Would anyone have for sale, or know of, a good vertical shaft top bevel gear, with no wear on the shaft surface (where it runs in the bronze bush). This is the only part I now need to complete a painstaking 3 year restoration of a 1938 CS1, I'm trying to get it ready for the big Norton event at Donnington in August. Your price paid, or I may haveother mechanical parts you are looking for to trade.
Alternatively, does anyone know of a company that can surface grind small components - my existing bevel gear shaft area has worn to a slight taper, making a good fit in a new bush impossible. Both Stu Rogers and myself are scratching our heads on how to get round this problem
Thanksin anticipation,
Roger.
Hi Ian Thank you for that.…
Hi Ian
Thank you for that. I have had some parts from Paul Norman, but he is not listing bevel gears at the moment. Mcintosh Motorcycles in New Zealand are listing pairs of gear pinions at 500+ dollars, with a later type gear tooth,andstating the gears'can be modified to suit early models'.
Assuming pinion teeth are good, the general opinion seems to be to have the gear shaft ground back to a parallel, it usually only involves a thou or two, not enough to affect the hardening, then a new bush can be made to suit.Stu Rogers used to have a good man who did the grinding, but not any more.
Charlie Smith recommended a company in Coventry called Universal Grinding 'The best in the country', who were incredibly helpful & chatty, real 'old school',and familiar with this work.The pinion has now gone to them. I also hadacontact, via Chris on this site,from a gentleman called Arne in Sweden who can do this work. Will let you all know how I get on,if it works out I will post contact numbers & details for anyone else who has a similar problem.
Roger
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Just had the bevel gear ba…
Just had the bevel gear back from Stu with a new bush to suit. Universal Grinding did a superb job on restoring the gear shaft, bringing it back to parallel, with a new surface under the gear head. A check on their machine showed the grind in parallel and round profiles was to within a couple of microns, good enough for a 75 year old engine!
Cost of grinding was around £30.00. A much better solution than that equally (or worse) worn gear on ebay for £100 or more.
Universal Grinding tel No. is 02476 368431, ask for Barry.
Just the top end to finish now, and then engine back into the frame.
Picture of rolling chassis attached for anyone interested.
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Sorry, no picture - still…
Sorry, no picture - still to large an attachment for this site - have tried to get round the problem before, but no luck.
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The attachment size limit…
The attachment size limit has been extended in size tenfold from 100Kb to 1Mb. This allows for a ca. 1000 x 667 pixel image at 72 dpi which is all that is required for screen resolution.
The 1Mb limit is a compromise between sufficient quality to see image detail and web page loading times.
There are many examples of free graphics editing utilities available to download from the web and most computer default graphics display packages have a built-in resizing option.
Webmaster
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Thanks Chris - have just r…
Thanks Chris - have just re-sized this picture and will try again . .
Should now be attached - 1938 CS1 rolling chassis.
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Top Bevel Gear jpg
As is often the case when trying to look at a jpg file on this site al I get is a page full of garbage. See attachment. Please explain
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The jpg files have been…
The jpg files have been named wrongly or the site has corrupted them, they should end .jpg not -jpg. If you download and rename them then you get a very small thumbnail image so no point in that. So best if Roger renames them and reloads them up and hopefully the site will not change them.
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