Well, that was an example,,, I was using extremes as I have never seen
roller balls in bearings as large as I described when the inner race is 1/2"
in diameter... ;~) Race thickness would also dictate ball diameters
also...


"Edwin Pawlowski" wrote in message
. com...

"Leon" wrote in message

AAhhhttt... Ball bearing balls and needle bearing needles don't circle
the
bearing at a 1 to 1 ratio. The larger those balls are, the fewer times
thay will turn around the inner race.
So, regardless of the bearing size, the inner race that the arbor is
supported by will always be the same size and turn the same speed given
the
arbor is the same size and turns the same speed. The larger the outside
race of the bearing the larger the balls will be and the slower thay
will
turn.

Thanks, I did not consider that.
Ed