Upon the theory of hot elastohydrodynamics about part film load bearing, the sliding and rolling friction forces in gear transmission device can be calculated.

In a manual transmission, gears slide along shafts as you move the shift lever from one position to another, engaging various sized gears as required in order to provide the correct gear ratio,.

Gear case of the gearing system and the gliding tailstock are integrative structure, lifting swiftly, operating easily.