05-08-2021, 04:23 AM
(This post was last modified: 05-08-2021, 04:30 AM by Bob Culver.)
Hi Tony
not sure why you recommend avoiding any C2 bearing which might cahnce across?
All and Sundry
Those who regularly overhaul Sevens must adopt some guidelins for wear and new tolerance. There must be a lot of serviceable used bearings about. With the oils of old wear was severe. Many Sevens crept about with severely retarded spark. Pre war Len Southward of auto musem note ran a business servicing Sevens. He told my father cars came in with the flywheels rubbing on the case!
The Companion refers to bearings of T0 tolerance. I dunno where that nomenclature comes from. Possibly same as single spot.
The Companion also suggests sorting through used bearings with a view to matching odd bits for a close clearance; such legitimate tricks are dismissed by now wealthy owners.
Incidentally for those many original shafts worn undersize it seems practical to sleeve, turn housing and fit a readily available cheap metric bearing. However turning the housing to the precise size and concentricity is not easy.
not sure why you recommend avoiding any C2 bearing which might cahnce across?
All and Sundry
Those who regularly overhaul Sevens must adopt some guidelins for wear and new tolerance. There must be a lot of serviceable used bearings about. With the oils of old wear was severe. Many Sevens crept about with severely retarded spark. Pre war Len Southward of auto musem note ran a business servicing Sevens. He told my father cars came in with the flywheels rubbing on the case!
The Companion refers to bearings of T0 tolerance. I dunno where that nomenclature comes from. Possibly same as single spot.
The Companion also suggests sorting through used bearings with a view to matching odd bits for a close clearance; such legitimate tricks are dismissed by now wealthy owners.
Incidentally for those many original shafts worn undersize it seems practical to sleeve, turn housing and fit a readily available cheap metric bearing. However turning the housing to the precise size and concentricity is not easy.