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Cycle thread

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Cycle thread

Post  FrankG on Fri Sep 28, 2018 9:37 pm

Hi all, I know it is 26TPI but is it 55 degrees.

Frank

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Cycle thread angle

Post  piston 197 on Sat Sep 29, 2018 6:02 am

No, British Cycle threads are 60 Deg. the same as ISO Metric threads and unlike other threads BSF,BSW etc which are 55 Deg.
Cycle 1/4" x 26TPI thread is the same pitch as 1/4 x 26TPI BSF and a 1/4" BSF bolt will go into a 1/4" cycle thread nut, but not the other way round, albeit very slightly slack, other sizes of BSF and BSW are different TPI to cycle , it is just 1/4" where the TPI is the same as Cycle
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Re: Cycle thread

Post  FrankG on Sat Sep 29, 2018 8:09 am

Thanks John

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Re: Cycle thread

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