tok-tokkie wrote: Hopefully you will regret what you posted: On
a F1 in Schools track of 20m with 30mm diam wheels the wheels
turn 212 as the car traverses the track. Typically they have 2mm
axles with a 6x2 bearing: d1 = 2mm d2=6mm ball = 0.8mm ID of
outer race = 4.8mm OD of inner race = 3.2mm Let us approximate
what happens by assuming that the balls roll without slipping on
both the inner and outer races. If the bearing is mounted in the
wheel and the axle is rigid in the body the then each rev of the
bearing outer shell will drive the balls π*4.8 = 15mm If the
wheel is rigidly mounted on the axle which turns the inner race
of the bearing which is mounted in the body the balls will be
driven π*3.2 = 10mm The balls run 50% further when the outer
race rotates. If the balls don’t slip then in the first case
each ball will have run 15 mm along the inner race taking it 1.5
revs. In the second case the balls run 10mm along the inside of
the outer race taking them just 240 degrees. xpensive
wrote:Right, let's try