Because the extruder has a fast speed, a large torque and a large inertia, there will be serious losses if it is not protected in time once it is overloaded. Because of the particularity of this industry, BMM modular limiters are used on the extruder. (Some of them are called thimble type, and some are called claw type). The biggest difference between this series and other series is that once overloaded, the driving end and transmission end can be completely separated (other series will not be completely separated), and there is no residue. The torque value will not be reset automatically, it needs to be reset manually by knocking on the limiter module with a hammer or other parts.