The BCHM12 is a round head stud-type ball roller or ball transfer unit typically featuring a stainless steel body and main ball, designed for smooth omnidirectional movement and upward load support. Model BCHM12 Brand ZH Material Chrome Steel precision P0 P6 P5 P4 Product Description BCHM12 typically refers to a ball-head bolt type universal ball roller (ball transfer unit), which is not a traditional rotary bearing, but a universal rolling component used for material