Product Description:

The PMB33C-20214-01 is a brushless servomotor built by Pacific Scientific and supplied under the PMB Brushless Servomotors series. As a direct-coupled rotary actuator, it converts drive current into controlled mechanical torque for gantries, pick-and-place modules, and packaging axes that demand high cycle accuracy. Integrated feedback allows the drive controller to command position, speed, and acceleration with minimal following error, making the unit a core element of industrial automation cells. The brushless design also supports repeatable response during frequent starts, stops, and reversals.

With a frame coded as NEMA Size 34, the motor fits standard mounting patterns while leaving room for larger bearings that increase radial load capacity. At the nominal bus voltage of 240 VAC, the stator can deliver a nominal stall current of 3.8 ARMS, enabling constant torque production at standstill without overheating. Rotor position is reported by a 2048 ppr incremental track, and the built-in digital encoder with commutation supplies both incremental counts and Hall signals so the drive can align phase currents immediately after power-up. This arrangement supports stable low-speed control and accurate position updates during repeated indexing moves.

Power and feedback exit the housing through flying leads with MS connectors, which allow cable routing without opening the enclosure. A square key on the shaft transfers torque to couplings while helping prevent slip during high-load reversals, and a factory-applied shaft seal helps keep contaminants away from internal components. The sealed output end is useful on machinery where light oil mist or airborne debris could shorten encoder life. The rotor uses a 3-length lamination pack, which increases continuous torque without increasing the motor's outer diameter.