M.1015.6961 Kollmorgen
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The Kollmorgen M.1015.6961 is a servo motor from the NSM Brushless Servo Motors series. It provides a continuous torque of 2.5 Nm, peak torque of 7.1 Nm, and a maximum speed of 3600 RPM. The motor has a body length of 200 mm, a shaft diameter of 16 mm, and weighs 5.9 kg.
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Product Description:
The M.1015.6961 is a brushless servo motor manufactured by Kollmorgen for the NSM Brushless Servo Motors series. Designed for closed-loop motion, the unit interfaces with digital drives to deliver precise shaft rotation in automated assembly lines, packaging stations, and semiconductor handlers. By combining a permanent-magnet rotor with encoder feedback, it converts electrical control commands into mechanical output while avoiding brush wear and the associated maintenance requirements.
Its continuous torque rating is 2.5 Nm, allowing the shaft to supply that torque continuously when the motor is properly cooled. For short acceleration periods, the motor delivers a peak torque of 7.1 Nm, providing additional force to overcome static friction or sudden load increases. The torque constant of 0.28 Nm/A links commanded current to developed torque, while the back-EMF coefficient of 34 V/kRPM helps determine suitable drive voltage. A maximum operating speed of 3600 rpm establishes the upper permissible shaft speed for the bearings and rotor assembly. The shaft has a diameter of 16 mm, extends 25 mm, and includes a 4.8 × 4.8 mm keyway for keyed couplings. The front flange has a 102 mm mounting bolt circle that supports accurate alignment with compatible IEC gearheads. Position data is provided by a 5000-line incremental encoder, giving the connected drive detailed feedback for speed and position control. A phase resistance of 0.77 Ω affects continuous current requirements and winding heat generation during operation.
The housing has a length of 200 mm and a mass of 5.9 kg, providing a compact thermal sink for cabinet-mounted or robot-arm installations. Dynamic behavior is shaped by a rotor inertia of 0.00035 kg·m², which balances fast acceleration with velocity stability on moderately loaded axes. Electrical response is influenced by a winding inductance of 2.9 mH; this value limits current ripple at the drive’s pulse-width modulation switching frequency and helps maintain smooth servo performance during high-bandwidth position control. The permanent-magnet design supports efficient torque production without brushes, while the incremental encoder supplies the feedback required for accurate closed-loop regulation.
