shimniok wrote:Since they didn't teach us comp E's how to calculate clamping force and since I am way to lazy to try and figure it out I will just say, over think it until you're sure then git-r-done! I'm sure your solution willbe rock solid!
Since everyone wants to know... check out this website http://www.engineersedge.com/calculators/torque_calc.htm
Input torque is 400ft-lb * 12 in/ft = 4800 in-lb, thread major diameter is around 1.25" and .20 is friction factor for unlubricated threads. Result is 19,200 lb of clamping force.
Nikkormat wrote:Maybe you could design a spacer with a set screw instead of relying on the transfer case?
The problem is that you can't tighten the set screw once it is in place because there is a huge schroud over the tail shaft. There are "solutions" on the market that have two set screws and the reviews are terrible. The tailshaft is not made for a set screw either so it is basically the same problem that the spanner nut has just "moved" further down the shaft! Vibration loosens the set screw and you are back to square 1.