Bolt Maximum allowable torque
Bolt Maximum allowable torque
(OP)
For a bolt M10 class 8.8 torque recomended is 53Nm. What is the Bolt Maximum awollable torque. thanks
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Bolt Maximum allowable torque
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RE: Bolt Maximum allowable torque
Not even a class 12.9 M8 lubricated is 53 N-M!
Could be as low as 12 N-M for a class 4.8
https://www.swtc.edu/Ag_Power/diesel_engines/lectu...
RE: Bolt Maximum allowable torque
RE: Bolt Maximum allowable torque
je suis charlie
RE: Bolt Maximum allowable torque
gruntguru: True.
RE: Bolt Maximum allowable torque
I am getting 54N.m torque for a grade 8.8 M10X1.5 screw. The equation is T=CDF, were T is torque, C is the friction factor, D is the thread major diameter and F is the tension force. I used a friction factor of 0.15, assuming a lubricated thread. I used 90% of yield strength as maximum stress. This equation assumes a 100% rigid joint. This may or may not be an adequate description of your application.
Your machine design textbook should fill in any of the blanks I have left.
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JHG
RE: Bolt Maximum allowable torque
The maximum allowable torque is just a little bit less than the failure torque of the bolt or joint. That number will depend on your application.