1) Ukuri kw'ikinyamakuru nyamukuru no guhuza ikinyamakuru inkoni, ni ukuvuga, urwego rwo kwihanganira ibipimo bya diameter ni IT6 ~ IT7; ubugari ntarengwa bwo gutandukanya ikinyamakuru nyamukuru ni + 0.05 ~ -0.15mm; imipaka ntarengwa ya radiyo ihinduka ni ± 0.05mm; Gutandukana kugipimo cya axial ni ± 0.15 ~ ± 0.50mm.

2) Urwego rwo kwihanganira uburebure bwikinyamakuru ni IT9 ～ IT10. Imiterere yihanganira ikinyamakuru, nko kuzenguruka hamwe na silindrike, igenzurwa muri kimwe cya kabiri cyo kwihanganira ibipimo.

3) Umwanya uhagaze neza, harimo kubangikanya ikinyamakuru nyamukuru hamwe nikinyamakuru gihuza inkoni: muri rusange muri 100mm kandi ntibirenza 0.02mm; coaxiality yibinyamakuru nyamukuru bya crankshaft: 0.025mm kuri moteri ntoya yihuta, no kuri moteri nini kandi yihuta 0.03 ～ 0.08mm; umwanya wa buri gihuza inkoni ikinyamakuru ntabwo kirenze ± 30 ′.

4) Ubuso bwubuso bwikinyamakuru gihuza ikinyamakuru nikinyamakuru nyamukuru cya crankshaft ni Ra0.2 ～ 0.4μm; ubuso butagaragara bwikinyamakuru gihuza ikinyamakuru, ikinyamakuru nyamukuru, hamwe na crank ihuza yuzuye ya crankshaft ni Ra0.4μm.
Usibye ibisabwa bya tekinike yavuzwe haruguru, hariho amabwiriza nibisabwa mu gutunganya ubushyuhe, kuringaniza imbaraga, gushimangira ubuso, isuku y’imyobo yinjira mu mavuta, ibice bya crankshaft, hamwe nicyerekezo cyo kuzunguruka.