Product Description:

The PMB33C-00216-03 brushless servomotor is built by Pacific Scientific and belongs to the PMB Brushless Servomotors series. The unit converts drive current into controlled torque for positioning and velocity loops within industrial automation axes. Its electromagnetic design suits tight space envelopes where a frame-34 motor must deliver continuous servo performance in compact installations. It is well suited for compact indexing, conveying, and handling axes that require repeatable response without a larger motor frame. In automated machinery, this type of motor is often paired with a servo drive that must handle frequent start-stop motion.

The frame conforms to NEMA Size 34, giving a 3.4-inch square mounting face that simplifies interchange with standard gearheads or brackets. Rotor position is reported by a 4096 ppr incremental encoder, which provides 12-bit resolution for high-bandwidth control loops and accurate speed feedback. With a maximum bus voltage of 240 V AC, the motor draws a nominal stall current of 3.8 ARMS, so the selected drive must support that continuous phase load while still allowing margin for acceleration. Power and feedback leave the housing through flying leads with MS connectors, which helps reduce rear clearance. This arrangement is useful when cable routing must stay compact behind the motor body. The feedback channel uses a digital encoder with commutation, so the controller can read incremental pulses and Hall signals from the same device.

A factory-installed combination of a shaft seal and PTC thermistor protects the bearings from airborne coolant and allows the drive to react to winding temperature rise. Torque is transmitted through a flat shaft, allowing set-screw couplings to clamp securely without keys. The magnetic stack uses a stack length multiple of 3, which balances rotor inertia and continuous torque within the limits of this frame size. These features support compact servo applications where stable thermal behavior and straightforward mechanical coupling are required.