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0.15 friction is used for static friction on steel/steel, 0.18 if lubricated - this has been taken as standard. The application is dry hence 0.15 We wouldn't yield the sleeve material.

I am looking for some help. I have a internal tapered sleeve that needs to be pushed up a solid tapered shaft (similar to old propellor methods). I need to push it up by 1mm. I am presuming that the thickness of the sleeve in the middle is 8mm, and the length is 115mm. The angle is 5.9 degrees...

Dear All, I am after guidance, and would like someone to check to see of I am on the right lines. I have need a fastener that needs a preload value 70% of its yield. Material has a yield of 600 MPa, therefore 70% is 420 MPa. The Cross-Sectional Area of the fastener is 1000mm2 (smallest...

I had a look at Nordlok, but the size they do is up to M39 :(

I am need of preventing a M42/M45./M48 Nut from coming loose during operation whilst underwater on a pumping application. It will be exposed to seawater and vibration, so has to be resitive to saltwater corrosion. 316,304 and 303 Stainless Steels can be problematic under those conditions due to...

Is there anything else that could improve accuracy?

As accurate as possible Desertfox. I am trying to relate some pre calculated figures against actual tensioned figures, and trying to get my head round how the theoretical figures are calculated. What is apparent is that the calculated figure is marginally lower than the actual tensioned figure...

Thanks desert fox. The cross sectional area would be the thread dia? Undercut of thread? Or the bolt area in the hole I.e 60mm? Thanks

John, it's not a classroom assignment. I am trying to put a theoretical equation to a mechanical test. I tried to implement the equation of Dl= FL -- EA But it seems a little way off, but not much. F = 750 kN L = I have turned the whole bolt length, or the clamping length between the...

Hi people. I have a problem in that I need to look at. I have a bolt that is threaded both ends with nuts on the end. The bolt goes through two coupling halves. The middle portion is bigger in diameter of the thread, a slight clearance in the hole. The bolt is hydraulically tensioned, and then...