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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Drive Sprocket Loose
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<blockquote data-quote="oexing" data-source="post: 91318" data-attributes="member: 1493"><p>I knew that this is a critical place requiring a good fit for avoiding wear and any troubles that go with it. So a few months ago I did a LOT of laser welding at my former company on most of the splines in the Rap gearboxes - doing two of them parallel. The welding for the sprocket fit should take just max. half an hour for a lowly toolmaker. But then you have to set up a mill plus dividing head for producing a precise push fit there, takes some time to do this right. But nevertheless I believe this to be essential in the long run. So when you get all parts for your box do check that all is well, don´t take compromises, do it right. The hard weld from laser welding can be milled with a modern coated carb end mill for 60 HRC, face milling, I did it by grinding on a HF spindle on the mill, nice and slow.</p><p> I could have had new spares from the Spares Co. but honestly I don´t have much confidence in getting that sort of fit I´d like to see - for that money.</p><p></p><p> Vic</p><p></p><p>[ATTACH=full]19741[/ATTACH]</p><p></p><p>[ATTACH=full]19742[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 91318, member: 1493"] I knew that this is a critical place requiring a good fit for avoiding wear and any troubles that go with it. So a few months ago I did a LOT of laser welding at my former company on most of the splines in the Rap gearboxes - doing two of them parallel. The welding for the sprocket fit should take just max. half an hour for a lowly toolmaker. But then you have to set up a mill plus dividing head for producing a precise push fit there, takes some time to do this right. But nevertheless I believe this to be essential in the long run. So when you get all parts for your box do check that all is well, don´t take compromises, do it right. The hard weld from laser welding can be milled with a modern coated carb end mill for 60 HRC, face milling, I did it by grinding on a HF spindle on the mill, nice and slow. I could have had new spares from the Spares Co. but honestly I don´t have much confidence in getting that sort of fit I´d like to see - for that money. Vic [ATTACH=full]19741[/ATTACH] [ATTACH=full]19742[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Burman Drive Sprocket Loose
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