PMB31D-10201-03 Pacific Scientific
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The Pacific Scientific PMB31D-10201-03 is a brushless servomotor from the PMB Brushless Servomotors series with a NEMA Size 34 motor frame and a round shaft design. It features flying leads with MS connectors, a Hall sensor type, and offers a nominal stall current of 5.4 ARMS at 240 Vac maximum. This model includes a shaft seal and PTC thermistor for customization.
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Product Description:
The PMB31D-10201-03 is a brushless servomotor built for closed-loop motion tasks in automated machinery. It belongs to Pacific Scientific's servomotor line and converts drive current into controlled torque for positioning stages, feeders, and indexing tables operating under changing loads. Electronic commutation supports smooth operation and reduces the maintenance concerns associated with brushed motor designs. Integrated feedback components also help the drive maintain repeatable speed and position during start-stop cycles.
The frame uses the NEMA Size 34 standard, allowing installation on mounts that follow this common flange pattern. Continuous stall performance is rated at 5.4 ARMS when the motor is supplied from a maximum of 240 VAC, which helps determine suitable drive capacity during static holding conditions. Power and feedback exit the housing through flying leads with MS connectors, which keeps the cable interface straightforward for machine wiring. Rotor position is detected by an embedded Hall sensor, allowing the drive to commutate the motor without an external encoder when basic feedback is sufficient. Mechanical output is transferred through a round shaft that can accept press-fit pulleys or flexible couplings without keyway machining. This arrangement is useful where compact packaging and simple cable routing are important.
For applications exposed to oil mist or fine dust, the motor is supplied with a shaft seal and a PTC thermistor. The seal helps block contaminants at the output journal, while the thermistor sends temperature information to the drive for overload protection. Electromagnetic output comes from a stack length multiple of 1, which keeps inertia low for rapid acceleration. This combination supports responsive motion while adding basic protection against heat buildup and contamination.
