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Bob,If you had one available, how would you go about checking the thread an=
gle?=C2=A0Gary Hodson
-----Original Message-----
From: Bob Haskell via Healeys <healeys@autox.team.net>
To: Harold Manifold <manifold@telus.net>; john harper <ah100tech@gmail.com>=
; Hank Leach <gradea1@charter.net>
Cc: healeys@autox.team.net <healeys@autox.team.net>
Sent: Sun, Aug 8, 2021 7:14 pm
Subject: Re: [Healeys] Speedo Drive Thread Size?
Harold,
As has been pointed out in separate emails, there are two standards that=20
include 3/4" dia with 26 TPI. British Standard Cycle with thread angle=20
of 60 degrees and British Standard Brass with a thread angle of 55=20
degrees.=C2=A0 Since the speedo drive is brass I would suspect the latter,=
=20
but I don't have one handy to check.
Cheers,
Bob Haskell
Austin Healey 3000 BN7/BT7 registrar
On 8/8/21 7:33 PM, Harold Manifold via Healeys wrote:
>
> Thanks for all your replies. I will add BSC to my fastener list. I=20
> will see if I can locate a die.
>
> Harold
>
> *Sent: *Sunday, August 8, 2021 12:33 PM
> *Subject: *Re: [Healeys] Speedo Drive Thread Size?
>
> Harold
>
> I can confirm that in my documents there is a section British Standard=20
> Cycle thread. Diameters are from 1/8" to 3/4", the largest. TPI is=20
> 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=20
>
>=C2=A0 =C2=A0 Harold-you can get these parts at: https://britishfasteners.=
com/
>=C2=A0 =C2=A0 <https://britishfasteners.com/>
>
>=C2=A0 =C2=A0 They have all the British sizes and tools to boot including =
BSC!=C2=A0 Hank
>
>=C2=A0 =C2=A0 -----------------------------------------
>
>=C2=A0 =C2=A0 From: "Harold Manifold via Healeys"
>=C2=A0 =C2=A0 To: "Ken Fleming via Healeys"
>=C2=A0 =C2=A0 Cc:
>=C2=A0 =C2=A0 Sent: Sunday August 8 2021 9:27:29AM
>=C2=A0 =C2=A0 Subject: [Healeys] Speedo Drive Thread Size?
>
>=C2=A0 =C2=A0 Just when I thought I had a handle Whitworth, BSPP, BSPT, SA=
E,
>=C2=A0 =C2=A0 UNF, etc. along comes BSC (British Standard Cycle). The thre=
ads on
>=C2=A0 =C2=A0 the transmission speedo drive and the angle drive are not th=
e best
>=C2=A0 =C2=A0 and could use a refreshed. The pitch is 26 TPI and the diame=
ter is
>=C2=A0 =C2=A0 =C2=BE=E2=80=9D as best I can measure. After searching Googl=
e the closest match
>=C2=A0 =C2=A0 I could find is 3/4" X 26 TPI BSC.
>
>=C2=A0 =C2=A0 I have never heard of British Standard Cycle before. Can any=
one
>=C2=A0 =C2=A0 confirm if this is the tread size?
>
>=C2=A0 =C2=A0 Harold
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html=20
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------=_Part_518858_1259271303.1628519227677
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<div style=3D"color:black;font: 12pt Comic Sans MS, sans-serif;">Bob,
<div>If you had one available, how would you go about checking the thread a=
ngle? </div>
<div>Gary Hodson</div>
<div><br>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font=
size=3D"2">-----Original Message-----<br>
From: Bob Haskell via Healeys <healeys@autox.team.net><br>
To: Harold Manifold <manifold@telus.net>; john harper <ah100tech@g=
mail.com>; Hank Leach <gradea1@charter.net><br>
Cc: healeys@autox.team.net <healeys@autox.team.net><br>
Sent: Sun, Aug 8, 2021 7:14 pm<br>
Subject: Re: [Healeys] Speedo Drive Thread Size?<br>
<br>
<div dir=3D"ltr">Harold,<br clear=3D"none"><br clear=3D"none">As has been p=
ointed out in separate emails, there are two standards that <br clear=3D"no=
ne">include 3/4" dia with 26 TPI. British Standard Cycle with thread angle =
<br clear=3D"none">of 60 degrees and British Standard Brass with a thread a=
ngle of 55 <br clear=3D"none">degrees. Since the speedo drive is bras=
s I would suspect the latter, <br clear=3D"none">but I don't have one handy=
to check.<br clear=3D"none"><br clear=3D"none">Cheers,<br clear=3D"none"><=
