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Spokesmann
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Joined: 07 Jun 2007
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Location: Plymouth, UK.
PostPosted: Tue Oct 16, 2007 10:58 am    Post subject: Thread sizes Reply with quote
Use this thread (get it!) for commonly asked questions relating to thread sizes for Mamod or Bowman models for example.
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avenger
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Joined: 14 Jun 2007
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Location: West Midlands
PostPosted: Tue Oct 16, 2007 1:11 pm    Post subject: Reply with quote
Mamod new type safety valve and whistle is ¼ X 26 TPI = ¼ BSF or ¼ Brass both imperial threads.
Mamod water level plug is 2BA again imperial thread.
Mamod Trunnion bolt 1/8 X 40 TPI = 1/8 whit again imperial thread.
Mamod older type safety valve 3/8 X 26TPI = 3/8'' Brass again imperial thread.
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Last edited by avenger on Tue Oct 16, 2007 7:02 pm; edited 1 time in total
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steamyjim
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PostPosted: Tue Oct 16, 2007 4:08 pm    Post subject: Reply with quote
Wilesco boiler fittings. 6mm
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John Chapman
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Joined: 13 Jun 2007
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Location: Cornwall
PostPosted: Tue Oct 16, 2007 5:03 pm    Post subject: Reply with quote
This is one very useful thread, thanks for the info guys.
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SillyBilly
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PostPosted: Tue Oct 16, 2007 7:22 pm    Post subject: Reply with quote
Screws used to construct locos = 6BA
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steamyjim
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PostPosted: Mon Nov 12, 2007 9:11 pm    Post subject: Reply with quote
Threads on uprated Mamod loco safety valve.

1/4 26TPI to fit into boiler.

1/4 40TPI to fit into regulator
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John Chapman
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PostPosted: Tue Nov 13, 2007 12:05 pm    Post subject: Reply with quote
SillyBilly wrote:
Screws used to construct locos = 6BA


Which make of locos?
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steamyjim
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PostPosted: Tue Nov 13, 2007 7:22 pm    Post subject: Reply with quote
Mamod Wink
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