Product Description:

The R33SSNC-SS-NS-NV-02 is a servo motor manufactured by Pacific Scientific for the R Servomotors series. It converts commanded current into controlled torque and speed so automated axes in packaging, material-handling, or electronic assembly lines can follow precise motion profiles. In closed-loop motion systems, the motor works with a servo amplifier and encoder feedback to regulate position, speed, and torque during frequent starts and stops. The square, compact form factor allows the motor to fit into tight mechanical envelopes while still supplying the continuous output needed for round-the-clock production tasks. Its compact body also helps when adjacent components leave little clearance around the axis.

At stall, the rotor can withstand 2.5 Nm continuously, which is the continuous torque available for load holding without overheating. For fast indexing moves, it rises momentarily to a peak of 6.54 Nm, giving extra headroom for acceleration or short shock loads. Dynamic behavior is influenced by the reflected inertia of 0.093 kg·m²×10⁻³, which helps the servo loop respond quickly to speed changes. Lower inertia can also reduce the effort required from the drive during rapid reversals and settling moves. The mounting face is a 3.25" square, matching common NEMA bolt circles used in compact motion systems. Torque density is improved by the use of rare earth (samarium cobalt) magnets, which support stable magnetic performance at elevated winding temperatures.

The mechanical enclosure follows the manufacturer's C housing style, offering a straight cylindrical exterior that mates with clamps or cradle mounts and helps route cabling along the frame. Laminated steel length is limited to a stack of 3 inches, balancing thermal mass with overall weight. The unit ships without a holding brake, so static load retention must be handled by the drive or an external locking device when the axis is stopped. There is no shaft seal, so installations should avoid direct coolant spray or heavy airborne contamination. Position information is delivered solely by the primary encoder because there is no secondary feedback device, which simplifies the feedback path but does not provide redundant sensing.