Daniel Tyrkiel
Active Member
Hello, I don't post much these days, but I thought this may be useful.
A salesman from nord lock came in to the place I work at the other day to peddle their special washers and showed us a vibration test using various nuts (plain, nyloc, ovalised, and their own of course) and the graph attached is the result. On the vertical is the clamp load of the joint, and on the horizontal is time (of the vibration test).
The results for standard nuts and nylocs and other wonderful but standard fittings got me the chills. Basically they will lose all of the clamping load and the joint will fail at some point.
The only thing that would hold was their thing and split pins. He also showed that a double nut but tightened using the 'top' nut only holds for many times longer than others but will lose the load eventually anyway.
I'm not affiliated with this company, but this being a critical element in aircraft that are to carry us safely and give us pleasure, I thought I'd post it here.
regards
Daniel
A salesman from nord lock came in to the place I work at the other day to peddle their special washers and showed us a vibration test using various nuts (plain, nyloc, ovalised, and their own of course) and the graph attached is the result. On the vertical is the clamp load of the joint, and on the horizontal is time (of the vibration test).
The results for standard nuts and nylocs and other wonderful but standard fittings got me the chills. Basically they will lose all of the clamping load and the joint will fail at some point.
The only thing that would hold was their thing and split pins. He also showed that a double nut but tightened using the 'top' nut only holds for many times longer than others but will lose the load eventually anyway.
I'm not affiliated with this company, but this being a critical element in aircraft that are to carry us safely and give us pleasure, I thought I'd post it here.
regards
Daniel
