Frictional Forces on Screws EXAMPLE PROBLEM // Step By Step Process Explained // Equations Included

In this video I go through an example problem of solving for the required torque on a screw to achieve the required compression from the clamp. I go through the problem step by step and give the equations involved.
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[@mathieufranchimont9789]

Hey, thank you for the video. Why did you wrote the radius in mm and then in m in your equations? Thanks in advance, Mathieu.

[@studentengineering]

Great question! The force W was in newtons and I wanted the answer M in newton meters instead on newton millimeters so I converted the radius to meters for that third equation that I wrote.

[@stanjames4548]

when to use when subtracting angle

[@studentengineering]

Great question! This video explains that:
czcams.com/video/fUt9YDNMeRY/video.htmlsi=KpS66fbjFHFyva1J

[@kennethrevilla4163]

why did you sum up the angle? isn't it a self locking screw?

[@studentengineering]

When the impending motion is in the opposite of W then it doesn’t matter whether or not the screw is self locking.

[@jjjjjjjjj2476]

Why didn't you convert the radius when calculating the thether angle?

[@studentengineering]

Convert the radius to what?

[@jjjjjjjjj2476]

@@studentengineering isn't metres?

[@studentengineering]

The radius can stay in millimeters. It doesn’t have to be changed to meters.

[@anjalpaudel8713]

@@jjjjjjjjj2476 Anything thats inside a trig function must be unitless, so the millimeters actually cancel out so he doesnt have to convert.