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Thread: Webley lock screw size

  1. #16
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    Baz, sounds like as good a solution as any. Just for info I found a 50tpi Whitworth thread, well, two of them with 50tpi, one on 95 thou, other on 100 thou. They are or were in the range used for watches & instruments. Smallest was 400 tpi on 10 thou. That would be an interesting one to copy......
    Cheers

  2. #17
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    Webley were renowned for using 'odd' sizes for their screws etc., in particular where they seemed keen on using the odd BA sizes such as 5 & 7.
    As said previously, there was another thread on this very subject some time ago, but, unfortunately, I can't find it in the archives and don't seem to have kept a written record of the resulting findings.

  3. #18
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    Webley lock screw size

    I've always used 6ba in all my restorations, with complete success

    John

  4. #19
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    Think this is right for a rough and ready solution? ...50tpi is as near as damn it 0.5mm thread pitch (50.8tpi) ...cut it with a threading tool ground to a 55 degrees.
    blah blah

  5. #20
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    Quote Originally Posted by trajectory View Post
    Baz, sounds like as good a solution as any. Just for info I found a 50tpi Whitworth thread, well, two of them with 50tpi, one on 95 thou, other on 100 thou. They are or were in the range used for watches & instruments. Smallest was 400 tpi on 10 thou. That would be an interesting one to copy......
    Cheers
    0.25 of a mm, I wouldn't even be able to see it ! Seriously, John Knibbs must have the original dies as they supply these screws.


    Baz
    BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD

  6. #21
    ggggr's Avatar
    ggggr is offline part time super hero and seeker of justice
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    I have just been told that the external thread on the bolt is .180 by 50tpi Whitworth. I will need to tap the hole it goes in in the endcap/guide. Does anybody have such a tap or know where I might get one cheap? I will look on the bay.
    Thanks
    Last edited by ggggr; 20-09-2018 at 09:03 AM.
    Cooler than Mace Windu with a FRO, walking into Members Only and saying "Bitches, be cool"

  7. #22
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    Tracy Tools are unable to supply such a tap, although they did say they could get it made, but at what cost I didn't ask.

    I still have some Senior Pivot Bolts but not the keeper screws.

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