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Allen-Bradley MPL-B4560F-MJ72AA Low-Inertia Servo Motor – Technical Specifications, Applications, Advantages and Model Selection Guide

1. Product Overview

The Allen-Bradley MPL-B4560F-MJ72AA is a high-performance AC rotary servo motor from the MP-Series MPL low-inertia servo motor family.

It is designed for industrial motion-control systems that require a combination of high continuous torque, high peak torque, fast acceleration and deceleration, accurate positioning, reliable feedback and compact mechanical integration.

The MPL-B4560F-MJ72AA uses a 130 mm frame with a 152.4 mm magnet stack, giving it a larger active motor length than the shorter B4530F and B4540F configurations.

The motor is rated for 3000 rpm, with approximately 14.1 N·m continuous stall torque, approximately 34.4 N·m peak torque, and approximately 3.2 kW continuous rated output.

The MJ72AA configuration combines a multi-turn high-resolution absolute encoder, keyed shaft extension, SpeedTEC DIN right-angle connector, and no integrated brake.

This combination makes the motor particularly suitable for industrial machine axes where higher torque is required but the machine still benefits from the dynamic characteristics of a low-inertia servo motor.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Servo Motor Series	MPL Low-Inertia Servo Motors
Product Type	AC Rotary Brushless Servo Motor
Model	MPL-B4560F-MJ72AA
Voltage Class	460 V AC / 400 V-class system
Motor Frame	130 mm
Magnet Stack Length	152.4 mm
Rated Speed	3000 rpm
Feedback	Multi-turn high-resolution absolute encoder
Feedback Resolution	1024 Sin/Cos cycles/rev class
Feedback Protocol	Hiperface-type absolute feedback
Shaft	Keyed shaft extension
Brake	No brake
Connector	SpeedTEC DIN
Connector Configuration	Right-angle, 180° rotatable
Mounting	IEC metric flange
Mounting Holes	Free mounting holes, Type FF
Motor Construction	Low-inertia brushless permanent-magnet servo motor
Primary Application	Industrial servo motion control

The MPL-B4560F-MJ72AA belongs to the MPL low-inertia servo motor series, which is intended for applications where the motor must repeatedly accelerate, decelerate, reverse and position mechanical loads with controlled servo response.

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3. Detailed Technical Parameters

3.1 Electrical and Performance Parameters

Parameter	Specification
Model	MPL-B4560F-MJ72AA
Motor Type	Brushless AC rotary servo motor
Voltage	460 V AC class
Voltage Class	400 V AC / 460 V system class
Rated Speed	3000 rpm
Maximum Speed	3000 rpm
Continuous Stall Torque	14.1 N·m
Peak Stall Torque	34.4 N·m
Continuous Rated Power	3.2 kW
Speed at Rated Output	3000 rpm
Rotor Inertia	Approx. 0.00078 kg·m²
Feedback Type	Multi-turn high-resolution absolute encoder
Feedback Resolution	1024 Sin/Cos cycles/rev class
Feedback Protocol	Hiperface-type
Shaft Type	Keyed shaft extension
Shaft Seal	No shaft seal in standard configuration
Brake	No brake
Connector	SpeedTEC DIN
Connector Direction	Right-angle
Connector Rotation	180° rotatable
Mounting	IEC metric flange
Mounting Hole Type	Free mounting holes, Type FF
Frame Size	130 mm
Magnet Stack	152.4 mm
Approx. Motor Weight	11.82 kg
Approx. Overall Dimensions	Approx. 229 × 305 × 255 mm class*
Typical Protection Configuration	IP50 standard; higher protection possible with appropriate sealing configuration
Maximum Operating Temperature	Approx. 40 °C
Cooling	Natural convection / machine-mounted cooling

*Overall dimensions are provided as practical reference dimensions. Connector position, shaft arrangement and environmental sealing configuration can affect the final installation envelope. The mechanical drawing should be used for final machine design.

