1) Daidaiton babban jarida da haɗin haɗin sanda, wato, matakin haƙuri na diamita yawanci IT6 ~ IT7; madaidaicin iyaka na babban jarida shine + 0.05 ~ -0.15mm; iyakacin iyaka na radius na juyawa shine ± 0.05mm; Iyakar girman girman axial shine ± 0.15 ~ ± 0.50mm.

2) Matsayin haƙuri na tsawon jarida shine IT9 ～ IT10. Haƙurin siffa na mujallar, kamar zagaye da cylindricality, ana sarrafa shi a cikin rabin juzu'in juzu'i.

3) daidaiton matsayi, gami da daidaiton babban mujallu da jaridar sanda mai haɗawa: gabaɗaya a cikin 100mm kuma bai wuce 0.02mm ba; da coaxial na babban mujallolin crankshaft: 0.025mm ga kananan high-gudun injuna, da kuma manya da ƙananan-gudun injuna 0.03 ~ 0.08mm; Matsayin kowace jarida mai haɗawa ba ta wuce ± 30 ′ ba.

4) Ƙaƙƙarfan fuskar bangon jarida mai haɗawa da babban jarida na crankshaft shine Ra0.2 ~ 0.4μm; Ƙaƙƙarfan farfajiyar mujallar sanda mai haɗawa, babban jarida, da fillet ɗin haɗin crank na crankshaft shine Ra0.4μm.
Baya ga buƙatun fasaha na sama, akwai ƙa'idodi da buƙatu don kula da zafi, daidaitawa mai ƙarfi, ƙarfafa saman ƙasa, tsabtar ramukan ramukan mai, fasa crankshaft, da jujjuyawar crankshaft.