Fixing a stripped thread

[mickle]

what is so special about this axle?

every bike that has wheels will have an axle so will not another one fit?

the important thing is the cones and bearings - the diameter of these should match the cone in the hub but I reckon you could get something pretty close that would work.

as they say ^^^ cutting the thread to be square requires it to be done on a lathe. If the replacement costs £ 120 !!!! , then maybe you should get the shop to make a few, set up would be the main cost and then punt them off on ebay to recover your costs.

It'sa stud axle off of a tricycle.

This thread is done, I have posted the solution.

 

[bonj2]

Some bike shops also have a machine that can do that, I got a brake bolt that had pretty much the exact same thing happen to it done at JE james. Perfect now. So might be worth trying a LBS.
For an internal thread you can get a helicoil fitted, but for just a nut you would be better just getting a new nut as a nut's a nut pretty much.

 

[tyred]

A nut is not just a nut. There are many different thread sizes and types.

 

[bonj2]

I mean if you can get it from B&Q it's nothing special.

 

[very-near]

A nut is not just a nut. There are many different thread sizes and types.

very much so. An engineering firm should have a set of thread gauges which you can use to ascertain the thread form.

 

[ChrisKH]

I've seen much worse. You may be able to touch it up enough to get the nut started with a hacksaw blade and small half-round file. Starting on the inside at the last undamaged thread, cut into it with the hacksaw blade, picking out the groves of the thread. Work carefully, and you should be able to get the nut to start. Ideally, if you could find another "plain" nut of the right thread size, cut across it to form a type of die nut and screw it on first, reversing it a 1/4 turn every 1/2 turn. This should be good enough to be able to screw on the nut then.

Yes, I've done this before as well. Fiddly as hell, but it can work.

 

[grhm]

what is so special about this axle?

as they say ^^^ cutting the thread to be square requires it to be done on a lathe. If the replacement costs £ 120 !!!! , then maybe you should get the shop to make a few, set up would be the main cost and then punt them off on ebay to recover your costs.

It's a trike axle, and apparently pashley change the design at some point. I believe my trike is a late 80's/early 90's model and I'm not sure there a market for replacement axles for that age trikes.

Here's a piccie showing (most of) the width of the axle.

 

[02GF74]

ok ^^^ gotcha.

you can buy threaded bar in 1 m and longer lengths - dead cheap - just a question of how you would attach the centre sprocket and if the thread is correct for the cones.