bb2fish:
How is this nut a "lock nut" ? Looks like a plain old nut made out of stainless steel.
In the PDF document, The geometry of one side of the nut is tapered differently on the outer diameter of the nut (where the wrench flats are) - but I don't get it...what makes this "lock"? Are the threads tapered on the inner diameter where the bolt engages?? Or is there some softer material (but still stainless) on the insert?
Shin09:
I think its the second nut (half size nut) for a 2 nut, lock nut setup. But I could be wrong.
Mojo Jojo:
There compressed on one side of the threads so as you crank them on they get harder to turn. Axle spring bolts are like this and are pressed hard enough it leaves marks on the presses side. Think about heating and flattening a pvc tube fitting then ram the occasional in, it stays there if you can get it to penetrate into the flatter end.
Edit: you can actually see the compression dimples on the nut in the above photo...... no not my avatar !
rogerdodger:
--- Quote from: Mojo Jojo on July 11, 2019, 11:25:43 AM ---There compressed on one side of the threads so as you crank them on they get harder to turn. Axle spring bolts are like this and are pressed hard enough it leaves marks on the presses side. Think about heating and flattening a pvc tube fitting then ram the occasional in, it stays there if you can get it to penetrate into the flatter end.
Edit: you can actually see the compression dimples on the nut in the above photo...... no not my avatar !
--- End quote ---
exactly, "Uniquely shaped threads provide a vibration resistant friction fit, so the nut stays put. These all metal locknuts withstand higher temperatures than nylon insert locknuts. Top thread section is deformed to create two or three locking zones; they start easily by hand, then must be wrenched into final position."
I knew these existed for high vibration/temperature applications (the big block in my 68 Camaro used them to hold/adjust the valve rocker arms), but I didn't know they were available in SS until someone on Youtube tipped me off... ;D