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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Rocker Bearing
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<blockquote data-quote="oexing" data-source="post: 177932" data-attributes="member: 1493"><p>Roger, bearings for rocking motions are not exposed to extra hard conditions just because there is rocking motion. Just they have to have the load properties in that operation. In rockers or roller followers there is not much space for a bush or needle bearing, so a caged bearing is a bad idea as you´d lose about 2/3 of the load available from a crowded type.</p><p> My modified camshafts or rockers are no serious proposition to other Vincenteers unless they like a few hours on the lathe and all, it is a lot of hassle to do, working out what you got about sizes found on these clapped out components. As to sizes for crowded needle bearings you may look up PDF files from INA so it is no secret to get sizes for inner and outer races, depending on needle diameters and numbers of needles in the bearing. </p><p> The spindles for the camshafts are homemade and case hardened to fit with the new Andrews cams. You cannot have standard spindles for the needle bearings as diameters have to be according to specs from the INA files. That means there shall not be a gap between first and last needle more than 0.10mm/ 4 thou, so they do not like to run crooked. </p><p> Too many variables in most engines, depending on wear found in components, so this is in most cases a big fitting exercise , not a reasonable job for a Spares Co. to sell sets. They would have to offer complete sets of components like camshafts, spindles and needles machined for that type of crowded bearings. </p><p> In the photo below rockers from a BMW R 69 S , overhauled to go with more and smaller needles as the standard needle set had more than 100 000km in my use - from 1972 up till now. </p><p> When you´d like to look up the sizes for crowded needle bearings, click on the Google link below, download the Schaeffler PDF at top link and scroll down to page 70 and following . There are files of sizes for shafts and outer races given for needle diameters and numbers of them.</p><p></p><p> Vic</p><p></p><p>Crowded needle bearings PDF:</p><p><a href="https://www.google.com/search?client=firefox-b-e&q=planetenlagerungen" target="_blank">Schaeffler PDF</a></p><p></p><p>[ATTACH=full]61546[/ATTACH]</p><p></p><p>[ATTACH=full]61547[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 177932, member: 1493"] Roger, bearings for rocking motions are not exposed to extra hard conditions just because there is rocking motion. Just they have to have the load properties in that operation. In rockers or roller followers there is not much space for a bush or needle bearing, so a caged bearing is a bad idea as you´d lose about 2/3 of the load available from a crowded type. My modified camshafts or rockers are no serious proposition to other Vincenteers unless they like a few hours on the lathe and all, it is a lot of hassle to do, working out what you got about sizes found on these clapped out components. As to sizes for crowded needle bearings you may look up PDF files from INA so it is no secret to get sizes for inner and outer races, depending on needle diameters and numbers of needles in the bearing. The spindles for the camshafts are homemade and case hardened to fit with the new Andrews cams. You cannot have standard spindles for the needle bearings as diameters have to be according to specs from the INA files. That means there shall not be a gap between first and last needle more than 0.10mm/ 4 thou, so they do not like to run crooked. Too many variables in most engines, depending on wear found in components, so this is in most cases a big fitting exercise , not a reasonable job for a Spares Co. to sell sets. They would have to offer complete sets of components like camshafts, spindles and needles machined for that type of crowded bearings. In the photo below rockers from a BMW R 69 S , overhauled to go with more and smaller needles as the standard needle set had more than 100 000km in my use - from 1972 up till now. When you´d like to look up the sizes for crowded needle bearings, click on the Google link below, download the Schaeffler PDF at top link and scroll down to page 70 and following . There are files of sizes for shafts and outer races given for needle diameters and numbers of them. Vic Crowded needle bearings PDF: [URL='https://www.google.com/search?client=firefox-b-e&q=planetenlagerungen']Schaeffler PDF[/URL] [ATTACH type="full"]61546[/ATTACH] [ATTACH type="full"]61547[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Rocker Bearing
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