06-02-2019, 10:42 PM
(This post was last modified: 06-02-2019, 10:49 PM by Bob Kneale.)
I too have been interested in this since Charles P raised it as a side issue in a post (Odd Noise) about a year ago. I've sourced the ball race he mentioned as well as a pair of 1 1/8" roller races for the front bearing. My interest is to try to lengthen the life expectancy of that much maligned 3 bearing crank, which must suffer unnecessarily from bending loads when the clutch pedal is depressed. Bearing in mind that the centre webs are only 0.3" thick, is it surprising that so many failures occur in that area?
Having suffered the total destruction (at 20 mph) of the bottom end of a 2 bearing engine I'm keen to try a 2 bearing conversion as well.
The roller races are available from Bearing Services Norwich Ltd who showed interest when I explained what I was planning to do.
MRJ1.1/8C3
Cylindrical Roller Bearing, rollers attached to inner ring full floating outer ring (1.1/8x2.13/16x13/16) (BSA Goldstar crankshaft drive side 1950-1953, OEM 65-1388
Manufactured for us by NKE Bearings Austria
Hope this is helpful and causes others to other interested parties!
Cheers
Bob
Having suffered the total destruction (at 20 mph) of the bottom end of a 2 bearing engine I'm keen to try a 2 bearing conversion as well.
The roller races are available from Bearing Services Norwich Ltd who showed interest when I explained what I was planning to do.
MRJ1.1/8C3
Cylindrical Roller Bearing, rollers attached to inner ring full floating outer ring (1.1/8x2.13/16x13/16) (BSA Goldstar crankshaft drive side 1950-1953, OEM 65-1388
Manufactured for us by NKE Bearings Austria
Hope this is helpful and causes others to other interested parties!
Cheers
Bob