Product Description:

The PMB33E-20101-01 is a brushless servomotor produced by Pacific Scientific. It is intended for closed-loop velocity or position control, where commanded current is converted into proportional torque for axes on pick-and-place stations, indexing tables, or packaging machinery. The motor uses a laminated steel core and stator windings sized for moderate-inertia applications, which supports quick reversal and tight following control in compact machine layouts. This arrangement helps the axis respond cleanly during repeated starts, stops, and direction changes.

With a frame size of NEMA Size 34, the motor uses flange and pilot dimensions common in many servo installations. On a supply of up to 240 VAC, the windings draw a nominal stall current of 7.4 ARMS, and that current marks the point where heat rise becomes the main operating limit. Rotor position feedback comes from a Hall sensor set spaced at 120°, which gives the drive coarse commutation data during startup and low-speed operation. Power and signal conductors exit through flying leads with AMP connectors, so separate inline plugs are not required at the housing. The shaft ends in a square key, allowing couplings or pulleys to be secured against slip under peak load.

A factory-installed shaft seal can be specified to protect the front bearing from coolant spray or airborne particles in washdown areas. Internally, the laminated core uses a stack length multiple of 3, which adds active iron without changing the outer diameter and increases torque per unit length. The winding pitch, magnet grade, and insulation system follow the standard practice used by Pacific Scientific, so thermal behavior remains consistent from one assembly to another. Within the PMB Brushless Servomotors series, that approach allows higher torque variants to be created by changing stack count while keeping the same mounting pattern, feedback method, and cable style.