轴承

(mechanical) bearing

axis / axle / spool (for thread) / roller (for scrolls) / classifier for calligraphy rolls etc

see 壓軸戲|压轴戏[ya1 zhou4 xi4] / Taiwan pr. [zhou2]

surname Cheng / Cheng (c. 2000 BC), third of the legendary Flame Emperors 炎帝[Yan2 di4] descended from Shennong 神農|神农[Shen2 nong2] Farmer God

to bear / to carry / to hold / to continue / to undertake / to take charge / owing to / due to / to receive

pin bearing

main bearing

ball bearing

roller bearing