The Mitsubishi HG-KR43-K(B) is a rotary servo motor from the HG-KR series, designed for precise motion control in industrial automation — think pick-and-place, indexing tables, spindle orientation, or any axis where you need tight speed and position regulation. Rated speed sits at 3000 r/min, with a maximum speed of 6000 r/min, so it covers the common 3000 rpm base for most servo applications and leaves headroom for high-speed moves when the load allows.
What the speed ratings mean for fit
The 3000 r/min rated speed is the continuous-duty operating point where the motor delivers its full rated torque without overheating. The 6000 r/min maximum is a short-duration ceiling — you can overspeed for brief moves, but the torque drops off above rated speed (constant-power region).