Product Description:

The JR16M4CHLR-2 is a permanent-magnet DC motor manufactured by Kollmorgen for the ServoDisc Pancake DC Motors series. Its flat, frameless construction suits automation stages that need high torque in minimal axial space, letting machine builders mount the rotor directly to load elements such as indexing tables or compact gearheads. When driven by a low-voltage power stage, the motor supplies continuous rotary motion for precise speed and position control in industrial equipment.

The motor delivers a continuous shaft torque of 25 lb-in at 25 °C while drawing a rated 46.6 A. Its back-EMF constant is 7.00 V/KRPM; every 1000 r/min therefore produces seven volts at the terminals, giving the controller an easy speed reference. With a torque constant of 9.47 oz-in/A, current translates predictably into output torque. The disc armature measures 7.38 in in diameter, yet the total length is only 4.50 in, allowing the motor to fit in shallow enclosures. Momentary overloads are tolerated because the winding can accept up to 350 A, developing the specified peak torque of 207 lb-in. Under nominal conditions, the electrical-to-mechanical conversion produces 887 W at the rated speed of 3000 RPM. A terminal voltage of 23.0 V and an armature resistance of 0.050 Ω set the continuous operating point while keeping copper losses predictable.

At 40 °C, the permissible continuous output falls to 22 lb-in, maintaining a safe winding temperature without auxiliary cooling. The commutator design supports a maximum recommended speed of 5000 RPM, providing headroom for dynamic excursions above the 3000 RPM nominal point. A rotor inertia of 0.084 oz-in-sec² enables quick acceleration and deceleration, which is beneficial for indexing or pick-and-place motions. Installation adds limited mass because the assembled motor weighs only 17.5 lb, easing integration on moving carriages or articulated robotic joints.