Product Description:

The PMB33C-10114-01 is a brushless servomotor from Pacific Scientific in the PMB Brushless Servomotors series. In automated machinery, it acts as a rotary actuator that turns electrical energy from a drive into tightly regulated torque and speed for axes such as indexing tables and pick-and-place heads. A permanent-magnet rotor and electronic commutation help it deliver precise motion without the brush wear associated with older designs, keeping cycle accuracy stable over long service periods. Its brushless design also reduces routine wear items compared with brushed motor assemblies. This type of motor is commonly used where repeated start-stop motion and accurate speed regulation are required.

The motor is built on a NEMA size 34 frame, so its mounting holes align with standard American gearheads and brackets. A stack length multiple of 3 increases the active core depth, raising torque capacity while preserving the same flange footprint. Static torque is supported by a nominal stall current of 3.8 ARMS at 240 VAC, so the drive must supply that current for the axis to hold position under full load. Rotor position feedback comes from a 2048 ppr incremental encoder with commutation tracks, giving the controller both fine resolution and the electrical phase reference it needs. Power and feedback conductors exit the housing as flying leads with AMP connectors, allowing custom-length cable routing in machine installations.

The feedback element is a digital encoder with commutation, enabling immediate torque commands as the rotor moves through each electrical sector. To block lubricant migration into the interior, a shaft seal surrounds the output journal, helping protect the motor when it is coupled to gearboxes or timing pulleys. The sealed front end helps limit contamination around the bearing area during normal operation. The output journal is round, so clamp-style couplings fit without keyway stress concentrations.