PMB31B-20216-03

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The PMB31B-20216-03 is a brushless servomotor designed with NEMA Size 34 dimensions and a peak torque of 6.26 Nm. Manufactured by Pacific Scientific, it is part of the PMB Brushless Servomotor Series, featuring a rated speed of 2,700 RPM. This motor includes flying leads with MS connectors and 4096 ppr digital encoder resolution.

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Product Description:

This PMB31B-20216-03 Pacific Scientific brushless servomotor is customized with a PTC thermistor and a shaft seal. The motor has a B winding code. This product depicts accurate positioning capabilities. The device can’t be put to use without its matching digital servo drive. This unit comprises bearings with double shielding. Its housing comprises exit points for its connectors or wires. The motor’s ball bearing system stimulates the free movement of the rotor.

This product’s shaft seal offers protection against the ingress of water. The device showcases a less air gap between its rotor and stator. This unit has smooth synchronization because of its high torque. Its magnets supply a constant magnetic flux. The motor’s bearings can withstand the anticipated load limits. This product delivers better efficiency and performance than a standard motor during high-speed operation. The device’s magnets have noteworthy electromagnetic properties. This unit’s housing features resistance to corrosion. It can withstand harsh industrial conditions.

This motor has an extended lifespan because of rapid heat transfer from its stator, resulting in low thermal buildup. The product is intended to provide dynamic and precise motion control. This device has no negative effect on the surroundings with its operation. The unit is not only lightweight but also small in size. It can be deployed for automation applications such as conveyor systems, CNC machinery, and robotics. The brushless servomotor is also suitable for applications where safety is of prime concern. This product isn’t recommended for residential or household use. The device has a distance of 1.414 inches between any two consecutive mounting holes. This unit has a viscose damping coefficient of 0.038 Nm/kRPM. It features easy portability.

Connector Type
Flying leads with MS connectors
Continuous Stall Torque
2.11 Nm (18.7 lb-in)
Encoder Resolution
4096 ppr
Line-to-line Inductance
19.6 mH
Line-to-line Resistance
7.6 Ω
Motor Size
NEMA Size 34
Nominal Stall Current @240vac Max
2.7 ARMS
Peak Torque
6.26 Nm (55.4 lb-in)
Rated Speed
2,700 RPM
Rated Voltage Bus
240 VAC, 320 VDC
Sensor Type
Digital Encoder with commutation
Stack Length Multiple
1
Torque Constant (rms)
0.79 Nm/ARMS (7.03 lb-in/ARMS)
Voltage Constant (rms)
0.49 VRMS/rad/sec (51.3 VRMS/kRPM)
Weight (motor Only)
2.5 kg (5.5 lb)
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Frequently Asked Questions about PMB31B-20216-03:

Q: How is the PMB31B-20216-03 motor protected against thermal overload?

A: The PMB31B-20216-03 motor is protected against thermal overload by the PTC thermistor.

Q: What is the function of the shaft seal of the PMB31B-20216-03 motor?

A: The shaft seal safeguards the PMB31B-20216-03 motor against the ingress of water.

Q: How many cables are used to connect the PMB31B-20216-03 motor?

A: Two cables are used to connect the PMB31B-20216-03 motor.

Q: What kind of encoder does the PMB31B-20216-03 motor use for feedback?

A: The PMB31B-20216-03 motor uses a digital encoder for feedback.

Q: What connectors is the PMB31B-20216-03 motor equipped with?

A: The PMB31B-20216-03 motor is equipped with MS connectors.


Internal Product Review

  • ‘‘PMB31B-20216-03’’

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