1) Ukunemba kwejenali eyinhloko kanye nejenali yenduku yokuxhuma, okungukuthi, izinga lokubekezelela ubukhulu bobubanzi ngokuvamile liyi-IT6 ~ IT7; ukuchezuka komkhawulo wobubanzi bejenali eyinhloko ngu- + 0.05 ~ -0.15mm; ukuchezuka komkhawulo werediyasi ephendukayo ngu-± 0.05mm; Ukuchezuka komkhawulo we-axial dimension ngu-± 0.15 ~ ± 0.50mm.

2) Ibanga lokubekezelela ubude bejenali yi-IT9 ～ IT10. Ukubekezelelwa komumo kwejenali, njengokuyindilinga kanye ne-cylindricality, kulawulwa phakathi kwesigamu sokubekezelelana kwe-dimensional.

3) Ukunemba kwesikhundla, okuhlanganisa ukufana kwejenali eyinhloko kanye nejenali yenduku yokuxhuma: ngokuvamile phakathi kuka-100mm futhi kungabi ngaphezu kuka-0.02mm; i-coaxiality yamajenali amakhulu we-crankshaft: 0.025mm ezinjinini ezincane ezinesivinini esikhulu, kanye nezinjini ezinkulu nezinejubane eliphansi 0.03 ～ 0.08mm; indawo yejenali yenduku yokuxhuma ngayinye ayikho ngaphezu kuka-± 30 ′.

4) Ubulukhuni obungaphezulu bejenali yenduku yokuxhuma kanye nejenali eyinhloko ye-crankshaft ngu-Ra0.2 ～ 0.4μm; ubulukhuni obungaphezulu bejenali yenduku yokuxhuma, ijenali eyinhloko, kanye nomcu wokuxhuma i-crankshaft ngu-Ra0.4μm.
Ngaphezu kwalezi zidingo zobuchwepheshe ezingenhla, kunemithetho kanye nezidingo zokwelapha ukushisa, ukulinganisa okuguquguqukayo, ukuqinisa indawo engaphezulu, ukuhlanzeka kwezimbobo zokudlula uwoyela, imifantu ye-crankshaft, kanye nendlela yokuzungezisa i-crankshaft.