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Author Topic: crankshaft nut  (Read 271 times)

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Offline saluki42

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crankshaft nut
« on: 21 Apr 2021 at 13:39 »
Hi looking for help again with my Model Z restoration. Reassembling the crankcase all was going well till I found that the crankshaft pinion nut is missing. Having checked the thread is 5/8" x 20tpi which appears to be a non standard size has anybody any experience of trying to source a replacement for that nut.

Chris
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Offline eddie

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Re: crankshaft nut
« Reply #1 on: 21 Apr 2021 at 14:36 »
Chris,
           Try LDMCC postwar spares - the nut for a Mark rear wheel spindle is 5/8" x 20 tpi.

  Regards,
                 Eddie.
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Offline EW-Ron

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Re: crankshaft nut
« Reply #2 on: 21 Apr 2021 at 15:03 »
20 Threads per inch is Coarse Cycle Thread.

As against 26 tpi, which is Cycle Thread in (mostly) smaller sizes.
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Offline saluki42

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Re: crankshaft nut
« Reply #3 on: 21 Apr 2021 at 16:15 »
Thanks for the help, I'd forgotten all about the larger BSCY threads, so used to using the smaller 26 tpi sizes. Found a supplier around £1.20 each

Thanks again
Chris
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