Trying to identify Spline standard

[ftjandra]

I am trying to help a friend of mine locate a splined shaft for a constant velocity bearing (Rockford part# 71L-018 or 71L-70). I asked Rockford for the specs and this is exactly what they replied with:

18 teeth
24/48 pitch
45 degree pressure angle

reference only:
0.997" over 0.130 pins
0.800 major diameter

I have absolutely no experience dealing with splined shafts, so any help would be great. From my research so far, it looks like 18 teeth is not an ANSI standard? Then, I came across DIN 5480, 5481, and 5482 and pretty much got confused.

Supposedly, these bearings were specially made for Siemens, but I am not 100% certain on that.

Basically, I am trying to figure whether there is an off-the-shelf splined shaft that exists, or whether I would need to get one custom machined.

Any help is appreciated.

 

[chicopee]

I have been checking my Design and Production Kent Engineering and my Machinery Handbooks and it appears that the pitch 24/48 is used with ASA B5.15-1946 and ANSI B92.1-1970 involute splines, and SAE 1949 involute serrations.
The tooth cross section of a spline is similar to a spur gear design and much of their design formulae and nomenclature are similar.
Try to reference a more recent engineering handbook since my books are a little old as you may get more info on the spline of interest.
It seems to me that your friend's inquiry relates to front wheel drive constant velocity joints.