[CR] Any reports about LeHigh ?Trexlertown Swap or Brooklyn Swap?

(Example: Events)

References: <COL114-W56267533982476C1238B3AE4E30@phx.gbl> <4BF5889D.6070806@aol.com>
To: Classicrendezvous@bikelist.org
Date: Thu, 20 May 2010 19:07:18 -0400
In-Reply-To: <4BF5889D.6070806@aol.com>
From: <oroboyz@aol.com>
Subject: [CR] Any reports about LeHigh ?Trexlertown Swap or Brooklyn Swap?


Subject line says it all...

Anyone? Bueller? Ferris Bueller?

Dale Brown Greensboro, North Carolina USA

-----Original Message----- From: verktyg <verktyg@aol.com> To: castell5@sympatico.ca; Classicrendezvous@bikelist.org Sent: Thu, May 20, 2010 3:08 pm Subject: Re: [CR] Now: A good pitch/ thread count gauge(s). Was: Pitch and thread count C-L bolts

Metric & Multistandard Component Corp. has been a good source for non US standard fasteners and tools for many years. Be aware, their prices listed online are list prices so actual costs may be less.

http://www.metricmcc.com/

Here's a link to their metric and British thread pitch gauges:

http://www.metricmcc.com/priceCatalog/6-611.htm

Many good quality 60° Unified Thread Pitch Gauges will have a 25 TPI blade. These may or may not work well on a 55° British thread because the bottom of these threads are rounded and some pitch gauges have sharp 60° V teeth.

The British systems of threads and fasteners was intentionally designed over the years to be different than any other national standard as a protectionist measure. Customers who bought mechanical goods made in the UK had to get replacement parts from the "Mother country".

For example, 17/64" is 0.2656" which is 0.0156 larger than 1/4" (0.250"). It's also 6.74624mm.

British hand tool nomenclature was unique too. Whitworth spanners (wrenches) are the diameter of the threaded fastener. For example a 1/2" Whitworth spanner fits a 1/2" bolt. Other systems use the distance measured across the flats on the hex head nut or bolt.

Chas. Colerich Oakland, CA USA

Dr. Paul B. Williams wrote:
> Morning folks,
> > The discussion about the peculiarities of Whitworth 17/64" X 25 chainring bolts/screws for Chater Lea chainsets got me thinking about the need to find a good gauge or set of gauges to determine such things. Any suggestions?
> > BTW I lost out on the bidding for the bolts on EBay - guess I am now going to have to turn to my mate Derek. Just out of interest does anyone know of a supplier of Whitworth dies - a quick Google search showed that a 17/64 X 25 die can be obtained (borrowed?) from the London Douglas Motorcycle Club! Maybe worth a membership???
> > Boy do I miss having Sheldon around!
> > Paul Williams,
> Ottawa, ON, Canada