Two sterilizable drives are for use with or without planetary gearheads in high speed medical applications of up to 90,000 rpm. The drives by Maxon Motor USA, Fall River, MA, are characterized by high nominal speed, low-noise and low-vibration operation, marginal thermal emission, compact design, and sterilizability of typically 500 autoclave cycles. The drives are identical and possess equal performance data and characteristics. The motor and gearhead of Size 5 version possess dimensions in U.S. Customary Units resulting in an outside diameter of ½ inch and a 0.125-in. diam. shaft. The motor has a “Servo Mount”, a well-established type of motor fixation. The EC13/GP13 version is expressed in metrics, which results in an OD of 13 mm, a 3-mm-diam. shaft, and a flange with three face side threads. Both are available either equipped with Hall sensors or sensorless as well as with three different windings. The gearheads come with versions of one, two or three stages as well as with or without output end shaft sealing.