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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
brakes
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<blockquote data-quote="Martyn Goodwin" data-source="post: 84731" data-attributes="member: 2433"><p>Hi Greg,</p><p></p><p>I have metric bearings front n rear on my Comet and use NILOS seals. The standard NILOS seal for a 30204 is perfect for the rear axle but NOT for the front. There is no available NILOS seal that will work at the front without modification.</p><p></p><p>For the front you need a NILOS seal for a 30303 bearing but you will find the centre hole at 17mm is too small to go over the axle. You need to enlarge the central hole in the seal but it MUST remain central, and not off centre. The solution I came up with was to hold the seal GENTLY in a (borrowed) lathe running at the slowest speed possible then use a Dremel or die grinder with a small stone and use that to slowely enlarge the central hole till its a snug fit over the axle.</p><p></p><p>Worked a treat for me. Remember to fill the back of the NILOS seal with grease - to catch and hold any fine metal particles that are created over the first few hours of running as the NILOS creates its sealing groove on the face of the fixed bearing cone.</p><p></p><p>Lot of good info nn NILOS can be found here <a href="http://www.skf.com/binary/30-228382/950-710-Nilos_08.pdf" target="_blank">http://www.skf.com/binary/30-228382/950-710-Nilos_08.pdf</a> </p><p></p><p>Martyn</p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 84731, member: 2433"] Hi Greg, I have metric bearings front n rear on my Comet and use NILOS seals. The standard NILOS seal for a 30204 is perfect for the rear axle but NOT for the front. There is no available NILOS seal that will work at the front without modification. For the front you need a NILOS seal for a 30303 bearing but you will find the centre hole at 17mm is too small to go over the axle. You need to enlarge the central hole in the seal but it MUST remain central, and not off centre. The solution I came up with was to hold the seal GENTLY in a (borrowed) lathe running at the slowest speed possible then use a Dremel or die grinder with a small stone and use that to slowely enlarge the central hole till its a snug fit over the axle. Worked a treat for me. Remember to fill the back of the NILOS seal with grease - to catch and hold any fine metal particles that are created over the first few hours of running as the NILOS creates its sealing groove on the face of the fixed bearing cone. Lot of good info nn NILOS can be found here [URL]http://www.skf.com/binary/30-228382/950-710-Nilos_08.pdf[/URL] Martyn [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
brakes
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