Gerhard Fiedler wrote:
> 0 torque at the shaft at max. speed (when all the power is used
> to overcome internal friction and other losses)?

Only indirectly.  Even if the motor was ideal and had no friction and zero
loss, you would still have 0 torque at the unloaded shaft speed.  The
unloaded shaft speed is the limit where the voltage applied to the motor is
cancelled by the back EMF of the motor acting like a generator.  In reality
that back EMF is a little less than the applied voltage, with the remainder
times the current going to the various power losses such as friction and
winding resistance.


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