Product Description:

The T21NRLD-LNN-NS-00 is a hybrid stepper motor produced by Pacific Scientific for the T High Torque Motors series. By energizing its two stator windings in timed sequences, the unit advances the rotor in fixed increments, giving machine builders a practical way to obtain repeatable angular positioning for light-duty actuators and feeds. In control cabinets that already host unipolar or bipolar stepper drives, the motor’s 56 mm frame size lets it replace older models without mechanical rework while still supplying the elevated static torque demanded by pick-and-place, labeling, or metering stations.

The electrical operating point centers on a per-phase current of 1.1 A DC; drive electronics that hold this current can deliver the nameplate torque without overheating the windings. A phase resistance of 4.9 ohms sets the voltage required to reach that current, and the winding inductance of 30 mH shapes the rise time of each pulse, influencing the maximum step rate. Two phases give the motor a full-step resolution of 1.8°, so 200 command pulses equal one mechanical revolution. Static torque capacity is indicated by its holding value of 1.27 N·m, while detent torque of 0.021 N·m shows the residual ripple the rotor must overcome when power is removed. With a rotor inertia of 0.000024 kg·m², acceleration profiles can be calculated accurately, and the low inertia helps limit positional overshoot during high-speed edge finding.

The housing depth is 56.1 mm, and the overall width of 56.9 mm aligns with NEMA-23 mounting patterns. The 6.35 mm shaft diameter and 20.6 mm shaft extension accommodate standard couplings, while a motor mass of 0.7 kg keeps the load on linear slides minimal. Bearing design allows a continuous axial load of 111 N and a radial load of 67 N, enabling the motor to carry moderate belt tensions or gear side loads without premature fatigue.