GM7 Asynchronous Servo Motor compact design, smaller body,lighter weight, high energy density GM7 Asynchronous Servo Motor It can ... design.The feature as follow.1.compact design, smaller body,lighter weight, high energy density2.Specail design for electronics-magnet vibration ... :Class RNoiseShaft height 100-132 ≤70 dB(A)Shaft height 180 ≤76 dB(A)Shaft height 225≤77 dB(A AC Servo motor