The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Cases Damaged Due To Race and Bearing Modification? Not Sure...
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="oexing" data-source="post: 169559" data-attributes="member: 1493"><p>Norman did nice CAD drawings about a sleeve for the main bearings - I am hopeless with that tech. BUT if that means you have to bore the old bearing seats for maybe 65 or 66 mm from standard 63.5 mm I strongly suggest to look for other ways. The Vincent crank is very wide between mains so I would never ever risk cracked engine cases by boring oversize or drilling screws just for keeping races put. Alternatively I´d like to point you to - shock, horror, another heresy - to metric roller bearings, lipped certainly, with 62mm o.d. . Same size available with taper rollers at 62-30-20 or 16 mm basic dimensions. So then you just preess in an alu sleeve with max. 0.05mm (2thou) oversize into old bores with Loctite 648 spread with fingers on all faces and in a quick action. Certainly the sleeve is undersize i.d. for later line boring the bolted up case halves on the mill. Turning a steel sleeve for adapting the 25.4mm mm mainshaft for 30mm metric bearings is simple enough and will be loctited there as well, nothing wrong with this anyway. So then you got many options from going metric and having PA 66 GF caged roller bearings with lips on various places or two part inner races with extra lips. Forget steel or worse brass cages from olde times, modern types got higher load numbers since decades. Norton called them Superblends in the 70ties for the logarythmic roller shapes then, standard with FAG or SKF since. </p><p> In my engines I have two roller bearings on drive side with seal between them. The outer bearing is with two part inner race. I skipped the lip ring and made top hat steel adapters acting as roller bearing lip facing the rollers - plus acting as axial face for the sprocket sitting on it with high spring loads from the poor ESA design and its shock loads in operation. Standard is a ball bearing there , inner race radiused of course so this will eat into the sprocket face and all. Better do your own top hat hardened adapter. </p><p> Anyway, a very critical job with these engines, so do serious talks with your machine shop before and asking painful questions about all aspects. </p><p></p><p> Vic</p><p>[ATTACH=full]56539[/ATTACH]</p><p></p><p>[ATTACH=full]56540[/ATTACH]</p><p></p><p>[ATTACH=full]56541[/ATTACH]</p><p></p><p>[ATTACH=full]56542[/ATTACH]</p><p></p><p>[ATTACH=full]56543[/ATTACH]</p><p></p><p>[ATTACH=full]56544[/ATTACH]</p></blockquote><p></p>
[QUOTE="oexing, post: 169559, member: 1493"] Norman did nice CAD drawings about a sleeve for the main bearings - I am hopeless with that tech. BUT if that means you have to bore the old bearing seats for maybe 65 or 66 mm from standard 63.5 mm I strongly suggest to look for other ways. The Vincent crank is very wide between mains so I would never ever risk cracked engine cases by boring oversize or drilling screws just for keeping races put. Alternatively I´d like to point you to - shock, horror, another heresy - to metric roller bearings, lipped certainly, with 62mm o.d. . Same size available with taper rollers at 62-30-20 or 16 mm basic dimensions. So then you just preess in an alu sleeve with max. 0.05mm (2thou) oversize into old bores with Loctite 648 spread with fingers on all faces and in a quick action. Certainly the sleeve is undersize i.d. for later line boring the bolted up case halves on the mill. Turning a steel sleeve for adapting the 25.4mm mm mainshaft for 30mm metric bearings is simple enough and will be loctited there as well, nothing wrong with this anyway. So then you got many options from going metric and having PA 66 GF caged roller bearings with lips on various places or two part inner races with extra lips. Forget steel or worse brass cages from olde times, modern types got higher load numbers since decades. Norton called them Superblends in the 70ties for the logarythmic roller shapes then, standard with FAG or SKF since. In my engines I have two roller bearings on drive side with seal between them. The outer bearing is with two part inner race. I skipped the lip ring and made top hat steel adapters acting as roller bearing lip facing the rollers - plus acting as axial face for the sprocket sitting on it with high spring loads from the poor ESA design and its shock loads in operation. Standard is a ball bearing there , inner race radiused of course so this will eat into the sprocket face and all. Better do your own top hat hardened adapter. Anyway, a very critical job with these engines, so do serious talks with your machine shop before and asking painful questions about all aspects. Vic [ATTACH type="full"]56539[/ATTACH] [ATTACH type="full"]56540[/ATTACH] [ATTACH type="full"]56541[/ATTACH] [ATTACH type="full"]56542[/ATTACH] [ATTACH type="full"]56543[/ATTACH] [ATTACH type="full"]56544[/ATTACH] [/QUOTE]
Insert quotes…
Verification
What was Mr Irving's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Cases Damaged Due To Race and Bearing Modification? Not Sure...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top