could anybody help me by providing an internal involute spline data sheet similar to the attached picture for an 1-3/8" splined shaft with 21 teeth, 16DP and 30 degree pressure angle. Thanks for your help.

enter image description here


From Machinery's Handbook for a flat root side fit spline. There are a few other different styles, this is what I use. This is a class 5 tolerance (typical industry level) per ANSI B92.1-1970


  • $\begingroup$ thank you, that is help full. $\endgroup$ – Jakob Arent Dec 11 '19 at 19:39
  • $\begingroup$ would you be willing to also provide the external spline information of an 1.375-21T spline. That would speed things up at my end. $\endgroup$ – Jakob Arent Dec 11 '19 at 20:00
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    $\begingroup$ @Jakob Arent - he’s provided you with the source, so you can research for yourself! This is the first result on google for “Machinery's Handbook PDF” library.uc.edu.kh/userfiles/pdf/… $\endgroup$ – Jonathan R Swift Dec 11 '19 at 21:05
  • $\begingroup$ Ok, thanks. And yes you are right with a bit of research and calculation i could have found out the most of them. But i am still struggling with the max. actual space width and min actual width and cant find out what is the right way. Even after researching on some websites there seams to be no clear answer. Could somebody explain how it works? $\endgroup$ – Jakob Arent Dec 12 '19 at 13:51
  • $\begingroup$ Drawing data - external spline Flat root side fit Number of teeth 21 ea Diametral pitch 16 32 pitch/stub Pressure angle 30 deg Base diameter 1.1367 in REF Pitch diameter 1.3125 in REF Major diameter 1.375 in Form diameter 1.246 in Minor diameter 1.228 in MIN Pin diameter 0.1200 in Min over 2 pins 1.4929 in Max over 2 pins 1.4947 in Max actual tooth thickness 0.0967 in Min actual tooth thickness 0.0955 in $\endgroup$ – jko Dec 12 '19 at 21:21

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