Posted by leka on April 12, 2019 at 12:38:17:
In Reply to: DIN 5480 calculation posted by Drew on April 01, 2019 at 16:19:50:
The basic Reference diameter is simply (Teeth+2)x mod, there are exceptions to this rule but this applies to the majority of splines. The Addendum Modification is then calculated as the sum of ((ref dia-(1.1 x Mod)-(Mod x Teeth)) divided by 2, from this the basic Tooth Thickness is (1.5708 x Mod)+(2 x Add Modification x Tan PA). These all apply to the Shaft and any tolerances are relevant to the required fit.