Technical Parameters General Data Manufacturer: Kollmorgen Series: AKM Servo Motor Series Model: AKM42J-AC12R-00 Motor Type: Brushless synchronous AC servo motor Frame Size: 84 mm (AKM42 platform) Rotor Stack Length: 2 Winding Type: J winding Electrical Data Rated Supply Voltage: Compatible with Kollmorgen AKD servo drives Maximum DC Bus Voltage: up to 640 VDC Commutation: Sinusoidal commutation Control Mode: Closed-loop position, speed, and torque control Performance Data (Typical AKM42J Platform) Continuous Stall Torque: ~3.5–4.0 Nm class Peak Torque: ~11–12 Nm class Rated Speed: up to 6000 rpm (depending on drive and voltage) Continuous Current: ~8.4 Arms (typical platform reference) Peak Current: ~20–22 Arms (system dependent) Mechanical Data Shaft Type: Keyed shaft Mounting: IEC standard flange (84 mm class) Connector Type: Industrial SpeedTec / IP65 rotatable connectors Brake: 24 VDC holding brake (AC12R commonly includes brake option) Cooling: Natural convection Protection Class: IP65 (connector system dependent) Rotor Inertia: ~0.000145 kg·m² (typical AKM42J range) Feedback System Encoder Type: Incremental encoder with commutation feedback (typically 2048 PPR class) Function: Speed and position feedback for closed-loop servo control Feature: Reliable industrial operation with simple commissioning Environmental Conditions Operating Temperature: 5°C to 40°C Duty Cycle: Continuous duty (S1) Installation: Industrial machine integration Resistance: Suitable for vibration and EMI industrial environments Application Areas Industrial robotics Packaging machinery Printing and converting machines Material handling systems CNC auxiliary axes General factory automation