Spline Rolling
 

When is rolling appropriate?

Mighigan Automatic can roll shafts as coarse as 16/32 pitch with a minimum of 17 teeth.

Spline rolling a 45 inch axle shaft.  
 
Spline rolling a 45" axle shaft with 36 teeth.
 
Material Hardness
The maximum yield strength and hardness of material which can be economically cold formed varies according to the pressure angle. Here are the approximate limits:
P. A.
Tools
Yield Strength
Approx. BHN
30 degrees
Unpeened
50 kg/mm2/75,000 PSI
220
30 degrees
Shot Peened
60 kg/mm2/75,000 PSI
265
45 degrees
Unpeened
90 kg/mm2/75,000 PSI
365
37-1/2 degrees
Unpeened
85 kg/mm2/75,000 PSI
340
speedo gear, rolled helical grooves, hobbed teeth
A speedo gear with rolled helical oil grooves and gear lock, hobbed teeth.
Spline-rolled shafts  
Spline-rolled shafts ready to go.
 
Michigan Automatic Turning Inc.
1045 Durant Dr, Howell, Michigan 48843  
517-552-3100  info@michiganautomaticturning.com