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4. Mechanical Dimensions and Weight

The B4560F configuration uses a 130 mm frame and a 152.4 mm magnet stack.

The longer stack is one of the main differences between this motor and the shorter B4530F and B4540F MPL motors.

Mechanical Parameter	Specification
Model	MPL-B4560F-MJ72AA
Frame Size	130 mm
Frame Class	Frame 45
Magnet Stack Length	152.4 mm
Stack Designation	60
Approx. Overall Length	Approx. 305 mm class*
Approx. Overall Width	Approx. 229 mm class*
Approx. Overall Height	Approx. 255 mm class*
Shaft	Keyed
Shaft Extension	Keyed shaft extension
Shaft Seal	None in standard configuration
Brake	None
Mounting Flange	IEC metric
Mounting Hole Style	Free mounting holes, Type FF
Connector	SpeedTEC DIN
Connector Orientation	Right angle
Connector Adjustment	180° rotatable
Approx. Motor Weight	11.82 kg
Approx. Weight in Pounds	Approx. 26 lb

*The exact mechanical envelope should be verified against the applicable mechanical drawing before fabrication of the machine mounting plate, gearbox interface or enclosure.

The approximately 11.82 kg motor weight reflects the larger 152.4 mm stack configuration.

The additional active motor length provides higher torque capacity compared with shorter MPL frame-45 motors.

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5. Model Number Explanation

The catalog number MPL-B4560F-MJ72AA can be understood by breaking the designation into its main configuration elements.

Model Section	Meaning
MPL	MP-Series low-inertia servo motor
B	400 V / 460 V-class servo motor family
45	130 mm frame-size class
60	152.4 mm magnet stack
F	3000 rpm speed class
M	Multi-turn high-resolution absolute feedback
J	Keyed shaft extension
7	SpeedTEC DIN right-angle connector, 180° rotatable
2	No brake
AA	Standard mounting / factory configuration

This model-number structure is important when replacing an existing motor.

Two MPL motors can have the same frame size and rated speed but differ in stack length, feedback, shaft construction or brake configuration.

For this reason, the complete model number should be checked before ordering or installing a replacement motor.

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6. Product Introduction

The Allen-Bradley MPL-B4560F-MJ72AA is intended for medium-to-high torque industrial servo applications.

Its 130 mm frame and 152.4 mm magnet stack provide approximately 14.1 N·m continuous torque and approximately 34.4 N·m peak torque.

The motor’s 3.2 kW continuous output places it above the B4530F and B4540F configurations in the same general MPL family.

This makes the B4560F a practical choice when a machine axis requires more torque than the shorter 76.2 mm or 101.6 mm stack configurations can provide.

The motor uses a low-inertia rotor design.

Low rotor inertia is valuable in servo systems because the motor frequently changes speed rather than simply running continuously at a fixed speed.

A low-inertia motor can respond efficiently to acceleration and deceleration commands, particularly when the mechanical load is properly matched to the motor.

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7. Main Performance Characteristics

7.1 14.1 N·m Continuous Torque

The motor provides approximately 14.1 N·m of continuous stall torque.

This is a significant increase compared with the approximately 8.25 N·m capability of the B4530F and the approximately 10.2 N·m capability of the B4540F.

The higher continuous torque makes the B4560F suitable for machine axes with heavier sustained loads.

Typical examples include:

• Material-handling axes.
• Packaging machine drives.
• Rotary indexing systems.
• Converting machinery.
• Machine-tool feed systems.
• Automated assembly equipment.
• High-load positioning stages.
• Industrial transfer systems.

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7.2 34.4 N·m Peak Torque

The motor can provide approximately 34.4 N·m peak stall torque for short-duration operating conditions.

Peak torque is important when the machine needs additional torque during:

• Acceleration.
• Deceleration.
• Rapid positioning.
• Direction reversal.
• Temporary load increases.
• Mechanical disturbance recovery.
• High-speed indexing.

The peak value should not be treated as a continuous operating rating.

