Torque Specifications

[Shel_B]

How do engineers determine the torque specifications for the various nuts and bolts that go into a machine, such as a car, plane, truck, etc? What is the underlying calculation(s)? What factors are considered? Thanks!

 

[Rand]

could you be more specific?

or do you want a generic dumbed down answer?

 

[Imp4]

So in order to have a valuable conversation, it is imperative that you google the question and read the entirety of the first five results.
Once you have digested that information in all of its wonderful error filled entirety, then we can start a discussion.
Otherwise we are just going to have a discussion about your A B C's.

 

[Shel_B]

Since I'm ignorant of such things, a dumbed down answer might be a good starting point, and it may lead me to more specific or intelligently posed questions.

 

[Rand]

Since I'm ignorant of such things, a dumbed down answer might be a good starting point, and it may lead me to more specific or intelligently posed questions.

punching this into google yielded some good basic results
https://www.google.com/search?clien...ecifications&sourceid=opera&ie=UTF-8&oe=UTF-8

 

[atikovi]

You can find charts with general torque specs based on diameter, thread pitch and plating. https://www.imperialsupplies.com/pdf/A_FastenerTorqueCharts.pdf The engineers will tweak those numbers further by taking into account the material of the fastener and what it's going into, the number of threads in the hole or fastener, temperature exposure, etc.