I couldn't resist.
"BA" should be familiar to anyone who has worked on a house. it means
"British Average" sort of like a carpenter who says "1/2 inch, that's close
enough"
Steve
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net]On
Behalf Of Loriot, George
Sent: Tuesday, May 27, 2003 8:20 AM
To: Lumia, John; dmallin@attglobal.net; 6pack
Subject: RE: Accelerator shaft bushings
Just thought I'd add my $.02. When I first saw this I thought 'british? BA?
Must be that weird size of thread called 'BA', stands for 'British
<something>', in the same class as BSW (British Standard Whitworth' and BSF
"British Standard Fine". These were the strangely sized bolts with a 55
degree thread angle, instead of 60 degree, with rounded peaks and valleys on
the threads. So even though the sizes were in inches, and the threads per
inch were in inches, the angle of the threads were just far enough off to
completely mess you up if you tried to use an american size. It would begin
to thread and then lock up when the thread angle mismatched. Applying extra
torque would strip the threads. BA was in the same 'can't use anything
else' category, for very small fasteners such as internal instrument screws
and points adjustment screws. I believe they were actually measured in
millimeters, but no standard metric screw would mate with them. These were
the things to have !
for Brit motorcycles up to the early 1970's as I recall. As I understand
it, this series of thread size was invented by the Brits for early
locomotives, in the mid 19th century. They persisted, as least for
motorcycles, for over 100 years.
And now it looks like BA in this thread was meant to mean Big A-- instead,
not 'British <something>'.
George Loriot
1976 TR6 without a single Whitworth or BA thread.
-----Original Message-----
From: Lumia, John [mailto:jlumia@ball.com]
Sent: Tuesday, May 27, 2003 10:55 AM
To: dmallin@attglobal.net; 6pack
Subject: Re: Accelerator shaft bushings
Al, Don, I believe the saying is "Big A** screwdriver". Who ever comes up
with these phrases (no please lets not start another thread similar to
churchkey)? Anyway, I was trying to suggest that a big screwdriver with
large blade would have less chance of puncturing the seal than a SA (Small
A** of
course) screwdriver. John - 1976 TR6
Date: Sat, 24 May 2003 10:11:28 -0400
From: Don Malling <>
Subject:
I'll second the bite -- what's a BA screwdriver?
Don Malling
Alan wrote:
> ok,
> I'll bite,, whats a BA screwdriver?
> Al
> ----- Original Message -----
> From: "Lumia, John" <jlumia@ball.com>
> To: <ngwehmeyer@attbi.com>; "6pack" <6pack@autox.team.net>
> Sent: Friday, May 23, 2003 10:38 AM
> Subject: Re: Accelerator shaft bushings
>
>
>
>>Neil, recently I mounted each bushing on wooden stick and heated the
>
> bushings
>
>>using a hair dryer for about a minute and that softened them up
>>nicely.
>
> Then
>
>>I used a BA screwdriver to push em in. Seems to work ok, you just
>>need to move fairly quickly. As in using any of the wifes things on
>>our cars,
>
> just
>
>>dont let her catch you doing this!
>>
>>John - 1976 TR6
>>
>>Neil wrote:>
>>So I got these neat new accelerator shaft bushings in the mail today
>>from TRF. Has anyone ever figured out how to fit these things into
>>the holes they belong in? I tried heating them in boiling water, but
>>no luck.
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