JR33M6CH Kollmorgen
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The Kollmorgen JR33M6CH is part of the ServoDisc Pancake DC Motors series and offers a rated power output of 10,550 W with a rated speed of 3000 RPM. This motor features a continuous stall torque of 254 lb-in, peak torque of 4000 lb-in, and rated continuous current of 47.6 Amps. It has an overall diameter of 16.25 inches and a length of 7.00 inches.
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Product Description:
The JR33M6CH direct-current machine is manufactured by Kollmorgen as part of the ServoDisc Pancake DC Motors series. This frameless disc-armature motor combines a large diameter with minimal stack height, allowing high torque generation in limited axial space. Within an automation cell, it can drive rotary tables, gimbals, or compact gearheads where smooth continuous rotation or rapid indexing is required. Its flat construction also minimizes cogging, allowing position loops in CNC equipment and robotics to provide finer resolution at low speeds.
It operates at a rated terminal voltage of 246.0 V, a level that balances power density with insulation limits. At that voltage, the armature draws a rated continuous current of 47.6 A, establishing the copper loss baseline for thermal sizing of the power electronics. The internal copper path has a resistance of only 0.190 Ω, so the steady-state voltage drop remains small. Electromechanical conversion is represented by a torque constant of 108.25 oz-in/A, meaning each ampere contributes approximately 0.76 N·m. The back electromotive force constant is 80.00 V/krpm; this linear relationship allows a speed controller to calculate the generated voltage and provide appropriate drive headroom during regenerative operation.
When operated within these electrical limits, the rotor reaches a rated speed of 3000 rpm and delivers its rated power without exceeding bearing or commutator limits. The magnetic circuit can support up to 4000 lb-in of peak torque for short periods, allowing the motor to handle transient load spikes. Dynamic behavior is influenced by a moment of inertia of 3.300 oz-in-s², enabling fast acceleration while maintaining stability in closed-loop motion tasks. For applications requiring higher throughput, the motor can operate at a maximum recommended speed of 5000 rpm, provided that thermal rise and brush wear remain within acceptable limits. The broad operating range supports demanding motion profiles that combine rapid indexing, controlled acceleration, and smooth rotation without requiring a long conventional motor housing.
