Whitworth bolt needed

Quoted message said:

Where can I get one? What are the thread dimensions?

Find the local British motorcycle shop.
Phil Brown

Lim said:

Hi,

I need a new seatpost clamp bolt for my 1970's Raleigh Team 753. The seapost
clamp uses a Whitworth threaded bolt, correct? No common bicycle related
bolt I have fits.

Where can I get one? What are the thread dimensions?

As an old British sports car nut I though, "This should be easy". It
isn't.

I tried a google search for "whitworth fasteners" and came up with a
number of hits, none of which panned out. Finally tried the UK Google
and found:

http://stigfasteners.bizland.com/BSFtoBSW.chtml

If you're really desperate give them a try. It might be a pain dealing
across the pond but at least they list a range of BSW fasteners.

jeverett3<AT>earthlink<DOT>net http://home.earthlink.net/~jeverett3

Quoted message said:

As an old British sports car nut I though, "This should be easy". It
isn't.

I tried a google search for "whitworth fasteners" and came up with a
number of hits, none of which panned out. Finally tried the UK Google
and found:

http://stigfasteners.bizland.com/BSFtoBSW.chtml

If you're really desperate give them a try. It might be a pain dealing
across the pond but at least they list a range of BSW fasteners.

Too complicated. I had a Raleigh Pro with a missing Whitworth Allen bolt . The
local Brit motorcycle shop-Casey's in Pacoima-had a whole box of misc. bolts.
The one I needed was a very common bolt used to hold primary cases togeather on
Triumphs, BSAs and other Brit bikes.
phil Brown

Lim said:

Hi,

I need a new seatpost clamp bolt for my 1970's Raleigh Team 753. The seapost
clamp uses a Whitworth threaded bolt, correct? No common bicycle related
bolt I have fits.

Where can I get one? What are the thread dimensions?

Is that the one with a allen bolt which threads into the
seatlug itself? We have those in a Whitworth 55 degree
thread 24G, diameter 7.8mm = 0.306 inches which drive with
an SAE 9/32" allen key. Is that it?

Many riders had the frame threads cut to 8mm metric. Not a
bad idea.

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

Lim said:

Hi,

I need a new seatpost clamp bolt for my 1970's Raleigh Team 753. The seapost
clamp uses a Whitworth threaded bolt, correct? No common bicycle related
bolt I have fits.

I got a piece of 1/4" Whitworth threaded rod from a fastenings supplier
last year. Whitworth is still used for some applications, camera tripod
fixings in that particular size.

Incidentally, it was the first standard thread - fixings before
Whitworth were made so that nuts would only fit onto bolts supplied at
the same time. If memory serves the thread angle is 60 deg.

Quoted message said:

I got a piece of 1/4" Whitworth threaded rod from a fastenings supplier
last year. Whitworth is still used for some applications, camera tripod
fixings in that particular size.

My tripods are 1/4-20.
Phil Brown

Quoted message said:

Lim said:

I need a new seatpost clamp bolt for my 1970's Raleigh Team 753. The
seapost
clamp uses a Whitworth threaded bolt, correct? No common bicycle related
bolt I have fits.

Zog The Undeniable said:

I got a piece of 1/4" Whitworth threaded rod from a fastenings supplier
last year. Whitworth is still used for some applications, camera tripod
fixings in that particular size.
Incidentally, it was the first standard thread - fixings before
Whitworth were made so that nuts would only fit onto bolts supplied at
the same time. If memory serves the thread angle is 60 deg.

You make a good point , Whitworth is an historically
significant standard.
55 degrees and curved (not pointy) at the root

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

An anonymous Yahoovian said:

Quoted message said:

I need a new seatpost clamp bolt for my 1970's Raleigh Team 753. The
seapost
clamp uses a Whitworth threaded bolt, correct? No common bicycle related
bolt I have fits.

A fellow Yahoovian using the alias 'Zog the Undeniable said:

I got a piece of 1/4" Whitworth threaded rod from a fastenings supplier
last year.

If memory serves, the Yahoovian who goes by "Zog" is U.K. based, and it
wouldn't surprise me if such a thing were to be available in That
Sceptred Isle.

However, I also surmise that the O.P. is _not_ from the U.K. (if he or
she was, it's unlikely that the dififculty would have arisen.)

Quoted message said:

Whitworth is still used for some applications,

This might be true, for all I know.

Quoted message said:

camera tripod fixings in that particular size.

That's not correct. Camera tripods use S.A.E. threads. In the U.S.,
they use the ubiquitous 1/4-20 size. In much of Europe they use the
3/16-20 size.

Quoted message said:

Incidentally, it was the first standard thread - fixings before
Whitworth were made so that nuts would only fit onto bolts supplied at
the same time.

That's correct. See the Whitworth entry in my Bicycle Glossary for more
on Sir Joseph Whitworth, one of the great tech guys of the 19th century.

Quoted message said:

If memory serves the thread angle is 60 deg.

Nope, 55 degrees. S.A.E. and standard Metric are 60 degrees.

Italian bicycle threading is also 55 degrees, being a sort of hybrid
between Whitworth and metric (Metric diameters, Whitworth thread pitch
and angle.)

Sheldon "Not To Be Confused Witn Isambard Kingdom Brunel" Brown
+-----------------------------------------------+
| I'll be appearing as Preposteros in |
| Gilbert & Sullivan's Thespis at M.I.T. |
| April 9-10,15-17 http://web.mit.edu/gsp/www |
| http://sheldonbrown.com/music.html |
+-----------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

In article <[email hidden]>,

DRS said:

Sheldon Brown <[email hidden]> wrote in message
[email hidden]

Quoted message said:

Benjamin Weiner said:

British motorcycles?

Is there still a British motorcycle industry?

http://www.triumph.co.uk/site/intro.cfm

I knew someone would post that.

Note that those bikes use all metric fasteners. There probably isn't an
SAE bolt in the whole line, and there definitely isn't a BSW bolt.

That said, the British motorcycle (and presumably car) restoration
industry soldiers on, and besides antiques there is probably still a few
misbegotten 50-year-old remnants of the British industrial heyday in
sufficiently regular use that BSW bits are still available:

http://attiwill-industrial.straightsell.net/BSW%2BGrade%2B304/Productlist
..phtml

And then there's the still-in-production Enfield Bullet, which, if I'm
interpreting this correctly, may use metric, SAE, and BSW bolts:

http://www.cybersteering.com/cruise/feature/bullet/maint2.html

--
Ryan Cousineau, [email hidden] http://www.sfu.ca/~rcousine/wiredcola/
President, Fabrizio Mazzoleni Fan Club

Try Maryland Metrics. http://mdmetric.com/ Also, I believe Whitworth is 55°
vs 60° used for Metric and US english hardware, but that's neither here nor
there.

"Zog The Undeniable" <[email hidden]> wrote in message
news:4079a04a.0@entanet...

Quoted message said:

Lim said:

Hi,

I need a new seatpost clamp bolt for my 1970's Raleigh Team 753. The

seapost

Quoted message said:

Quoted message said:

clamp uses a Whitworth threaded bolt, correct? No common bicycle related
bolt I have fits.

I got a piece of 1/4" Whitworth threaded rod from a fastenings supplier
last year. Whitworth is still used for some applications, camera tripod
fixings in that particular size.

Incidentally, it was the first standard thread - fixings before
Whitworth were made so that nuts would only fit onto bolts supplied at
the same time. If memory serves the thread angle is 60 deg.