All shaft supports are roller bearings. Materials for the shafts are alloy steel.
Forced lubrication is used for all chains.
Grooved drum: there are ventilating air tube clutches at the high/ low speed end of the drum. Circulated water forced cooling mode is adopted for brake hub (the brake disc of disc brake uses circulated water forced cooling or air cooling) which has been surface quenched with good wear resistance long service life.
Sprocket tooth profile surface has been quenched at the intermediate frequency. All shifting clutches are in volute spine gear clutch.
The main brake is band brake or hydraulic disc brake. Auxiliary brake has been equipped with eddy electromagnetic brake or EATON brake.