Shear gear and C-Clip - Standard With Models 4000,4100,7500.
Why build a Brake Lathe with all these steel durable components and then put one little plastic one in the middel?
Designed as a mechanical fuse, this gear will fail before major damage is done to the lathe when something goes wrong such as selecting drum feed with a rotor mounted.
This little safety devise is one of the central components that help make Ammco Brake Lathes last so long.