Depends on the spline.
Originally Posted by oldtiffie
A common spline has straight sides -- there are no involute curves involved.
If you're talking about an automotive involute spline, they almost always use a stub form, typically 12/24 DP, or 16/32DP. The numerator defines the diametral pitch, and the denominator is the stub pitch. Involute splines are almost always 30° pressure angle.
By the way, involute splines support a lot more torque than a straight-sided spline, because of their self-centering behavior.
Edit: DP = (Num Teeth + 2)/OD, so I'm getting 26/1.264 = 20.57 DP, which probably means it's not an involute spline.
Last edited by lazlo; 07-30-2009 at 11:15 AM.
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