On Thu, 17 Sep 2015 18:40:18 -0700
"Lew Hodgett" wrote:

Bearings are selected based on cost, not necessarily engineering
parameters.

The higher the volume, the lower the cost. There are more basic
203 ball bearings manufactured that ALL the rest of the ball bearings
combined.

As a result, it is the lowest cost bearing made and often gets applied
in an over engineered applications where a smaller bearing could
be used but it would cost more.

seems a contradiction
using a lowest cost bearing could mean that the product is in fact not
over-engineered and might turn out to be under-engineered


and for a festool it might not be unreasonable to expect a quality bearing