PMB31B-00214-01 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific PMB31B-00214-01 is a brushless servomotor from the PMB Brushless Servomotors series with a NEMA Size 34 frame and a flat shaft design. It features a digital encoder with commutation and 2048 pulses per revolution resolution. This motor is equipped with flying leads with MS connectors and includes a shaft seal for customization.
Internal Product Review
The PMB31B-00214-01 is a Pacific Scientific PMB Series brushless servomotor in a NEMA Size 34 frame. A digital encoder with commutation and 2048 ppr resolution support clean feedback and dependable positioning in motion-control assemblies. A flat shaft and shaft seal make the unit a strong choice for servo applications needing practical integration and stable operation.
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Product Description:
The PMB31B-00214-01 is a brushless servomotor built by Pacific Scientific for the PMB Brushless Servomotors series. It is a permanently excited motor intended for closed-loop drive systems. In service, it converts electrical energy into controlled shaft torque and speed for packaging stations, pick-and-place units, and light machine tools. Its brushless design supports accurate positioning and repeatable motion during rapid starts, stops, and speed changes.
With a frame coded as NEMA size 34, the motor occupies a 3.4-inch square mounting footprint that matches many legacy stepper installations and eases integration on existing mounting patterns. During locked-rotor testing at 240 VAC, the winding draws a nominal stall current of 2.7 ARMS, which is used to size the amplifier’s continuous current rating. Rotor position is captured by an optical feedback device that delivers 2048 ppr, supporting fine velocity loops and precise positioning. The feedback element is a digital encoder with commutation, so drive currents stay synchronized without separate Hall sensors. A machined shaft flat on the output shaft provides a positive interface for couplings or pulleys and helps keep rotor inertia low for fast acceleration.
Power and feedback exit the housing through flying leads with MS connectors, which allows cable routing through tight spaces before final connection. This connection style keeps the motor body compact and avoids a large fixed terminal housing at the rear. The motor has a factory-installed shaft seal that helps guard the front bearing against coolant mist or fine dust. The Stack Length Multiple of 1 corresponds to the shortest lamination stack in the series, favoring a compact package where installation space is limited. The shorter stack also reduces overall motor length, which can help on axes with limited mounting depth.
