Product Description:

The PMB33E-20100-01 servomotor is manufactured by Pacific Scientific as a member of the PMB Brushless Servomotors series. This brushless AC unit converts drive commands into controlled rotary motion for automated assembly tables, indexing conveyors, and similar equipment where tight position and velocity regulation are required. It is suited to repeated start-stop cycles and coordinated axis movement in industrial automation. By eliminating brush wear, it reduces scheduled maintenance while still delivering the rapid torque response needed in motion systems.

The motor is built on a NEMA Size 34 frame, so its 3.4-inch square face aligns with common servo brackets found on mid-range machinery. This frame size helps the motor fit established mounting patterns without requiring custom adapter plates in many installations. During stall conditions, it can draw up to 7.4 ARMS from a 240 VAC drive, which indicates the current level the drive must support during sustained loading. Power and feedback leave the housing through flying leads with AMP connectors, and this pigtail style simplifies routing in tight cabinets. Rotor position is reported by a resolver, enabling analog angle feedback that remains reliable in high-temperature or high-vibration zones. Output torque is transferred through a shaft machined with a square key, allowing direct coupling to pulleys, gears, or flexible couplings without additional machining.

A factory-installed shaft seal is included under the customization option, helping to limit lubricant egress and particulate ingress at the flange interface. The electromagnetic section uses three lamination stacks, indicated by the stack length multiple of 3. This longer active iron length increases the torque capacity available from the motor. The motor is intended for closed-loop servo applications where stable feedback and a sealed shaft interface are useful.