25-02-2022, 04:26 PM
(This post was last modified: 25-02-2022, 04:34 PM by Bob Culver.)
I presume the outer edge of the bearing housing was referred to. It is abot 4X the radiius of the ball track and the bearing tilts to more than twice the pure axial clearance, so about .007 which is not so great. But pure radial is what matters. The Seven set up is reasonably fool proof whereas taper roller, a.c , ball races fitted like rollers etc are not
Compared with other cars the bearings are very large, esp when modern uprated ratings are considered, and failing is not a problem Design was empirical and some post war cars driven much harder than previous were short lived on ball bearings; early Minor Javelin etc,. I had a colleague who lived at a radio station on a winding road miles out of town, where his girlfriend lived. He went thru front tyres and bearings on his MM at a great rate.
Taper bearings force the grease out and should be periodically repacked whereas ball races recycle it and with modern non drying greases need no attention, as moderns.
On Javelin cars the outtr bearing is locatd in the hub, not the inner. Held by a screwed ring which suffers even more from amateur attention than the typical Seven hub, most of which have been prised apart by owners without a puller.
Compared with other cars the bearings are very large, esp when modern uprated ratings are considered, and failing is not a problem Design was empirical and some post war cars driven much harder than previous were short lived on ball bearings; early Minor Javelin etc,. I had a colleague who lived at a radio station on a winding road miles out of town, where his girlfriend lived. He went thru front tyres and bearings on his MM at a great rate.
Taper bearings force the grease out and should be periodically repacked whereas ball races recycle it and with modern non drying greases need no attention, as moderns.
On Javelin cars the outtr bearing is locatd in the hub, not the inner. Held by a screwed ring which suffers even more from amateur attention than the typical Seven hub, most of which have been prised apart by owners without a puller.