SJS® Super Joint System is a mechanical clutch system that helps prevent motor and gear damage in grinders if the wheel is forced to a stop. The drive shaft from the armature to the drive gear is spring-loaded during normal grinding load. If binding occurs or the wheel is forced to stop, the spring is compressed allowing the drive shaft to slip. The gear tension is minimized while the armature continues to rotate, which helps prevent motor burn-out. SJS® is a mechanical clutch system, not elecronic, so the grinder does not require a re-start if the wheel binds. [Learn More]
Makita’s ¼” SJS™ Die Grinder (model GD0800C) combines a powerful 6.6 AMP motor with motor and gear protection features for longer-lasting grinding performance. The GD0800C features a slide switch for increased convenience.
The GD0800C is equipped with SJS™ , an innovative mechanical system that allows the drive shaft to slip if the wheel suddenly catches or binds. SJS™ is engineered to help protect the gears and motor, and extend grinder life.
The GD0800C is powered by a 6.6 AMP motor that delivers 7,000 – 28,000 RPM with soft start for smooth start-ups. The electronic speed control maintains constant speed under load, and a variable speed control dial allows the user to match the speed to the application. Consistent with other models in Makita’s expanding grinder line-up, the GD0800C features labyrinth construction, a series of channels engineered to capture dust and debris and prevent contaminants from penetrating the gear box and front armature bearing for longer tool life. In addition, the protective zig-zag varnish seals the motor and bearings from dust and debris by creating a barrier under rotation.
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