Actual permissible peak operation depends on the drive, motor temperature, operating cycle, ambient conditions and complete motion profile.

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8. 3.2 kW Continuous Output

The MPL-B4560F-MJ72AA is rated at approximately 3.2 kW continuous output.

This makes it a useful intermediate motor size for applications where a smaller 2.1 kW or 2.6 kW servo motor is insufficient but a substantially larger 5.4 kW servo motor would be unnecessarily large.

The 3.2 kW rating provides a good balance between motor size and available mechanical output.

For machine builders, this can help avoid over-sizing the servo motor while still maintaining adequate torque capacity.

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9. 3000 RPM Rated Speed

The motor is designed for a 3000 rpm rated speed.

This speed is well suited to many industrial servo applications.

The 3000 rpm class can be combined with:

• Gearboxes.
• Belt drives.
• Ball screws.
• Rack-and-pinion mechanisms.
• Rotary tables.
• Precision couplings.
• Linear actuators.
• Indexing mechanisms.

A 3000 rpm motor can provide a good balance between torque and rotational speed.

For many machine axes, extremely high speed is less important than maintaining stable torque and accurate positioning throughout the operating range.

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10. Multi-Turn Absolute Encoder

One of the most important features of the MJ72AA configuration is its multi-turn high-resolution absolute feedback.

The multi-turn encoder is designed to track motor position over multiple revolutions.

This is useful in systems where the controller needs to know not only the angular position within a single revolution but also the accumulated position across multiple turns.

Typical applications include:

• Ballscrew-driven linear axes.
• Rotary positioning systems.
• Long-travel machine axes.
• Precision indexing.
• Automated assembly.
• Packaging machines.
• Material-handling systems.
• Position-controlled transmission systems.

The high-resolution feedback provides the servo drive with detailed motor-position information for closed-loop control.

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11. Advantages of Multi-Turn Feedback

Compared with a basic single-turn feedback arrangement, multi-turn absolute feedback can be advantageous in applications where the axis position may span many motor revolutions.

For example, a ballscrew may require several motor revolutions to complete a single machine movement.

A multi-turn feedback system provides the control system with additional position information across those revolutions.

This can simplify machine positioning strategies and is particularly useful where absolute position information is important.

The actual behavior after power cycling depends on the complete feedback system, drive architecture and machine-control configuration.

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12. Keyed Shaft Extension

The MPL-B4560F-MJ72AA uses a keyed shaft extension.

The keyed shaft is a conventional and widely used industrial mechanical interface.

It is well suited to:

• Keyed couplings.
• Gearboxes.
• Timing pulleys.
• Chain drives.
• Mechanical transmission components.
• Rotary tables.
• Industrial gear reducers.
• Shaft-mounted mechanical assemblies.

A keyed shaft can be preferred when the existing machine architecture already uses standard keyed mechanical components.

Compared with the keyless K configuration, the J configuration is often easier to integrate into traditional mechanical drive arrangements.

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13. No Integrated Brake

The MJ72AA configuration is supplied without an integrated brake.

This configuration is appropriate for applications where the servo motor does not need an internal mechanical holding brake.

Typical examples include horizontal axes where gravity does not create a significant back-driving force.

The absence of a brake can also simplify the motor configuration and reduce brake-related wiring requirements.

For vertical axes or applications where the motor shaft must be mechanically held after servo disable, a brake-equipped version such as the corresponding MJ74AA configuration may be more appropriate.

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14. SpeedTEC DIN Connector

The motor uses a SpeedTEC DIN right-angle connector.

The connector is designed to provide a compact connection arrangement suitable for industrial servo systems.

The connector can be rotated approximately 180 degrees, allowing greater flexibility when routing motor cables.

This is useful when the motor is installed:

• Inside a compact machine.
• Close to a gearbox.
• Near another servo motor.
• Inside a restricted mechanical enclosure.
• On a moving machine axis.
• In a high-density automation system.

