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YouTube / Vimeo Watch
Flywheel alignment
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<blockquote data-quote="Cyborg" data-source="post: 112258" data-attributes="member: 3426"><p>Yikes.... didn’t need the dial gauge to see the runout. Just watch the flywheel as he turns it. I wouldn’t trust my lathe to do that without verifying/grinding the centres on the crank, then toss my clapped out 3 jaw and use a 4 jaw or collet to hold a live centre. The other problem I would have is when I align the lathe centres like that (centre to centre), by the time they are far enough apart to fit the crank in, they are no longer anywhere near closely aligned enough for crank work, due to the wear etc in the lathe bed. I could adjust that out, but wonder if he did. I was slightly stunned by the amount he got the flywheel to move with that little love tap. When I did the Comet with a new pin, the crank was mounted in a holder on the bench. Then I stood on the bench and used something similar to a golf swing. I made up some bars with small roller bearings to hold the crank while measuring runout. Would have preferred knife edge rollers, but don’t plan on making a career out of it. His pin is lose enough that I wonder if he can get the cases back together without the flywheels moving.</p><p>Full disclosure..I am certainly no expert on this subject.</p><p>Cue the knife edge roller versus lathe centre debate.</p><p>I’ll abstain, because I think both work if done properly. #Switzerland</p><p></p><p>Here is a more manly way of doing the beating part. [MEDIA=youtube]lHoNQ81GBE8[/MEDIA]</p></blockquote><p></p>
[QUOTE="Cyborg, post: 112258, member: 3426"] Yikes.... didn’t need the dial gauge to see the runout. Just watch the flywheel as he turns it. I wouldn’t trust my lathe to do that without verifying/grinding the centres on the crank, then toss my clapped out 3 jaw and use a 4 jaw or collet to hold a live centre. The other problem I would have is when I align the lathe centres like that (centre to centre), by the time they are far enough apart to fit the crank in, they are no longer anywhere near closely aligned enough for crank work, due to the wear etc in the lathe bed. I could adjust that out, but wonder if he did. I was slightly stunned by the amount he got the flywheel to move with that little love tap. When I did the Comet with a new pin, the crank was mounted in a holder on the bench. Then I stood on the bench and used something similar to a golf swing. I made up some bars with small roller bearings to hold the crank while measuring runout. Would have preferred knife edge rollers, but don’t plan on making a career out of it. His pin is lose enough that I wonder if he can get the cases back together without the flywheels moving. Full disclosure..I am certainly no expert on this subject. Cue the knife edge roller versus lathe centre debate. I’ll abstain, because I think both work if done properly. #Switzerland Here is a more manly way of doing the beating part. [MEDIA=youtube]lHoNQ81GBE8[/MEDIA] [/QUOTE]
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YouTube / Vimeo Watch
Flywheel alignment
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