The GPM MG5017TS is produced from 20Cr steel with a hardening black treatment to increase surface strength and extend operational life. This 17-tooth pinion is specified for a 1.0mm module and a 5mm motor tooth diameter, and it secures via a round bore with two 4x4 set screws for reliable mounting. The combination of material choice and heat treatment delivers a robust replacement pinion suitable for high load conditions in 1/8 scale applications.