flat root side fit 30PA spline

[batter1979]

I was wondering if any of you folks could check the tooth thickness and pin measurement values for this program i wrote. I hope I am not asking too much. Here are the output results. I spent a lot of time writing it, so I would like to be able to use it with confidence
Thanks in advance
Jim

ansi 92.2

INPUT:
Class 4
N(Z) 32
Module 3
Term Symbol Result
Spline Length g 44.800
Pitch Diameter D 96.0000
Base Diameter Db 83.1384
Circular Pitch p 9.4248
Tooth Thickness mod See table es 0.0000
Min.Major Diameter, Internal DEI min 100.5000
Max.Major Diameter, Internal DEI max 100.5899
Form Dia. Internal DFI 99.6000
Min.Minor Diameter, Internal DII min 93.2102
Max. Minor Diameter,Internal DII max 93.6202
Max.Major Diameter, External DEE max 99.0000
Min.Major Diameter, External DEE min 98.5900
Form Dia. External DFE 92.6102
Max.Minor Diameter, External DIE max 91.5000
Min.Minor Diameter, External DIE min 91.4101
Cir tooth thickness Sv max 4.7124
Min actual S min 4.6605
Max actual S max 4.6874
Min eff Sv min 4.685
Cir space width Ebsc 4.7124
Min eff Ev min 4.7124
Max actual Emax 4.7643
Min actual Emin 4.7374
Max eff Ev max 4.7393
Max Measurement over pin ext 5.7600 105.2182
Min Measurement over pin ext 104.9671
Min Measurement over pin int 5.184 88.8200
Max Measurement over pin int 88.5239

 

[batter1979]

i got it. If any of you need to design a flat root spline, here is the program. It comforms to ansi 92.2 , and is dead on. To use it properly you will have to enable manual & iterative calculations under formulas in excel

 

[dinjin]

Batter2979,
Thanks for attaching the excel spread sheet.
It looks like you put a lot of work into it.
I kind of wonder if both parts are at Max Material
Condition, if you can assemble them without interference
or press fit.

 

[batter1979]

It took quite a bit of work. And by the way. DO NOT USE THE MACHINIST HANDBOOK FOR A SPLINE. Buy the std. I found numerous typos within the section that if i did not have reference spline data from 92.2 the calculations would have never been correct. Max material is specified by the tol's on the data. By definition, you pick the class of fit H.G.F.E...etc. And no there is not a press fit for this type of spline. It is a flat root side fit. You would want a major dia fit spline if you wanted that sort of thing.