Ibyuma bisanzwe by’imipira bifite karuboni na chromium byatoranijwe kandi bikomera kugira ngo bihangane n’igitutu gikomeye kiri hagati y’ikintu kizunguruka n’impeta z’imipira.
Gukoresha karuboni ku mpeta z'imbere n'inyuma ni inzira y'ibanze yo gukomera ku batanga ibyuma bya TPI ball bearings. Binyuze muri ubu buryo bwihariye bwo kuvura ubushyuhe, ubukana ku buso bw'umuhanda wo ku rubyiniro buriyongera; ibi bigabanya kwangirika uko bikwiye.
Ibyuma bisukuye cyane biraboneka muri bimwe mu bikoresho bya TPI standard ball bearings ubu, bityo bikaba ari byiza cyane. Kubera ko umunaniro wo gukoraho akenshi uterwa n'ibintu bikomeye bitari ibyuma, muri iki gihe bearings zisaba isuku idasanzwe.