Grinding machines with kickback protection

Kickback protection

— a comprehensive solution that reduces tool jamming and twisting when the disc gets stuck in materials (concrete, metal, stone). This is achieved in two ways: a mechanical safety clutch and electronic systems. The clutch (e.g., S-automatic from Metabo, SJS/SJS II from Makita) disengages the drive when torque suddenly increases, saving the gearbox and the wrist—preventing the tool from "shooting" out of hands and breaking gear teeth. Electronics (Bosch KickBack Control, DeWalt E-CLUTCH, Hilti ATC, HiKOKI/Hitachi RFC, Milwaukee AUTOSTOP, Makita AFT) monitor current and accelerations, instantly shutting down the engine and often working with a brake to quickly stop the disc. In comparison: the clutch works even without power and provides smooth "slippage," but the disc briefly continues to rotate; electronic protection completely shuts the motor off, but it requires functioning electronics and sometimes a restart. In practice, this is crucial during groove cutting and rebar cutting, where the risk of jamming increases: with protection, the operator controls the tool, reducing hazardous jerks and protecting the gearbox—whether it's a compact 125-mm cordless grinder or a powerful 230-mm with a power cord.