Correct connector orientation can reduce cable interference and make machine assembly easier.

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15. IEC Metric Mounting

The motor uses IEC metric flange mounting.

This provides a standardized mounting approach for machine builders.

The Type FF free-mounting-hole configuration provides flexibility when designing the motor mounting interface.

The motor can therefore be integrated into a variety of industrial machine structures, provided that the mechanical dimensions, shaft alignment, allowable loads and mounting clearances are correctly evaluated.

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16. Low-Inertia Motor Design

The low-inertia construction is one of the defining characteristics of the MPL series.

Servo motors are frequently required to accelerate and decelerate repeatedly.

The motor does not simply operate at a constant speed like a conventional induction motor.

Instead, the servo drive continuously changes the motor torque according to the machine motion profile.

The B4560F motor has a rotor inertia of approximately 0.00078 kg·m².

This allows the motor to respond efficiently to changes in speed and position.

The final machine response, however, depends on the total inertia ratio between motor and load.

The gearbox ratio, ballscrew, coupling, belt, pulley, load mass and mechanical friction all influence the actual servo response.

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17. Main Product Advantages

17.1 Higher Torque Capacity

The approximately 14.1 N·m continuous torque rating provides more torque capacity than the shorter B4530F and B4540F motors.

This makes the motor suitable for heavier machine axes without immediately moving to a substantially larger frame.

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17.2 Strong Peak Torque

The approximately 34.4 N·m peak torque capability provides additional torque for acceleration and transient machine loads.

This is especially useful for high-cycle automation equipment.

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17.3 3.2 kW Power Rating

The 3.2 kW output rating makes the motor suitable for medium-duty and moderately heavy-duty servo applications.

It occupies a useful position between smaller 2 kW-class servo motors and larger 5 kW-class motors.

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17.4 Multi-Turn Absolute Feedback

The multi-turn high-resolution encoder provides detailed position feedback across multiple motor revolutions.

This is useful for precision positioning systems and long-travel axes.

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17.5 Keyed Shaft

The keyed shaft is compatible with a wide range of conventional industrial mechanical components.

This can simplify integration into existing machine designs.

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17.6 Low-Inertia Response

The low-inertia motor design supports rapid acceleration and deceleration.

This is especially valuable in machines with frequent indexing and direction changes.

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17.7 Flexible Connector Orientation

The right-angle SpeedTEC DIN connector and 180-degree rotation capability make cable routing easier in compact machinery.

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17.8 Compact Torque Density

The motor provides approximately 14.1 N·m continuous torque from a 130 mm frame.

This represents a useful torque-to-size relationship for industrial automation equipment.

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18. Typical Applications

18.1 Packaging Machinery

Packaging machines are a natural application for low-inertia servo motors.

The MPL-B4560F-MJ72AA can be considered for:

• Product indexing.
• Film feeding.
• Rotary cutting.
• Cartoning.
• Sealing mechanisms.
• Product transfer.
• Label positioning.
• Packaging conveyors.
• High-speed indexing systems.

The multi-turn encoder is useful where precise shaft position must be maintained over several motor revolutions.

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19. Material Handling

Material-handling equipment frequently requires accurate control of acceleration, deceleration and positioning.

Potential applications include:

• Conveyor positioning.
• Transfer systems.
• Shuttle mechanisms.
• Sorting equipment.
• Automated loading systems.
• Rotary transfer stations.
• Linear positioning systems.

The 14.1 N·m continuous torque capability provides a useful level of mechanical output for medium-duty material-handling applications.

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20. Automated Assembly Equipment

Assembly machinery often requires repeatable positioning with controlled acceleration.

The motor can be used in:

• Component positioning.
• Rotary assembly stations.
• Pick-and-place mechanisms.
• Insertion equipment.
• Tool positioning.
• Workpiece indexing.
• Automated inspection stages.

The multi-turn absolute feedback configuration is useful where the machine axis travels through multiple motor revolutions.

