The Makita 5 in. SJS II High Power Angle Grinder (GA5042C) combines power， convenience， comfort and motor-protection features for longer-lasting industrial performance. It is ideal for cutting， grinding ferrous metal， paint and rust removal， shipyard maintenance， metal polishing， general steel grinding， auto repair work， cutting brick and masonry， restoration work and more. The GA5042C is equipped with SJS II， a mechanical gear drive system to help prevent motor and gear damage by dampening the force on the gear when the wheel is forced to stop. SJS II is also features a leaf spring and cam gear drive mechanism that is engineered to reduce vibration for increased operator comfort during extended use. The 12 Amp motor delivers 2，800-11，000 RPM for versatility and maximum productivity. Labyrinth construction protects the motor with a complex set of channels， prohibiting dust and contamination from entering the motor. Additional protection features include a Zig-zag epoxy applied to both sides of the armature coil and a powder-coating to the field. This forms a barrier under rotation and is engineered to protect from dust and debris penetration for longer tool life.

SJS II provides a mechanical gear drive system to help prevent motor and gear damage by dampening the force on the gear when the wheel is forced to stop

SJS II provides a leaf spring and cam gear drive mechanism that is engineered to reduce vibration for increased operator comfort during extended use

Vibration absorbing side handle provides increased comfort on the job

Electronic controller provides constant speed control which automatically applies additional power to the motor to maintain speed under load

Electronic controller provides soft start which suppresses start-up reaction for smooth start-ups and longer gear life

Electronic controller provides an electronic current limiter which helps protect the motor from overload

Variable speed control dial enables user to match the speed to the application

Labyrinth construction seals and protects the motor and bearings from dust and debris for longer tool life

Zig-zag varnish protects the armature coil from dust and debris for longer tool life

Spiral bevel gears for smoother rotations and a more efficient transfer of energy

Tool-less wheel guard for easy adjustment

Slide switch with lock-on for continuous use