br clear=3D"none">Bob Haskell<br clear=3D"none">Austin Healey 3000 BN7/BT7 =
registrar<br clear=3D"none"><br clear=3D"none">On 8/8/21 7:33 PM, Harold Ma=
nifold via Healeys wrote:<br clear=3D"none">><br clear=3D"none">> Tha=
nks for all your replies. I will add BSC to my fastener list. I <br clear=
=3D"none">> will see if I can locate a die.<br clear=3D"none">><br cl=
ear=3D"none">> Harold<br clear=3D"none">><br clear=3D"none">> *Fro=
m: *john harper <mailto:<a shape=3D"rect" ymailto=3D"mailto:ah100tech@gm=
ail.com" href=3D"mailto:ah100tech@gmail.com";>ah100tech@gmail.com</a>><br=
clear=3D"none">> *Sent: *Sunday, August 8, 2021 12:33 PM<br clear=3D"no=
ne">> *To: *Hank Leach <mailto:<a shape=3D"rect" ymailto=3D"mailto:gr=
adea1@charter.net" href=3D"mailto:gradea1@charter.net";>gradea1@charter.net<=
/a>><br clear=3D"none">> *Cc: *Harold Manifold <mailto:<a shape=3D=
"rect" ymailto=3D"mailto:manifold@telus.net"; href=3D"mailto:manifold@telus.=
net">manifold@telus.net</a>>; <br clear=3D"none">> <a shape=3D"rect" =
ymailto=3D"mailto:healeys@autox.team.net"; href=3D"mailto:healeys@autox.team=
.net">healeys@autox.team.net</a> <mailto:<a shape=3D"rect" ymailto=3D"ma=
ilto:healeys@autox.team.net" href=3D"mailto:healeys@autox.team.net";>healeys=
@autox.team.net</a>><br clear=3D"none">> *Subject: *Re: [Healeys] Spe=
edo Drive Thread Size?<br clear=3D"none">><br clear=3D"none">> Harold=
<br clear=3D"none">><br clear=3D"none">> I can confirm that in my doc=
uments there is a section British Standard <br clear=3D"none">> Cycle th=
read. Diameters are from 1/8" to 3/4", the largest. TPI is <br clear=3D"non=
e">> from 40 thru 26. It is a 60-degree form rounded on top and inside.<=
br clear=3D"none">><br clear=3D"none">> It first became a recognized =
standard in 1902<br clear=3D"none">><br clear=3D"none">> Best regards=
<br clear=3D"none">><br clear=3D"none">> On Sun, 8 Aug 2021 at 18:45,=
Henry G Leach via Healeys <br clear=3D"none">> <<a shape=3D"rect" ym=
ailto=3D"mailto:healeys@autox.team.net"; href=3D"mailto:healeys@autox.team.n=
et">healeys@autox.team.net</a> <mailto:<a shape=3D"rect" ymailto=3D"mail=
to:healeys@autox.team.net" href=3D"mailto:healeys@autox.team.net";>healeys@a=
utox.team.net</a>>> wrote:<br clear=3D"none">><br clear=3D"none">&=
gt; Harold-you can get these parts at: <a shape=3D"rect" href=
=3D"https://britishfasteners.com/"; target=3D"_blank">https://britishfastene=
rs.com/</a><br clear=3D"none">> <<a shape=3D"rect" href=
=3D"https://britishfasteners.com/"; target=3D"_blank">https://britishfastene=
rs.com/</a>><br clear=3D"none">><br clear=3D"none">> =
They have all the British sizes and tools to boot including BSC! Han=
k<br clear=3D"none">><br clear=3D"none">> -------------=
----------------------------<br clear=3D"none">><br clear=3D"none">>&=
nbsp; From: "Harold Manifold via Healeys"<br clear=3D"none">>&nb=
sp; To: "Ken Fleming via Healeys"<br clear=3D"none">> &nbs=
p; Cc:<br clear=3D"none">> Sent: Sunday August 8 2021 9:2=
7:29AM<br clear=3D"none">> Subject: [Healeys] Speedo Drive=
Thread Size?<br clear=3D"none">><br clear=3D"none">> J=
ust when I thought I had a handle Whitworth, BSPP, BSPT, SAE,<br clear=3D"n=
one">> UNF, etc. along comes BSC (British Standard Cycle).=
The threads on<br clear=3D"none">> the transmission speed=
o drive and the angle drive are not the best<br clear=3D"none">> &=
nbsp; and could use a refreshed. The pitch is 26 TPI and the diameter is<b=
r clear=3D"none">> =C2=BE=E2=80=9D as best I can measure. =
After searching Google the closest match<br clear=3D"none">>  =
; I could find is 3/4" X 26 TPI BSC.<br clear=3D"none">><br clear=3D"no=
ne">> I have never heard of British Standard Cycle before.=
Can anyone<br clear=3D"none">> confirm if this is the tre=
ad size?<br clear=3D"none">><br clear=3D"none">> Harold=
<br clear=3D"none">><br clear=3D"none">> ____________________________=
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