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21. Printing and Converting Machinery

Printing and converting systems often require coordinated motion between several axes.

Potential applications include:

• Web feeding.
• Roller positioning.
• Material indexing.
• Cutter positioning.
• Registration control.
• Tension-related motion systems.
• Rotary conversion equipment.

The low-inertia design can be useful in applications where the motor repeatedly changes speed in synchronization with the machine process.

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22. Machine Tools

The motor can be used for selected machine-tool axes and auxiliary motion systems.

Applications can include:

• Feed axes.
• Positioning mechanisms.
• Automatic tool-changing mechanisms.
• Rotary indexing.
• Workpiece positioning.
• Auxiliary feed systems.

The 3000 rpm speed rating allows the motor to work with mechanical transmission systems such as ballscrews and gearboxes.

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23. Electronics Manufacturing Equipment

Electronics production machinery often requires repeatable, controlled movement.

Potential applications include:

• Component positioning.
• Inspection stages.
• Assembly stations.
• Precision transfer systems.
• Feeder mechanisms.
• Automated handling.
• Small positioning platforms.

The high-resolution multi-turn feedback can provide the position information needed for closed-loop motion control.

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24. Automotive Manufacturing Equipment

Automotive production machinery often uses servo motors for synchronized positioning and automated mechanical operations.

Possible applications include:

• Robotic auxiliary axes.
• Material transfer.
• Component positioning.
• Assembly fixtures.
• Automated feeders.
• Press-feed systems.
• Part handling.
• Indexing stations.

The B4560F motor can be useful when the machine requires more torque than smaller MPL motors can provide.

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25. Metal Forming and Industrial Processing

The motor can also be considered for selected metal-processing applications where controlled servo positioning is required.

Potential uses include:

• Feed mechanisms.
• Positioning axes.
• Material transfer.
• Indexing.
• Tool positioning.
• Auxiliary forming-machine axes.

The actual suitability depends on the machine’s peak torque, continuous torque, duty cycle and mechanical load requirements.

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26. Electrical Integration Considerations

The MPL-B4560F-MJ72AA should be evaluated as part of a complete servo system.

The servo drive must be properly matched to:

• Motor voltage.
• Motor current.
• Continuous torque.
• Peak torque.
• Feedback type.
• Feedback interface.
• Acceleration profile.
• Machine duty cycle.

The multi-turn absolute encoder configuration should be compatible with the selected servo-drive architecture.

Correct motor and drive matching is essential for achieving stable servo operation.

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27. Mechanical Integration Considerations

Before installing the motor, the following mechanical characteristics should be checked:

• Frame size.
• Mounting-hole pattern.
• Flange dimensions.
• Shaft diameter.
• Shaft extension.
• Keyway dimensions.
• Motor length.
• Connector clearance.
• Cable-bending radius.
• Allowable radial load.
• Allowable axial load.
• Gearbox compatibility.
• Coupling compatibility.

The B4560F is longer than the B4530F and B4540F motors because of its 152.4 mm magnet stack.

The machine frame should therefore provide adequate rear and side clearance.

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28. Thermal and Duty-Cycle Considerations

The 3.2 kW rating represents a continuous motor-output capability under appropriate operating conditions.

Actual thermal performance depends on:

• Ambient temperature.
• Installation arrangement.
• Average torque.
• Motor speed.
• Acceleration frequency.
• Deceleration frequency.
• Peak torque duration.
• Machine enclosure.
• Cooling conditions.

A machine that operates at moderate average speed can still produce significant motor heating if it repeatedly accelerates and decelerates under heavy load.

For this reason, the complete motion profile should be evaluated during final motor selection.

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29. Servo Tuning Considerations

The B4560F’s low-inertia characteristics can provide a responsive servo axis, but proper tuning remains important.

