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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ET77 Main bearing distance piece
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<blockquote data-quote="riptragle1953" data-source="post: 36786" data-attributes="member: 2328"><p>You will become tired of my saying this but a bearing, especially a thin outer race main, is as only as accurate as the bore into which it is fitted. When any bearing race has been found to have come loose this also means you are</p><p>dealing with an oversize, unround, tapered bearing bore. Anything you do that doesn't reclaim the bore to perfection is creating an oversize (radial clearance), unround, tapered bearing. Gee, the bearing companies go to immense</p><p>trouble to create a perfect bearing ..... they are more than willing to provide fitting specifications, and everyone comes up with some plan other then doing it right. </p><p>Just because a machine runs does not make it right. I repaired a Comet once that ran well.... but the inner main was seized in the race and the shaft was powering the machine by spinning in the inner race bore!</p><p>Keep in mind as well that the outer race with a .0001 dial indicator on the inside can be squeezed several thousands out of round with your fingers.</p></blockquote><p></p>
[QUOTE="riptragle1953, post: 36786, member: 2328"] You will become tired of my saying this but a bearing, especially a thin outer race main, is as only as accurate as the bore into which it is fitted. When any bearing race has been found to have come loose this also means you are dealing with an oversize, unround, tapered bearing bore. Anything you do that doesn't reclaim the bore to perfection is creating an oversize (radial clearance), unround, tapered bearing. Gee, the bearing companies go to immense trouble to create a perfect bearing ..... they are more than willing to provide fitting specifications, and everyone comes up with some plan other then doing it right. Just because a machine runs does not make it right. I repaired a Comet once that ran well.... but the inner main was seized in the race and the shaft was powering the machine by spinning in the inner race bore! Keep in mind as well that the outer race with a .0001 dial indicator on the inside can be squeezed several thousands out of round with your fingers. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ET77 Main bearing distance piece
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