We recommend using the M4 steel mounting screw to mount IG42 motors. We use these in our IG42 DB Robot Platform when mounting through two 1/8" thick plates.
This is the chain and sprocket kit for the IG42-DB4 robot platform. It includes 10 tooth and 15 tooth sprockets, 6 feet of chain, and 4 connecting links.
Use these roll pins to fix sprockets to a shaft and keep them locked in place.