Hi all, was trying to install a grimeca front disc on my p125x. When taking the nut off, it stripped. My fault wasnt aware of the jesus nut thing! Anyway I managed to get it off with a chisel. The thread of the axle doesnt look too bad but I thought I would run a die around it to make everything a little tidier. I assumed it was an M12 and have an m12 nut. Neither nut nor die really want to go on, which has made me think twice. I have searched and cant really find a definitive answer on the thread and nut size. Is it M12 or something else? Any advice is sincerely appreciated.
Only one I know of is on a helicopter main rotor. If it fails, you better start praying...
Jesus nut is a slang term for the main rotor retaining nut or mast nut, which holds the main rotor to the mast of some helicopters. The related slang term Jesus pin refers to the lock pin used to secure the retaining nut. More generally, Jesus nut (or Jesus pin) has been used to refer to any component that is a single point of failure which results in catastrophic consequences.
It’s a primitive locknut that you lock by denting it with a sharp hammer blow to a chisel. Standard on the old p front axel. Pray to Jesus that it doesn’t come loose? Yell “Jesus Christ” when trying to get it off?
Hi all, thanks for all the comments and help here. Thanks for the SIP links. Yes its a 16mm front axle.
The thread on the axle is not great but I will try and find a M12, 1.5mm die that can sharpen things up.
Thanks again for the comments and help.
Yes Jesus Christ when I was getting the nut off for sure. And a lot more Jesus Christs trying to find a die and a new nut!!!!!
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