Product Description:

The T21NRLH-LNN-NS-00 is a motor produced by Pacific Scientific within the T High Torque Motors series. It is intended for industrial automation where a compact electromechanical unit must deliver precise rotary motion and elevated torque while occupying the common 2.3-inch frame envelope. By translating controlled current into mechanical output, the unit supplies motion for equipment such as small conveyors, pick-and-place axes, or metering devices that require repeatable positioning and holding capability.

The mechanical interface follows the NEMA 23 frame standard, so the housing aligns with widely available mounts and couplings. Under static excitation, each phase develops a holding torque of 180 oz-in (1.27 N-m), helping machinery maintain position against external loads. Continuous operation calls for a phase current of 2.7 A DC, and the winding resistance is 0.85 Ω. The coil set has an inductance of 4.6 mH, which influences how quickly current can be commutated by the drive electronics. During unenergized conditions, the rotor’s magnetic structure yields a detent torque of 3 oz-in (0.0212 N-m), providing a small passive resistance that aids repeatable micro-step positioning without active power.

Dynamic response is supported by a rotor inertia of 0.0034 oz-in-s² (0.0248 × 10⁻³ kg-m²), allowing rapid acceleration while minimizing overshoot in indexing applications. The motor mass is limited to 0.7 kg (1.6 lb), which helps with installation on lightweight frames or moving carriages. Internally, heat produced by copper losses travels through the stator to the case with a thermal resistance of 4.64 °C/W, which helps estimate temperature rise at specific duty cycles. One rotor stack is used, and electrical connection is made through flexible leadwires, permitting direct solder, crimp, or terminal block termination to the selected drive system.