[Bud]

I posted this on another thread not long ago:
"Just to add a side note: the "grooves" in the original rollers, though they may conduct lubricant across the bearing, are not grooves at all. I ran across this in an old New Departure catalog. The rollers are made of wound strip stock. They are deliberately designed that way. They are shock absorbing rollers! When hit with a heavy shock they avoid high contact stress by expanding axially. Replacement bearings are usually solid rollers with much less shock absorbing capability, but cheaper to produce."
I would say the original manufacturer for Ford was Hyatt, not Timken.