Torque Coefficient
Torque Coefficient
(OP)
I am trying to estimate the torque that will cause the screw threads to strip out of an aluminum heat sink. I believe I have everything nailed down except for the Torque Coeffecient, K. The value can range from .09 to .35 or so, which makes a huge difference in the failure torque.
Does anybody have a good feel for what a good number would be for zinc-plated screws into A380 cast aluminum?
Thanks for any help,
Shrike
Does anybody have a good feel for what a good number would be for zinc-plated screws into A380 cast aluminum?
Thanks for any help,
Shrike





RE: Torque Coefficient
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Torque Coefficient
There's just not a lot of documentation out there.
Thanks again,
Shrike
RE: Torque Coefficient
RE: Torque Coefficient
He's not a fan of torque tests. He's worried about variations from the driver slipping in the screw head.
Personally, I hate plugging numbers into non-imperical formulas and running with the result.
RE: Torque Coefficient
http://www.dekker.com
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.