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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin gears.
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<blockquote data-quote="A_HRD" data-source="post: 24948" data-attributes="member: 49"><p>Trev,</p><p></p><p>I have a full set of Holder-manufactured gears which I bought about 5 years ago and still have sitting on the shelf in their original wrapping and box. </p><p></p><p>I have just spent a frustrating morning setting-up those gears on the rotary table and making various measurements with a dti. (Wish I had the space-age computerised measuring system that Trev has). Anyhow, I can confirm that the G7 and G10 have dogs that are 5 to 20 thou misplaced; only some dogs touch the teeth in the corresponding gears G8/1 and G9; most don't. I can see I'll be spending some time with my Dremel trying to get a happier outcome. I have an old original G10 and those dogs are fine. </p><p></p><p>I'm happy to report that the dogs in the new double-gear are all within 2 thou or so. </p><p></p><p>I can't comment on the fit to a layshaft as I don't have one - new or old. If someone can take one to the Herts and Beds Rally this weekend we can have a trial fitting session! </p><p></p><p>So what preliminary findings can we deduce so far (still subject to confirmation of course)? </p><p>1. I can confirm Trev's findings, regarding the dogs, with unused G7/G10 gears bought from Holder 5 years ago. </p><p>2. The original Vincent drawings would appear to be right in respect of the G7/G10 dogs, but Mr Holder's machinery/machinist may not up to the tolerances required. </p><p>3. About a year ago it appears the Vincent supplier(s) were still getting their gears from Mr Holder; made with his (original?) drawings on his machinery. </p><p>Time we got the VOC's superior drawings into the hands of a specialist gear manufacturer for a trial run methinks! </p><p></p><p>Perhaps Dick Wheeldon could comment? </p><p></p><p>Peter B</p><p>Bristol, UK.</p></blockquote><p></p>
[QUOTE="A_HRD, post: 24948, member: 49"] Trev, I have a full set of Holder-manufactured gears which I bought about 5 years ago and still have sitting on the shelf in their original wrapping and box. I have just spent a frustrating morning setting-up those gears on the rotary table and making various measurements with a dti. (Wish I had the space-age computerised measuring system that Trev has). Anyhow, I can confirm that the G7 and G10 have dogs that are 5 to 20 thou misplaced; only some dogs touch the teeth in the corresponding gears G8/1 and G9; most don't. I can see I'll be spending some time with my Dremel trying to get a happier outcome. I have an old original G10 and those dogs are fine. I'm happy to report that the dogs in the new double-gear are all within 2 thou or so. I can't comment on the fit to a layshaft as I don't have one - new or old. If someone can take one to the Herts and Beds Rally this weekend we can have a trial fitting session! So what preliminary findings can we deduce so far (still subject to confirmation of course)? 1. I can confirm Trev's findings, regarding the dogs, with unused G7/G10 gears bought from Holder 5 years ago. 2. The original Vincent drawings would appear to be right in respect of the G7/G10 dogs, but Mr Holder's machinery/machinist may not up to the tolerances required. 3. About a year ago it appears the Vincent supplier(s) were still getting their gears from Mr Holder; made with his (original?) drawings on his machinery. Time we got the VOC's superior drawings into the hands of a specialist gear manufacturer for a trial run methinks! Perhaps Dick Wheeldon could comment? Peter B Bristol, UK. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin gears.
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