Re: [Healeys] Speedo Drive Thread Size?

[john harper via Healeys <healeys@autox.team.net>]

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Harold

I can confirm that in my documents there is a section British Standard
Cycle thread. Diameters are from 1/8" to 3/4", the largest. TPI is from 40
thru 26. It is a 60-degree form rounded on top and inside.

It first became a recognized standard in 1902

Best regards

On Sun, 8 Aug 2021 at 18:45, Henry G Leach via Healeys <
healeys@autox.team.net> wrote:

> Harold-you can get these parts at: https://britishfasteners.com/
>
> They have all the British sizes and tools to boot including BSC!  Hank
>
> -----------------------------------------
> From: "Harold Manifold via Healeys"
> To: "Ken Fleming via Healeys"
> Cc:
> Sent: Sunday August 8 2021 9:27:29AM
> Subject: [Healeys] Speedo Drive Thread Size?
>
> Just when I thought I had a handle Whitworth, BSPP, BSPT, SAE, UNF, etc.
> along comes BSC (British Standard Cycle). The threads on the transmission
> speedo drive and the angle drive are not the best and could use a
> refreshed. The pitch is 26 TPI and the diameter is =C2=BE=E2=80=9D as bes=
t I can
> measure. After searching Google the closest match I could find is 3/4" X =
26
> TPI BSC.
>
>
>
> I have never heard of British Standard Cycle before. Can anyone confirm i=
f
> this is the tread size?
>
>
>
> Harold
>
>
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<div dir=3D"ltr">Harold<div><br></div><div>I can confirm that in my documen=
ts there is a section British Standard Cycle thread. Diameters are from 1/8=
&quot; to 3/4&quot;, the largest. TPI is from 40 thru 26. It is a 60-degree=
 form rounded on top and inside.</div><div><br></div><div>It first became a=
 recognized standard in 1902</div><div><br></div><div>Best regards</div></d=
iv><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On =
Sun, 8 Aug 2021 at 18:45, Henry G Leach via Healeys &lt;<a href=3D"mailto:h=
ealeys@autox.team.net">healeys@autox.team.net</a>&gt; wrote:<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex"><div>Harold-you can get these =
parts at:=C2=A0<a href=3D"https://britishfasteners.com/"; target=3D"_blank">=
https://britishfasteners.com/</a><div><br></div><div>They have all the Brit=
ish sizes and tools to boot including BSC!=C2=A0 Hank<br><br><div></div><p>=
-----------------------------------------</p>From: &quot;Harold Manifold vi=
a Healeys&quot; <u></u><br>To: &quot;Ken Fleming via Healeys&quot;<br>Cc: <=
br>Sent: Sunday August 8 2021 9:27:29AM<br>Subject: [Healeys] Speedo Drive =
Thread Size?<br><br>
<div>
<p class=3D"MsoNormal">Just when I thought I had a handle Whitworth,
BSPP, BSPT, SAE, UNF, etc. along comes BSC (British Standard
Cycle). The threads on the transmission speedo drive and the angle
drive are not the best and could use a refreshed. The pitch is 26
TPI and the diameter is =C2=BE=E2=80=9D as best I can measure. After search=
ing
Google the closest match I could find is 3/4&quot; X 26 TPI BSC.</p>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal">I have never heard of British Standard Cycle
before. Can anyone confirm if this is the tread size?</p>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal">Harold</p>
<p class=3D"MsoNormal">=C2=A0</p>
</div>
<u></u></div></div>
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