In the national standard GB5106—85 “Cylindrical straight-toothed open-line spline gaugeâ€, the positional tolerance of the spline is replaced by the “index tolerance†instead of the “circumference tolerance of the weekâ€. Let me talk about my understanding. 1. Define the cumulative error of the weekly joint â–³F_(p∑): On the indexing circle, the sum of the two absolute values ​​of the maximum positive and negative errors of the ipsilateral tooth profile deviating from the theoretical position is shown in Fig. 1.
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