Author Topic: Sometimes too much length is a bad thing.....  (Read 198 times)

Online orabanda

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Sometimes too much length is a bad thing.....
« on: 16.05. 2019 14:28 »
That got your attention!

Making a clutch for a Shooting Star under construction. Using the standard BSA clutch crowded roller bearing arrangement.

I trial fitted the clutch to an A10; there was a problem.

The hub turned freely until the centre nut was tightened; then it would bind and release as rotated; notchy.

I checked all the obvious interference areas, but couldn't find the cause.

Then decided to get back to basics, and measured the length of each 1/4"roller with a micrometer, and found the problem,

Two of the rollers (bought as a set) were 0.008" longer.

Replaced them, and now the clutch turns freely!

A reminder to check everything.


Richard

Offline A10 JWO

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Re: Sometimes too much length is a bad thing.....
« Reply #1 on: 16.05. 2019 18:15 »
My 4 new clutch springs were all different lengths, one by 1/4". Says it all. 

Offline RDfella

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Re: Sometimes too much length is a bad thing.....
« Reply #2 on: 16.05. 2019 19:14 »
When you have to check other people's work it doesn't say much for their quality control or attitude.
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.

Offline IVO

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Re: Sometimes too much length is a bad thing.....
« Reply #3 on: 21.05. 2019 14:33 »
 Reminds me of Aristotle's - Pleasure in the job puts perfection in the work.
   
 Ivo