View Single Post
      11-09-2012, 08:27 PM   #21
M3SQRD
Colonel
 
M3SQRD's Avatar
 
Drives: E92 M3s, R56 Cooper S
Join Date: Jun 2009
Location: EC

Posts: 2,452
iTrader: (2)

Quote:
Originally Posted by bigjae1976 View Post
Lol...anytime! Still, my apex and OEM wheels have a taper on the back, appears to be at least 3mm. So is 2mm of engagement fine? I'm not an engineer but I know enough to make me dangerous.
2 mm = ~80 mil...In actually, the shear load is only transferred over a very short distance (i.e., the entire hub length is not effective; the spacer acts like a non-structural "gap" which increases the bending stress at the hub root). The minimum distance required for the shear load to transfer from the wheel to hub, as a quick sizing rule-of-thumb, is when the effective bearing stress is equal to the bearing yield strength of the material. If you are afraid of 2 mm of lip engagement to transfer < 2-2.5k lbf then you don't want me to get started on the structural design (static, dynamic, fatigue and fracture) of aircraft and spacecraft
M3SQRD is offline   United_States
0
Reply With Quote