Product Description:

The T22NRHK-LNN-NS-00 is a two-phase stepper motor produced by Pacific Scientific as part of the T High Torque Motors series. With its 1.8° step geometry, this motor offers discrete positioning that is useful for pick-and-place heads, index tables, and other automation axes that rely on open-loop control. By translating pulse commands into proportional angular movement, it serves as a compact actuator wherever servo feedback is unnecessary but repeatable torque is required.

The motor fits the NEMA 23 frame envelope and draws a phase current of 6.6 A DC. A phase inductance of 0.85 mH limits di/dt during micro-stepping, while a DC resistance of 0.2 Ω establishes the copper loss baseline. Nominal holding torque is rated at 1.98 N-m, allowing fixtures to remain stationary when energized. Each full step advances the shaft by 1.8°, so 200 pulses complete one revolution. Rotor inertia of 0.0000395 kg·m² sets the acceleration profile that must be supplied by the drive. The stator features two windings wired for bipolar drive methods, matching the unit’s two-phase designation. Detent torque of 0.042 N-m provides a small mechanical latch that improves positional stability when power is off.

Mechanical loading limits include an axial shaft capacity of 111 N and a radial limit of 67 N, safeguarding the bearing set during belt tension or thrust loading. The laminated housing measures 77.7 mm long, 56.9 mm wide, and weighs only 1 kg, allowing dense installation on multi-axis stages. Its compact body also helps the motor fit tightly spaced machine layouts where several axes share the same mounting surface. Rotor-to-stator air-gap geometry keeps detent torque low, helping the motor move smoothly during micro-stepping and reducing disturbance at the tool point.