Lately I have turned my attention to bearings:
1. Numbers:
6805 - ID 25 mm, used in Shimano BB and Campy cranks (their bearing is installed inside instead of at bb
6806 - ID is 30 mm used at 386, BB30 BB. Preferred thickness is 6 mm.
6000 and 6001 for front and rear hubs 10 and 12mm id
6802 ID is 15 mm and used for some higher ends hubs
2. Bearing maintenance
The casual, light maintenance is peeling off the RS (rubber seals) spraying the interior with degrease and then putting light oil and grease, then resealing
If there is looseness or movement the whole bearing is replaced. Bearings are cheap, and some goe
for P100/10 pcs. Then the expensive ones costing P400 are ceramic.
But I found out lately that the bearings can be disassembled and races separated and plastic cages
removed and cleaned thoroughly. Each bearings cleaned and then restored It takes a lot of patience
to reassemble
3. Bearing remover:
1. Usual tap tap whack on the bearing with the screw driver. But bearings are fragile
2. Bearing pusher produced by Ztto and Mozqec but only good for 25 and 30 bb only
No puller for hub bearings with id from 10 to 15mm
3. The bearing puller for these are the split bolt, used to pull blind bearings for motorcycle
4. Bearing press fit
Essentially a threaded rod with drifts from both side. Can be good for all sizes of bearing
Vise, or light tap using old bearing can achieve same purpose
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