Rotator

n.	1.	(Anat.) that which gives a rotary or rolling motion, as a muscle which partially rotates or turns some part on its axis.
	2.	(Metal.) A revolving reverberatory furnace.

carousel, centrifuge, chuck, disk, drill, extractor, fan, governor, gyroscope, impeller, jack, merry-go-round, propeller, reel, roller, rolling pin, rolling stone, rotary drill, rotor, roundabout, rundle, screw, spindle, spinner, spit, spool, teetotum, top, treadmill, turbine, turntable, wheel, whirlabout, whirler, whirligig, whorl, windmill