"Rod" wrote in message
...

Many years ago I had a small Bosch circular saw which worked excellently.
Its rating (a few hundred watts) was pathetic compared to B&D and other
makes. The explanation I got (from where I cannot remember) was that all
the rest used plain journals whereas the Bosch had some form of proper
bearing. Not at all sure if that was the case but it sounded good. :-)

Obviously not true though.. if you really were losing a few hundred watts in
the bearings they would be glowing white after a few seconds.
There may be something in the motor efficiency