Gents - The COVID lockdown
this week has got me started on reassembling the A10 after many idle months
. The Driveside Roller Bearing in my 1960 Flash is unfamiliar, and I am considering whether to replace it for a known brand. It has markings OE and 2n06 and nothing else but is to NF206 specs. I got this bearing in the 1990s and cannot remember where from, but likely C&D or D/Fly. It has an unsymmetrical metal cage like in the attached NSK image. Is my bearing familiar to any Forum members? I have no idea what Clearance it is but the ānā may mean Normal or CN. I had to work the Inner a bit to get it to slide in, so I guess that the Clearance is probably CN or C2. It has only 12 rollers of 7.5mm width, whereas the ones Muskrat referred to (Reply #4) from Bearing Revolutions is for an NF206 with C3 clearance, and has at least 15 rollers if the image is for that bearing. I suspect that 12 rollers is enough for a standard Flash.
The photo before it was removed from the crank by the machinist before crank balancing shows that I had it the wrong way around, but much easier to get something behind it for removal. If I were to reinstall it correctly, the large diameter side of the cage is almost touching the flywheel, with very little space to get anything behind it or behind the rollers. Unlike Zanders problem the Inner can go either way into the Outer with no offset between the surfaces of the inner and outer. I wonder whether the cage shape acts as an oil slinger favoring the largest side?
The motor has only 80 miles on it, so I am not overly concerned about patterning wear on the bearing. The Inner is a tight fit on the crank. It would not push on cold but slid on OK after sitting in boiling water and off again (quickly). The crank condition is good. If I reinstall it, I am thinking I would put it back in the way it came out. ie the inner reversed for removal tool access.
I am wondering whether to reinstall it or to lash out for a well-known brand with guaranteed C3 Clearance? Problem is cost
ā I would like to buy three ā One to Install, One to grind the inner for a loose fit for shim setting, and a third for a spare to make sure it is availability for a future rebuild. Opinions most welcome.!!