die to clean axle threads

(Dennis Schoenmaker) said:

Hello

I have an old GT BMX hub with the axle threads all messed up from the fork, making dissassembly and
adjustment difficult. Using a ruler I think the threading of the axle is 5/16" 24 tpi which is
listed in Barnett's manual. However I can not find a replacement in any of the local shops or on
the internet. Does any one know if I can use a standard 5/16-24 UNF die to clean up the threads on
the axle?

If you're SURE the axle is threaded 5/16 x 24 then no problem, however a caliper and a thread gauge
is better than a ruler as a way to find out. Assuming the threads are only messed up where they
contacted the fork, then the die should thread on easily for the first couple of turns. If not,
perhaps it's the wrong size.

jeverett3<AT>earthlink<DOT>net home.earthlink.net~jeverett3Open ↗

(Dennis Schoenmaker) said:

I have an old GT BMX hub with the axle threads all messed up from the fork, making dissassembly
and adjustment difficult. Using a ruler I think the threading of the axle is 5/16" 24 tpi which is
listed in Barnett's manual.

BMX hubs are either 3/8"-24 or 3/8"-26. The former is a UNF thread and the latter a bike-specific
British [censored] thread. Check by meshing against an axle of known thread pitch.

If you are sure that what you have is a 5/16" axle, I would suggest buying a new axle kit (with
cones and locknuts) in a more normal size. As long as you approximately match the diameter and taper
of the bearing surfaces on the cones, you'll have no problem.

If you've got a UNF-threaded axle, yes you can use a die to chase the threads.

Chalo Colina

Dennis Schoenmaker said:

Hello

I have an old GT BMX hub with the axle threads all messed up from the fork, making dissassembly
and adjustment difficult. Using a ruler I think the threading of the axle is 5/16" 24 tpi which is
listed in Barnett's manual. However I can not find a replacement in any of the local shops or on
the internet. Does any one know if I can use a standard 5/16-24 UNF die to clean up the threads on
the axle?

Thanks for your help, Dennis Schoenmaker

take it to a good LBS, they will have the 'chaser' you need.

Quoted message said:

On 9 Apr 2003 06:02:12 -0700, [email hidden] (Dennis Schoenmaker) wrote:

Quoted message said:

Quoted message said:

I have an old GT BMX hub with the axle threads all messed up from the fork, making dissassembly
and adjustment difficult. Using a ruler I think the threading of the axle is 5/16" 24 tpi which is
listed in Barnett's manual. However I can not find a replacement in any of the local shops or on
the internet. Does any one know if I can use a standard 5/16-24 UNF die to clean up the threads on
the axle?

Try a couple of good quality 5/16-24 nuts on the axle just to check the thread size. If they fit
okay, then try the die. If it is the right size it will not remove any significant material until it
gets to the damaged area.

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Jim Adney [email hidden] Madison, WI 53711 USA
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a nice new thread file plus (a) clean surface plus loctite is inexpensive and of utility. if you go,
dip the die in linseed before storing. can one buy 10x1 metric axle dies inexpensively and where?