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front wheel bearings Atlas/commando #75648
07/04/08 3:57 pm
07/04/08 3:57 pm
Joined: Apr 2007
Posts: 518
Southeast Usa
B
Bigtwin Online content OP
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Bigtwin  Online Content OP
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Joined: Apr 2007
Posts: 518
Southeast Usa
Hi! I have acquired a Norton Front hub with a double leading shoe front brake, but no wheel bearings or axle are present. Does anyone have a bearing number ( or dimensions for interchange) that might be available at a local (US) bearing supplier? Otherwise a suggested source mail order? Since I am out in the sticks, my local tractor shop has been really good at cross referencing odd bearings/bushings. Any info/ideas appreciated!!!

Thanks!

Bigtwin

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Re: front wheel bearings Atlas/commando #75650
07/04/08 4:26 pm
07/04/08 4:26 pm
Joined: Oct 2007
Posts: 234
Ohio
Ron Leisner Offline
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Ron Leisner  Offline
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Joined: Oct 2007
Posts: 234
Ohio
Bearing numbers are
6203 17 X 40 X 12 Single Row Deep groove Ball
4203 17 X 40 X 16 Double Row Deep Groove Ball
The single row is easily found in sealed, but not the double row. There is a slightly wider sealed double row that requires the bearing spacer to be machined first.


Ron L
1973 MkV 750 Roadster
1974 850 Interstate
1975 850 Cafe Racer
1968 750 Fastback
1967 P11
1969 Ranger 750
Re: front wheel bearings Atlas/commando #75651
07/04/08 5:52 pm
07/04/08 5:52 pm
Joined: Apr 2007
Posts: 518
Southeast Usa
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Bigtwin Online content OP
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Bigtwin  Online Content OP
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Joined: Apr 2007
Posts: 518
Southeast Usa
Hi & thanks for the info!
I do not have the internal spacer either, so I may have to make both an axle & internal piece. I like the idea of going to the wider shielded bearing.

Thanks again!!!

Bigtwin

Re: front wheel bearings Atlas/commando #75652
07/06/08 12:32 am
07/06/08 12:32 am
Joined: Oct 2003
Posts: 11,138
North Georgia, USA
RF Whatley Offline
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RF Whatley  Offline
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Joined: Oct 2003
Posts: 11,138
North Georgia, USA
BT -
I have fitted the wider bearing by trimming the spacer myself. Just so you fully understand, the wider bearing is simply wider, not any stronger. The only advantage is in availability.

You'll want to spec all your wheel bearings as "double sealed" NOT "shielded". There's a big difference between the 2.

The 3 bearings in the rear wheel are in an inch size (if I remember correctly), but can still be had "sealed".

bigt


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes

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