Product Description:

The S33HNAA-RNNM-00 is a 6-pole Neodymium magnet brushless servo motor from Pacific Scientific, delivered within the S Brushless Motors series. In closed-loop motion systems, it provides precise rotary actuation for indexing tables, pick-and-place arms, and other automated axes that rely on rapid torque transitions. A size 21 frameless resolver supplies primary position feedback, and the H-type winding is optimized for medium-voltage servo amplifiers. Because the housing follows the NEMA frame standard, mechanical integration is straightforward in existing setups that use a NEMA 34 footprint.

At stall, the motor can deliver a continuous torque of 5.3 Nm, indicating the sustained load it may hold without exceeding thermal limits. During rapid accelerations, the electromagnetic design permits a peak torque of 15.3 Nm, giving extra headroom for overcoming inertial or frictional spikes. Each ampere of phase current yields a torque increment of 0.9 Nm/ARMS, a ratio that guides current-loop tuning. The three-phase winding presents an inductance of 6.3 mH and a phase-to-phase resistance of 2.1 Ohms; together, these electrical values influence rise time, copper losses, and drive sizing. A back-EMF constant of 0.56 VRMS/rad/sec relates shaft speed to generated voltage, letting the controller predict regenerative energy during deceleration. The magnetic core uses a three-stack layout to increase flux density without lengthening the frame.

The motor mass is 6.5 kg, which provides a compromise between structural stiffness and ease of handling during installation. Rotor inertia registers at 0.48 kg·m² ×10⁻³; this low moment supports fast speed reversals without excessive drive current. A 24 V dc holding brake is integrated for vertical axes that must remain locked when power is removed. No secondary feedback channel is present, and the shaft end is unsealed, so external protection against contaminants may be required. Power and feedback terminations are made through a motor-mounted MS connector, completing the wiring interface.