Quote:
Originally Posted by _paralyzed_
the newer motors have better quality magnets so the "notchy" feeling is greater.
Also the 4274 is a 4-pole motor, where as the kb45 and 4465 are 2-pole motors. A 4-pole will be twice as "notchy" as a 2-pole.
The "notchy" feeling is just magnetism as the rotor turns........
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Yes...........All of this......+
The 4 pole motors have iron laminations in the field that the copper winding go around, much like the outrunner motor core that is shown in my avatar.
2 pole motors on the other hand, have only copper in their field winding. Their field winding are wound, compressed and baked, after being bathed in epoxy. This makes this type of field winding retain it's shape.