The following parameters can affect machine response:

• Motor inertia.
• Load inertia.
• Inertia ratio.
• Gear ratio.
• Coupling stiffness.
• Mechanical backlash.
• Friction.
• Ballscrew characteristics.
• Belt elasticity.
• External disturbances.
• Acceleration rate.
• Deceleration rate.

A motor that is correctly matched to the mechanical load generally produces more stable motion and better positioning performance.

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30. Recommended Related Models in the MPL Series

The following models are useful alternatives when selecting a motor around the B4560F family.

Model	Frame / Stack	Speed	Continuous Torque	Peak Torque	Power	Feedback	Shaft	Brake	Approx. Weight
MPL-B4560F-MJ74AA	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	Multi-turn absolute	Keyed	24 V DC	Approx. 11.82 kg
MPL-B4560F-MK72AA	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	Multi-turn absolute	Keyless	No	Approx. 12 kg
MPL-B4560F-MK74AA	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	Multi-turn absolute	Keyless	24 V DC	Approx. 12–13 kg
MPL-B4540F-MJ72AA	130 / 101.6 mm	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	Multi-turn absolute	Keyed	No	Approx. 8.6 kg
MPL-B4530F-MJ72AA	130 / 76.2 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Multi-turn absolute	Keyed	No	Approx. 7.3 kg

The MPL-B4560F-MJ74AA is the closest direct alternative when the machine requires the same basic motor performance but needs a 24 V DC holding brake.

The MPL-B4560F-MK72AA changes the shaft from keyed to keyless while retaining the general B4560F torque and speed class.

The MPL-B4560F-MK74AA combines the keyless shaft with a 24 V DC brake.

The MPL-B4540F-MJ72AA provides a smaller and lighter alternative when approximately 10.2 N·m continuous torque is sufficient.

The MPL-B4530F-MJ72AA is a further step down in torque and physical size for applications requiring approximately 8.25 N·m continuous torque.

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31. Five Popular / Widely Used Allen-Bradley Servo Models

Model	Frame / Stack	Speed	Continuous Torque	Peak Torque	Power	Feedback	Shaft	Brake	Approx. Weight
MPL-B4540F-MJ74AA	130 / 101.6 mm	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	Multi-turn absolute	Keyed	24 V DC	Approx. 9–10 kg
MPL-B4540F-MK74AA	130 / 101.6 mm	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	Multi-turn absolute	Keyless	24 V DC	Approx. 10–12 kg
MPL-B540K-MJ72AA	165 / 101.6 mm	4000 rpm	19.4 N·m	48.6 N·m	5.4 kW	Multi-turn absolute	Keyed	No	Approx. 15 kg
MPL-B430P-MJ72AA	Approx. 115 mm class	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	Multi-turn absolute	Keyed	No	Approx. 5.5 kg
MPL-B4530F-MJ74AA	130 / 76.2 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Multi-turn absolute	Keyed	24 V DC	Approx. 7.3 kg

These five models cover a useful range of industrial servo requirements.

The MPL-B4540F-MJ74AA is suitable when a compact 2.6 kW-class motor with absolute multi-turn feedback and a brake is required.

The MPL-B4540F-MK74AA is a useful alternative where a keyless shaft is preferred.

The MPL-B540K-MJ72AA moves into a higher torque and higher-speed class and is suitable for applications requiring approximately 19.4 N·m continuous torque and 5.4 kW output.

The MPL-B430P-MJ72AA is a smaller, higher-speed motor for applications where 5000 rpm operation is more important than high continuous torque.

The MPL-B4530F-MJ74AA is a compact alternative for applications that can operate within approximately 8.25 N·m continuous torque.

