1) Ukuchaneka kwejenali ephambili kunye nejenali yentonga yokudibanisa, oko kukuthi, inqanaba lokunyamezela ubungakanani bedayamitha lidla ngokuba yi-IT6 ~ IT7; ukutenxa umda wobubanzi bejenali ephambili + 0.05 ~ -0.15mm; umda wokutenxa kwiradiyasi yokujika yi ± 0.05mm; Umda wokutenxa kwi-axial dimension yi-± 0.15 ~ ± 0.50mm.

2) Ibakala lokunyamezelana kubude bejenali yi-IT9 ～ IT10. Ukunyamezela imilo kwijenali, njengokungqukuva kunye ne-cylindricality, ilawulwa ngaphakathi kwesiqingatha sokunyamezela kwe-dimensional.

3) Ukuchaneka kwesikhundla, kubandakanywa ukuhambelana kwejenali ephambili kunye nejenali yokudibanisa intonga: ngokubanzi ngaphakathi kwe-100mm kwaye akukho ngaphezu kwe-0.02mm; i-coaxiality yeejenali eziphambili ze-crankshaft: 0.025mm kwiinjini ezincinci zesantya esiphezulu, kunye neenjini ezinkulu nezisezantsi 0.03 ～ 0.08mm; indawo yejenali yentonga yokudibanisa ayikho ngaphezulu kwe ± 30 ′.

4) Uburhabaxa bomphezulu wejenali yentonga yokudibanisa kunye nejenali ephambili yecrankshaft yiRa0.2 ～ 0.4μm; uburhabaxa bomphezulu wejenali yentonga yokudibanisa, ijenali engundoqo, kunye nefillet yoqhagamshelo lwecrankshaft yiRa0.4μm.
Ukongeza kwezi mfuno zobugcisa zingentla, kukho imimiselo kunye neemfuno zonyango lobushushu, ukulinganisa okuguquguqukayo, ukuqinisa umphezulu, ukucoceka kwemingxuma ye-oyile yokuhamba, ukuqhekeka kwe-crankshaft, kunye ne-crankshaft rotation direction.