[modeleng] Re: unknown thread
- From: "Clif Walker" <clif.gwr@xxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Sat, 16 Oct 2004 21:02:53 +0100
HI All,
As I mentions in a previous message I seem to have gone back to work doing
some Plumbing.
Just my luck the job that I am working on has got Screwed Copper pipes all
over the place which I think stopped being used in the Thirties.
The threads are 20 TPI so there are absolutely no matching pipe fittings
these days to join onto it.
So that I can make connections onto the stuff from modern metric pipe, I am
now having to make adaptors with threads cut in my Lathe .
So hows that for an up to date Plumber.
I have a feeling that on Locos threaded Copper is used so how do the
preservation people get on or do they have to thread cut as well?
Regards
Clif
----- Original Message -----
From: "alanjstepney" <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Friday, October 15, 2004 4:37 PM
Subject: [modeleng] Re: unknown thread
> There have been many unusual threads throughout the years,
> I believe that Lanchester cars used a 23 TPI (or was it 25 tpi) thread but
> of Whitworth form.
> alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> www.alanstepney.info
> Model Engineering, Steam Engine, and Railway technical pages.
>
>
> ----- Original Message -----
> From: "Phill Smith" <steam@xxxxxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Friday, October 15, 2004 4:41 PM
> Subject: [modeleng] Re: unknown thread
>
>
> No........ <GRIN>
>
> But I have a set of BSW taps and dies in 1/32" steps starting from 1/16"
> through to 1/4". They're not listed in any of my "standard" tables...
Though
> my 18th edition Machinery's Handbook does give 1/8" and 3/16" BSW sizes.
It
> beats me where my grandfather got them from.... Made by Totem I
think.......
>
>
> Cheers,
>
> Phill.
>
> ----- Original Message -----
> From: "alanjstepney" <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Friday, October 15, 2004 7:18 PM
> Subject: [modeleng] Re: unknown thread
>
>
> > (Use a big enough spanner and 1/4" BSF will do for any of 'em.)
> >
> > Whilst talking about unusual threads, there was a Whitworth for
microscope
> > and telescope eyepieces, and similar optical equipment. It was probably
> also
> > used on anything where a very fine thread on a large diameter tube was
> > required.
> > In that respect it is different from the Whitworth Instrument thread
which
> > is of small diameter.
> >
> > Has any one any details of this large Whitworth thread?
> > alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> >
> > www.alanstepney.info
> > Model Engineering, Steam Engine, and Railway technical pages.
> >
> >
> > ----- Original Message -----
> > From: "Tim Rickard" <the_viffer@xxxxxxxxxxx>
> > To: <modeleng@xxxxxxxxxxxxx>
> > Sent: Friday, October 15, 2004 11:53 AM
> > Subject: [modeleng] Re: unknown thread
> >
> >
> > Terry both M6 and 0BA are 6mm dia 1 mm pitch but on account of people
> hating
> > to leave well alone they are on account of the different thread form not
> > compatible.
> >
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> >
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>
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