Another fastener question: why thru axles are used without nuts and washers?
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- musiclover
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I wonder why thru axles are used without nut on the other end to help to secure it further? There are also no washers most of the times at the "bolt head".
Will any of this improve the reliability of the joint?.. (Provided, of course, one has enough thread and fastener length for it).
Will any of this improve the reliability of the joint?.. (Provided, of course, one has enough thread and fastener length for it).
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- musiclover
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I understand that the drop out acts as a nut. The question is: will an additional nut on the outside of that construction improve the joint? Also, this will allow to use a spring washer on that side which will protect the joint from loosening from vibration on that side.
As for the flat washer on the head side... Will it spread the load better if it is bigger than the thru axle head? Will it ease the torquing / fastening of the joint?..
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You're more likely to damage the threads on your thru-axle by having a nut in addition to the one built into the fork. You're effectively creating a flexible, variable thread pitch interface after all.
- musiclover
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Yes. (We are referring to a 3 year old level of argumentation, are we?)
What is the difference of a normal bolt with two nuts and a thru axle with a spring washer and a nut?.. How do two nuts of the same thread pitch create a variable thread pitch?TobinHatesYou wrote: ↑Sun Oct 24, 2021 4:31 amYou're more likely to damage the threads on your thru-axle by having a nut in addition to the one built into the fork. You're effectively creating a flexible, variable thread pitch interface after all.
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- musiclover
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No, I was not arguing, I recommend educating yourself on the term "argumentation"
Also, my initial questions were not closed, I am trying to understand this joint from mechanical perspective.
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musiclover wrote: ↑Sun Oct 24, 2021 4:54 am
What is the difference of a normal bolt with two nuts and a thru axle with a spring washer and a nut?.. How do two nuts of the same thread pitch create a variable thread pitch?
When you tighten the top nut on a double-nut, it's not pulling the whole bolt through. It is putting excessive loads on the bolt threads. This is undesirable, especially in a system that sees lots of shock/impact/vibration.
- musiclover
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It only puts excessive load on the threads if you are using excessive force when tightening it. If you are using a nyloc bolt which is only done with a minimal tension it could only improve the safety of a joint?.. Or am I wrong?TobinHatesYou wrote: ↑Sun Oct 24, 2021 5:27 amWhen you tighten the top nut on a double-nut, it's not pulling the whole bolt through. It is putting excessive loads on the bolt threads. This is undesirable, especially in a system that sees lots of shock/impact/vibration.
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Are you having issues with thru-axles coming loose?Anyway, a second nut is usually used as a lock nut to prevent accidental loosening of the nut/bolt, or will not 'improve' the joint. The best thing you can do to improve clamping force and retention is torque the thru-axle sufficiently.
- musiclover
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No, I am not having an issue of a thru axle coming lose. I had an issue with a poorly designed derailleur hanger being held on two M4 bolts coming loose and destroying the thread of a hanger. But it's design is similar to a thru axle so a bit easier to explain.TwiggyForest wrote: ↑Sun Oct 24, 2021 5:55 amAre you having issues with thru-axles coming loose?Anyway, a second nut is usually used as a lock nut to prevent accidental loosening of the nut/bolt, or will not 'improve' the joint. The best thing you can do to improve clamping force and retention is torque the thru-axle sufficiently.
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Will the nut on a standard QR be improved by the addition of a second nut?musiclover wrote: ↑Sun Oct 24, 2021 4:00 amI understand that the drop out acts as a nut. The question is: will an additional nut on the outside of that construction improve the joint?
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- musiclover
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The stock nuts had a thread locker from the factory, unfortunately, it did not work.
Isn't QR equipped with a preload lever? I thought it's design is different to a standard thru axle without the preload handle.
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