Opportunities like that won't come up very often, so probably worth the effort (and expense). Interesting explanation of the input shaft issue, if they were more commonly available it might have been worth experimenting to find a better solution.
Which problem, the circlip, or the shaft length? The wire clip can be replaced with a rectangular section type and I'll mount a ball race in the flywheel to replace the needle roller in the crank. The Citroen DS clutch shaft should solve the length issue. There is a 'special application' extra long shaft available, but that would actually be too long (although it could be machined shorter) and would have cost more.
@@EVguru It was both actually but I misunderstood the circlip issue, thinking a square section had worn very badly. The ball race did cross my mind but not knowing the engine and how much meat you had to play with, is an angular contact bearing of any benefit? Shame about the corrosion. It's easy to end up down a rabbit hole with projects like this but It's a very interesting one that I'm looking forward to watching the progress of. Thank you.
The earlier Lotus clutch shaft had a square shoulder at the spline, which meant the circlip wasn't a problem, but was changed to the taper (like the DS) when the Turbo came along with greatly increased torque. The existing input shaft has had the spigot extended to reach the pilot bearing in the crank. Putting a ball race in the flywheel will mean not having to extend the new shaft. Although people will endlessly tell you that ball races are not designed for thrust loads, their rated thrust capacity is still 20-25% of their radial rating, which is way more that enough in this application.
@@EVguru Hope I'm not monopolizing your time with chat. Radius'd Change of section makes perfect sense. Having spent donkeys years working with vertical synchronous motors utilizing 6000 series bearings in the marine environment, I agree, they were more likely to suffer from Brinelling in longer periods of inactivity due to background vibration than axial loads. Thanks.
Opportunities like that won't come up very often, so probably worth the effort (and expense). Interesting explanation of the input shaft issue, if they were more commonly available it might have been worth experimenting to find a better solution.
Which problem, the circlip, or the shaft length? The wire clip can be replaced with a rectangular section type and I'll mount a ball race in the flywheel to replace the needle roller in the crank. The Citroen DS clutch shaft should solve the length issue. There is a 'special application' extra long shaft available, but that would actually be too long (although it could be machined shorter) and would have cost more.
@@EVguru It was both actually but I misunderstood the circlip issue, thinking a square section had worn very badly. The ball race did cross my mind but not knowing the engine and how much meat you had to play with, is an angular contact bearing of any benefit? Shame about the corrosion.
It's easy to end up down a rabbit hole with projects like this but It's a very interesting one that I'm looking forward to watching the progress of. Thank you.
The earlier Lotus clutch shaft had a square shoulder at the spline, which meant the circlip wasn't a problem, but was changed to the taper (like the DS) when the Turbo came along with greatly increased torque. The existing input shaft has had the spigot extended to reach the pilot bearing in the crank. Putting a ball race in the flywheel will mean not having to extend the new shaft. Although people will endlessly tell you that ball races are not designed for thrust loads, their rated thrust capacity is still 20-25% of their radial rating, which is way more that enough in this application.
@@EVguru Hope I'm not monopolizing your time with chat.
Radius'd Change of section makes perfect sense.
Having spent donkeys years working with vertical synchronous motors utilizing 6000 series bearings in the marine environment, I agree, they were more likely to suffer from Brinelling in longer periods of inactivity due to background vibration than axial loads. Thanks.