(1) For pulleys with parallel drive shafts, the tolerance of the parallelism of the two axes is (0.15/1000)L (L——the center distance between the two shafts), the wheel width middle plane of the two wheels should be on the same plane, and the tolerance is 0.5mm.

(2) The geometric center lines of the gear teeth of the driving sprocket and the driven sprocket should coincide with the offset error C≤0.015L (L——the center distance of the two sprocket), as shown in the figure.

(3) The initial sag of the non-working side of the chain is adjusted according to 1%~5% of the center distance between the two sprockets.

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