In article ,
Andrew Gabriel wrote:
Larger diameter motors have lower max speeds above which the
forces on the armature will break it. Larger diameter motors
also allow space for more poles giving lower speed higher
torque characteristics. To increase torque with a given
diameter, the motor body can be made longer.

Yes - remember a pretty advanced design of 1/4" tape recorder. Had twin
capstans with direct drive. And they stopped turning when the tape stopped
running. They were pancake motors. Had a very fast start up time. That
would explain it.

--
*Kill one man and you're a murderer, kill a million youand 're a conqueror.

Dave Plowman London SW
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