Lotus Elan

SAE to Brit thread danger?

PostPost by: mikecauser » Tue Sep 12, 2006 10:36 pm

On Tue, 12 Sep 2006 17:57:27 -0400 "Tebbutt, Bill" <***@***.***> wrote:

Suppliers like Aircraft Spruce are brilliant at AN orders both on the phone
and online. They even have a variety of assembled AN kits for the hobbyist
- I bought one from them several years ago for the formula atlantic
restoration, and its been a godsend.

Bill,

I have an Aircraft Spruce catalog, it took about 6 weeks for it to get
through the mail to me. I have not only the width of a continent but
also the width of the North Atlantic, and the bureaucracy of "my"
Customs & Excise department to deal with when ordering from them. Love
reading the catalog, but for practical purposes I need a supplier nearer
home.

However, it does help me understand the desire of USAians to have local
suppliers for their Lotus bits.


Mike
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PostPost by: elansprint71 » Tue Sep 12, 2006 10:40 pm

Mike,
No!

Enough, already.

What was the Oxford def for standard.....? ;-)

Pete.

Mike Causer wrote:

On Tue, 12 Sep 2006 22:12:19 +0100 Pete Taylor
<***@***.*** <mailto:elansprint71%40btopenworld.com>>
wrote:

> Rob, there is no relationship between these two "standards", as you
> would expect in the UK!

Well, while I've got Machinery's Handbook off the shelf, are you
going to explain why American National, Unified, Unified Miniature,
American Standard Microscope, American Standard Acme, American Standard
Stub Acme, American Standard Buttress, S.A.E. Spark Plug, American
National Standard Hose, American National Standard Fire-Hose, American
Standard Taper Pipe, American Standard Straight Pipe are all so
different from each other?

The answer is that they all do different jobs, frequently in different
materials, and generally at different stresses or sizes. It's nothing
to do with the country that specified them, it's about the job they are
intended to do.

Mike
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PostPost by: kayenney » Wed Sep 13, 2006 1:55 am

Machinery's Handbook - mine is the 1945 Edition. I win!

Ken
NW Florida
'69 +2, etc.

Mike Causer <***@***.***> wrote:
On Tue, 12 Sep 2006 16:43:27 -0400 "Robert D. LaMoreaux" <***@***.***> wrote:

How does BA relate to Whitworth?

Not at all. Whitworth is 55degree and inch measurements, BA is
47.5degree and metric. Size nomenclature is based on shank dia for
Whitworth, and on an arbitrary scale for BA. However both have rounded
roots & crests, which is a Good Thing.

So while they may not have been specified as AN aircraft bolts by that
standard, today the closest thing available are AN bolts.

Not where I live. If /you/ live where you can get surplus AN stuff then
great, but most of the Lotus-owning world cannot. In theory those
doughnut bolts are very badly loaded, but in practice they seem to
survive well and last a long time. Can't say the same 'bout the
doughnuts ;-(

Side note: After buying ALL of Carroll Smith's books, the next thing a
Lotus owner should look for (esp in s/hand bookshops) is Machinery's
Handbook. The copy in my deskside bookshelf is the 1959 edition, but
there's a HUGE amount of information in there. About the only thing the
1959 copy doesn't help me with is developments in metals since then.
Oh, and it's all in inches, but that's OK, I've had many years practice
at converting.

Mike
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Flood the fen again! - Wicken Fen enlargement - http://www.wicken.org.uk





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PostPost by: "Roger Sieling" » Wed Sep 13, 2006 2:32 am

Mike, I am totally amazed. I went back to Newnes Manual and did find a 47.5 degree thread form. I'd always thought it was 55 like Whitworth. I think I have 3 Machinery Handbook from over the years getting updates. I also have Lionel Marks book too, a couple of different issues and one quite old. The old one stays in my Gerstner Oak machinist cabinet, next to my lathe.

Roger

>> ***@***.*** >>>
Machinery's Handbook - mine is the 1945 Edition. I win!


