[Healeys] Speedo Drive Thread Size?

[warthodson at aol.com]

Bob,If you had one available, how would you go about checking the thread angle? Gary Hodson
-----Original Message-----
From: Bob Haskell via Healeys <healeys at autox.team.net>
To: Harold Manifold <manifold at telus.net>; john harper <ah100tech at gmail.com>; Hank Leach <gradea1 at charter.net>
Cc: healeys at autox.team.net <healeys at 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 
include 3/4" dia with 26 TPI. British Standard Cycle with thread angle 
of 60 degrees and British Standard Brass with a thread angle of 55 
degrees.  Since the speedo drive is brass I would suspect the latter, 
but I don't have one handy to check.

Cheers,

Bob Haskell
Austin Healey 3000 BN7/BT7 registrar


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