主动小锥齿轮滚珠轴承 bevel drive pinion ball bearing
驱动装置采用轴装式齿轮减速机与主动滚轮直联传动，结构紧凑，机械效率髙。
Driving device uses shaft type reduction device directly connected to capstan idler, its construct is compact and mechanical efficiency is higher.
焊接滚轮架的主动轮与从动轮上各有两只滚轮，选用金属材质的滚轮，这样就可以大大提高本焊接滚轮架的承载能力。
The driving wheel and the driven wheel welding roller frame each have two wheels, the wheel of metal material, so it can greatly improve the bearing capacity of the welding roller frame.
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