Insimbi yamabhereyitha ebhola ejwayelekile enokuqukethwe kwekhabhoni ne-chromium yakhethwa futhi yaqiniswa ukuze imelane nokucindezela okukhulu phakathi kwento egoqayo namasongo okuthwala.
Ukufaka i-carbonitriding emasongweni angaphakathi nangaphandle kuyinqubo eyisisekelo yokuqinisa abahlinzeki abaningi bama-TPI ball bearings. Ngale ndlela yokwelapha ukushisa ekhethekile, ubulukhuni ebusweni bomgwaqo womjaho buyanda; okunciphisa ukuguguleka ngokufanele.
Insimbi ehlanzekile kakhulu iyatholakala kwezinye zezinhlobo zemikhiqizo yama-TPI standard ball bearings manje, ukumelana okuphezulu kokuguguleka kuyatholakala ngokufanele. Njengoba ukukhathala kokuthintana kuvame ukubangelwa ukufakwa okuqinile okungeyona insimbi, ama-bearings kulezi zinsuku adinga amazinga akhethekile okuhlanzeka.