Product Description:

The JR24M4CH servo motor from Kollmorgen is part of the ServoDisc Pancake DC Motors series. This axial air-gap, permanent-magnet DC unit is used in compact industrial automation applications that require high torque. With a diameter of 11.00 in and an overall length of 6.76 in, its flat profile allows direct mounting in machinery with limited space. Its rated mechanical output of 3188 W supports continuous motion tasks such as web handling, indexing tables, and gantry axes that require precise speed control.

The armature circuit has a resistance of 0.230 Ω, which affects the initial current draw at startup, while a separate terminal resistance of 0.310 Ω accounts for the full conductor path, including the brushes. A back-EMF constant of 43.00 V/KRPM links shaft speed to generated voltage, so operation at 3000 rpm induces approximately 129 V. The drive supply is matched to a rated terminal voltage of 138.2 V, permitting linear speed regulation throughout the rated operating range. Continuous operation is supported at 26.0 A, producing usable shaft torque while keeping heat generation manageable. The torque constant of 58.20 oz-in/A converts armature current into shaft torque. For short duty cycles, the winding can accept a peak current of 200 A, providing the torque required for rapid acceleration.

Mechanical output is based on a rated speed of 3000 rpm and a maximum speed of 5000 rpm, providing an operating range above the rated speed when permitted by the drive and connected load. At 25 °C, the motor produces 90 lb-in of continuous torque, while transient commands may reach 728 lb-in without exceeding structural limits. The rotating assembly has an inertia of 0.460 oz-in-s², allowing quick velocity changes when the motor is driven with high peak torque. The complete assembly has a mass of 50.0 lb, which must be considered when calculating loads on mounting structures and evaluating the power-to-weight ratio of mobile equipment.