Product Description:

The S33GMNA-RNNM-00 belongs to the S Brushless Motors series manufactured by Pacific Scientific. It is a 6-pole neodymium magnet brushless servo motor built for industrial automation tasks that need repeatable torque and accurate velocity regulation. The design follows a metric mounting pattern, allowing direct attachment to ISO-based machinery, and it uses a size 21 frameless resolver as its primary feedback device so the drive can track rotor position in real time.

This motor supplies a continuous stall torque of 5.3 Nm, so it can hold static loads within its thermal limits, and it can reach a peak torque of 15.3 Nm during transient accelerations. A torque constant of 1.9 Nm/ARMS links commanded current to generated torque, which helps keep current loop behavior predictable. The phase-to-phase resistance is 8.4 Ohms, which affects the voltage required for a given current, while the line-to-line inductance is listed as 25.2, which limits the rate at which current can change and affects drive bandwidth. The winding is type G, and the stator uses a three-stack configuration to achieve the stated power density. The motor does not include a holding brake, so power-off position retention must be provided by external means.

Dynamic behavior is influenced by a rotor inertia of 0.48 × 10⁻³ kg·m², allowing rapid speed changes without excessive controller effort, and the assembly mass is 6.5 kg, which helps reduce the load on moving machine elements. The housing matches the NEMA 34 frame envelope and is supplied without a shaft seal, which should be considered in dusty or wet environments. The voltage constant is 1.19 VRMS/rad/sec, indicating the back EMF the drive must overcome during motion. Termination is through a motor-mounted MS connector, and no secondary feedback device is present.