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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Clearance between DS case and bearing sleeve?
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<blockquote data-quote="greg brillus" data-source="post: 108439" data-attributes="member: 597"><p>I would say the sleeve should be a good interference fit in the crank case housing, but not necessarily the bearings themselves given you are putting a steel bearing into a steel sleeve. Even one thou interference will cause the bearing to broach it's way in.......On post war cases we sleeve the housings with steel sleeves with about 0.003" interference, but the actual bore of the sleeve gives about not more than 3 tenths of a thou for the bearings themselves...........Others might prove me wrong, but we have done many engines like this with no failures so far..........remember too that the large diameter Thackery spring washer for the outer ball race is to allow for movement of the outer bearing and the expanding cases once the engine heats up in service.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 108439, member: 597"] I would say the sleeve should be a good interference fit in the crank case housing, but not necessarily the bearings themselves given you are putting a steel bearing into a steel sleeve. Even one thou interference will cause the bearing to broach it's way in.......On post war cases we sleeve the housings with steel sleeves with about 0.003" interference, but the actual bore of the sleeve gives about not more than 3 tenths of a thou for the bearings themselves...........Others might prove me wrong, but we have done many engines like this with no failures so far..........remember too that the large diameter Thackery spring washer for the outer ball race is to allow for movement of the outer bearing and the expanding cases once the engine heats up in service. [/QUOTE]
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Tech. Advice: Series 'A' 500cc/1000cc Bikes
Clearance between DS case and bearing sleeve?
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