Product Description:

The T21NRHJ-LNN-NS-00 stepper motor is produced by Pacific Scientific within the T High Torque Motors series. It translates discrete drive pulses into incremental shaft rotation, supplying open-loop positioning for packaging lines, pick-and-place stations, and indexing tables in general industrial automation. The motor is built to deliver elevated torque from a compact NEMA-23 frame, enabling controlled motion to fit into tight mechanical envelopes without adding encoders or gearboxes.

The winding set is rated at 4.1 A DC per phase, and with two phases energized the copper network presents 0.33 ohms of resistance; these values set the power supply requirements and driver current limit. A coil inductance of 1.8 mH shapes the rate at which current can change, influencing how fast the motor can follow high-speed command streams without losing synchronism. At stall, the rotor can hold load torques up to 1.27 N-m, allowing stable positioning against external forces, while the detent torque of 0.021 N-m represents the passive cogging that must be overcome before energization. The electrical set integrates with micro-stepping drives that use the 2-phase architecture to interpolate finer resolution between full steps.

Mechanically, the shaft can withstand an axial load of 111 N and a radial load of 67 N, supporting belt tensions or thrust collars without premature bearing wear. A rotor inertia of 0.000024 kg·m² gives the axis low rotational momentum, so the drive can accelerate or decelerate quickly when short move profiles are required. Each command advances the rotor by 1.8°, establishing 200 full steps per revolution for straightforward pulse-to-angle calculations. The motor package measures 56.1 mm long by 56.9 mm wide, weighs 0.7 kg, and carries a 6.35 mm diameter shaft that extends 20.6 mm beyond the front face, dimensions that simplify coupling to pulleys or flexible couplers in compact machinery.