB 4-1/2-Inch Angle Grinder with Paddle Switch is built for professionals who need serious grinding power in a compact package. Powered by a robust 7.5A motor, this tool reaches up to 11,000 no-load RPM, delivering ample speed for metal shaping, edge work, and surface prep. Its lightweight design—about 4.5 pounds—helps you maintain balance and control during longer sessions. A defining feature is the labyrinth construction that seals the motor and bearings from dust and debris, helping extend tool life in demanding environments.

Key Benefits

• 7.5A motor with 11,000 RPM no-load speed for strong, steady performance
• AC/DC switch offers flexibility for different power setups
• Extra-large paddle switch and a compact 2-1/2" barrel grip for easy handling
• Labyrinth construction protects the drive gear and bearings from contamination
• Spindle lock enables quick wheel changes; side handle mounts on either side
• Lightweight and balanced at about 4.5 lbs for reduced user fatigue
• Double insulated motor adds electrical protection
• Includes grinding wheel, wrench, inner flange, wheel guard, and flange
• 1-year limited warranty provides added peace of mind

What’s in the Box

• 4-1/2-inch angle grinder with paddle switch
• Grinding wheel, wrench, inner flange, wheel guard, flange
• Side handle for customizable grip

Performance and Real-World Use

In metal fabrication and maintenance tasks, this grinder maintains a confident pace without requiring frequent re-engagement of the trigger, thanks to the large paddle switch and steady torque. The compact form factor helps you work in tight corners, while the reliable spindle lock speeds wheel changes between jobs. The tool’s weight distribution contributes to smoother operation when edging, beveling, or removing flaky rust and coating from metal surfaces.

Durability and Maintenance

Designed to withstand busy shop floors, the Makita 9557PB’s labyrinth seal protects internal components from dust and debris. Regular checks on the electrical components and seals can help preserve cutting efficiency. The grinder’s double insulation and the 1-year warranty offer practical reassurance for professional use.

Tips for Best Results

• Use the wheel guard and side handle to enhance control in dusty environments
• Schedule routine inspections of the seals and replace worn parts as needed
• Combine with appropriate grinding wheels for metal or masonry tasks