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  1. Phlegyas

    Involute spline 9H Formula

    I have a Din 5480 Spline on my Blue Print N50 X 2 X 24 X 9H. the 9H is where I can use some assistance. Is 9H the Space width tolerance? is 9 the class? (my 25 hand book only list 4-7) What is the formula that is used to calculate 9H . Any help is much appreciated

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