Product Description:

Pacific Scientific manufactures the S33HNNA-RNVM-00 servo motor within its S Brushless Motors series. The unit is a 6-pole neodymium magnet model that provides closed-loop rotary motion for packaging lines, pick-and-place heads, and similar automation axes. It pairs with digital drives that read resolver feedback to maintain velocity and torque accuracy during operation.

At standstill, the motor can supply 5.3 Nm of continuous torque without exceeding rated thermal limits, enabling it to support moderate loads when the axis is idle. A torque constant of 0.9 Nm/ARMS links commanded current to output torque, which helps the drive relate current demand to motor response. The three-phase winding presents 6.3 mH of line-to-line inductance and 2.1 ohms of resistance, values that influence current ripple and copper heating under PWM drives. During acceleration bursts, the rotor can develop up to 15.3 Nm, providing added torque for breakaway demand and short-term load changes. The frame follows the general NEMA mounting standard, and a three-stack magnetic core uses configuration H. Power and feedback lines exit through a motor-mounted MS connector.

For mechanical integration, the housing weighs 6.5 kg, so gantry axes can account for its mass without heavy counterbalancing. The face mounting follows the NEMA 34 bolt circle, allowing replacement of stepper motors that use the same footprint. Dynamic behavior is supported by a rotor inertia of 0.48 kg·m² × 10⁻³, balancing responsive positioning with load stability. A voltage constant of 0.56 VRMS/rad/sec gives the back EMF seen by the drive, which helps with bus voltage selection and regenerative energy control. Position feedback comes from a Size 21 frameless resolver, and no secondary transducer is present. A Viton shaft seal limits lubricant migration into the motor cavity, and the motor comes without a holding brake, so external hardware must secure vertical loads when power is removed.