Because the belt wheel and gear in the manual to find that the diameter of the wheel hole must be greater than 20, and the shaft and bearing matching, so the bearing between the shaft neck using the same shaft neck, and gear and gear and gear and bearing between the convex edge, so each shaft using the same size, so can simplify the shaft processing process, more convenient for maintenance and assembly, so the shaft and gear wheel holes are d- 45mm, four-axis bearings are 45mm bearings. Because the bending force that can be tolerated by this machine is small, it is not necessary to do the bending moment, only the necessary torque core.
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