Chas. & Paul
And yes, it is a bloody nuisance!!
I run cars from the 60's, 70's, 80's,and 2000's So I have to have Whitworth, AF, and Metric for the cars as well as BSF, BA, AF and Metric for the cycles. I've got soooo many spanners (wrenches) and sockets, I can't move for the damn things. Each car has it's own toolkit in the boot (trunk) and I have to move my travelling mixed tool kit from bike to bike, when you have a mix of British and Continental componets on each as I do.
If only life was simple as per France or Italy...or anywhere except Britian!!
Paul, I don't know if you were meaning me when you referred to 'Derek' in your email, but I MAY be able to find some Chater sized chainring bolts if you're desperate? Please ask offlist.
Regards Derek Athey Honiton, Devon UK
On Thu, May 20, 2010 at 8:08 PM, verktyg <verktyg@aol.com> wrote:
> 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/
>
> 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
>>
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