The case of the exploding grinder, take two

摘要

This issue's Safety File was prompted by a borrowed grinder. A man's forearm was injured when the blade on the handheld, electric grinder he was using flew apart as it spun up. Parts of the blade also cut into the plastic of the grinder housing and the outer insulation of the power cord. The injured man had been preparing to cut metal rivets attaching a broken leaf-spring bracket to the body of a dump truck. The blade involved in the incident was rated for dry cutting at a maximum of 4,400 rpm. The grinder had come without a guard or instruction manual.