Makita’s High-Power Angle Grinder Features Variable Speed Control

The Makita 4 ½-inch SJSII high-power angle grinder features a 15-AMP motor that delivers more output and features a variable speed control dial that allows the user to adjust RPM from 2,800 to 11,500 to match the speed to the application.

The high-power angle grinder features SJSII, which uses a leaf spring and cam gear-drive mechanism that is engineered to reduce vibration for increased operator comfort during extended use. Vibration is further reduced by the vibration-absorbing side handle that provides increased comfort on the job.

An electronic controller provides constant speed control that automatically applies additional power to the motor to maintain speed under load. The controller provides soft start, designed to suppress start-up reaction for smooth start-ups and longer gear life. It provides an electronic current limiter which helps protect the motor from overload in high torque applications.

A variable speed control dial enables users to match the speed to the application. Labyrinth construction seals and protects the motor and bearings from dust and debris for longer tool life. The motor fan is designed with enlarged fins for increased air flow and a cooler running motor.

Complete zig-zag epoxy is applied to both sides of the armature coil and a powder coating for protection from debris and longer tool life. Spiral bevel gears make for smoother rotations and a more efficient transfer of energy. Fully aluminum-constructed gear housing provides for better gear alignment and smooth transmission for increased durability and comfort. The grinder has a “tool-less" wheel guard for easy adjustment, and a slide switch with lock-on for continuous use.