Ken
NW Florida
'69 +2, etc.

Mike Causer <***@***.***> wrote:
On Tue, 12 Sep 2006 16:43:27 -0400 "Robert D. LaMoreaux" <***@***.***> wrote:

How does BA relate to Whitworth?

Not at all. Whitworth is 55degree and inch measurements, BA is
47.5degree and metric. Size nomenclature is based on shank dia for
Whitworth, and on an arbitrary scale for BA. However both have rounded
roots & crests, which is a Good Thing.

So while they may not have been specified as AN aircraft bolts by that
standard, today the closest thing available are AN bolts.

Not where I live. If /you/ live where you can get surplus AN stuff then
great, but most of the Lotus-owning world cannot. In theory those
doughnut bolts are very badly loaded, but in practice they seem to
survive well and last a long time. Can't say the same 'bout the
doughnuts ;-(

Side note: After buying ALL of Carroll Smith's books, the next thing a
Lotus owner should look for (esp in s/hand bookshops) is Machinery's
Handbook. The copy in my deskside bookshelf is the 1959 edition, but
there's a HUGE amount of information in there. About the only thing the
1959 copy doesn't help me with is developments in metals since then.
Oh, and it's all in inches, but that's OK, I've had many years practice
at converting.

Mike
--
Mike Causer Email - mailto:***@***.***
GPG KeyID 1C2DDA07 WWW - http://www.mikecauser.com
Flood the fen again! - Wicken Fen enlargement - http://www.wicken.org.uk





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"Roger Sieling"
 

PostPost by: s2lola » Wed Sep 13, 2006 1:02 pm

Roger,

From this thread, I can only conclude that you are, in fact, "easily amazed"
:)


Cheers,
BT

-----Original Message-----
From: ***@***.***lto:***@***.*** Behalf
Of Roger Sieling
Sent: 2006/09/12 22:30
To: ***@***.***; ***@***.***
Subject: Re: [LotusElan.net] SAE to Brit thread danger?


Mike, I am totally amazed. I went back to Newnes Manual and did find a 47.5
degree thread form. I'd always thought it was 55 like Whitworth. I think I
have 3 Machinery Handbook from over the years getting updates. I also have
Lionel Marks book too, a couple of different issues and one quite old. The
old one stays in my Gerstner Oak machinist cabinet, next to my lathe.

Roger

>> ***@***.*** >>>
Machinery's Handbook - mine is the 1945 Edition. I win!


Ken
NW Florida
'69 +2, etc.

Mike Causer <***@***.***> wrote:
On Tue, 12 Sep 2006 16:43:27 -0400 "Robert D. LaMoreaux"
<***@***.***> wrote:

How does BA relate to Whitworth?

Not at all. Whitworth is 55degree and inch measurements, BA is 47.5degree
and metric. Size nomenclature is based on shank dia for Whitworth, and on an
arbitrary scale for BA. However both have rounded roots & crests, which is a
Good Thing.

So while they may not have been specified as AN aircraft bolts by that
standard, today the closest thing available are AN bolts.

Not where I live. If /you/ live where you can get surplus AN stuff then
great, but most of the Lotus-owning world cannot. In theory those doughnut
bolts are very badly loaded, but in practice they seem to survive well and
last a long time. Can't say the same 'bout the doughnuts ;-(

Side note: After buying ALL of Carroll Smith's books, the next thing a Lotus
owner should look for (esp in s/hand bookshops) is Machinery's Handbook. The
copy in my deskside bookshelf is the 1959 edition, but there's a HUGE amount
of information in there. About the only thing the 1959 copy doesn't help me
with is developments in metals since then. Oh, and it's all in inches, but
that's OK, I've had many years practice at converting.

Mike
--
Mike Causer Email - mailto:***@***.***
GPG KeyID 1C2DDA07 WWW - http://www.mikecauser.com
Flood the fen again! - Wicken Fen enlargement - http://www.wicken.org.uk





---------------------------------
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