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32. Direct Comparison of Closely Related Models

Parameter	MPL-B4560F-MJ72AA	MPL-B4560F-MJ74AA	MPL-B4560F-MK72AA	MPL-B4540F-MJ72AA
Frame	130 mm	130 mm	130 mm	130 mm
Stack	152.4 mm	152.4 mm	152.4 mm	101.6 mm
Rated Speed	3000 rpm	3000 rpm	3000 rpm	3000 rpm
Continuous Torque	14.1 N·m	14.1 N·m	14.1 N·m	10.2 N·m
Peak Torque	34.4 N·m	34.4 N·m	34.4 N·m	27.1 N·m
Power	3.2 kW	3.2 kW	3.2 kW	2.6 kW
Feedback	Multi-turn absolute	Multi-turn absolute	Multi-turn absolute	Multi-turn absolute
Shaft	Keyed	Keyed	Keyless	Keyed
Brake	None	24 V DC	None	None
Connector	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN
Approx. Weight	11.82 kg	Approx. 11.82 kg	Approx. 12 kg	Approx. 8.6 kg

This comparison shows that the MPL-B4560F-MJ72AA is primarily distinguished by its combination of:

3.2 kW output + 14.1 N·m continuous torque + 34.4 N·m peak torque + multi-turn absolute feedback + keyed shaft + no brake.

The MJ74AA version is the direct brake-equipped alternative.

The MK72AA version is the keyless-shaft alternative.

The B4540F-MJ72AA provides a smaller and lighter motor when the higher torque capacity of the B4560F is not required.

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33. Application Selection Guide

Machine Requirement	Recommended Model
3.2 kW, keyed shaft, multi-turn feedback, no brake	MPL-B4560F-MJ72AA
3.2 kW, keyed shaft, multi-turn feedback, 24 V brake	MPL-B4560F-MJ74AA
3.2 kW, keyless shaft, multi-turn feedback, no brake	MPL-B4560F-MK72AA
3.2 kW, keyless shaft, multi-turn feedback, brake	MPL-B4560F-MK74AA
2.6 kW, keyed shaft, multi-turn feedback	MPL-B4540F-MJ72AA
2.1 kW, keyed shaft, multi-turn feedback	MPL-B4530F-MJ72AA
Higher torque and 4000 rpm operation	MPL-B540K-MJ72AA
Smaller motor and 5000 rpm operation	MPL-B430P-MJ72AA

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34. Key Specifications at a Glance

Feature	MPL-B4560F-MJ72AA
Model	MPL-B4560F-MJ72AA
Brand	Allen-Bradley
Series	MP-Series MPL Low-Inertia Servo Motors
Motor Type	Brushless AC rotary servo motor
Voltage	460 V AC class
Frame	130 mm
Stack	152.4 mm
Rated Speed	3000 rpm
Continuous Torque	14.1 N·m
Peak Torque	34.4 N·m
Continuous Power	3.2 kW
Rotor Inertia	Approx. 0.00078 kg·m²
Feedback	Multi-turn high-resolution absolute encoder
Feedback Resolution	1024 Sin/Cos cycles/rev class
Shaft	Keyed
Brake	No brake
Connector	SpeedTEC DIN, right angle
Connector Rotation	180°
Mounting	IEC metric
Frame Size	130 mm
Magnet Stack	152.4 mm
Approx. Dimensions	Approx. 229 × 305 × 255 mm class
Approx. Weight	11.82 kg
Typical Application	Industrial motion control

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35. Overall Advantages

The MPL-B4560F-MJ72AA offers a strong combination of torque, speed, feedback resolution and mechanical compatibility.

Its biggest advantage over shorter MPL configurations is the higher torque capacity provided by the 152.4 mm stack.

With approximately 14.1 N·m continuous torque and 34.4 N·m peak torque, it can handle machine loads that would exceed the capabilities of smaller B4530F and B4540F configurations.

The 3.2 kW continuous power rating also gives the motor enough capacity for a broad range of medium-duty industrial axes.

The multi-turn absolute encoder is another major advantage.

It provides high-resolution feedback across multiple motor revolutions, making it particularly suitable for machine axes where position information must be maintained over a relatively large mechanical travel.

The keyed shaft is a practical choice for conventional industrial mechanical transmission systems.

The SpeedTEC DIN right-angle connector provides additional flexibility during machine installation and cable routing.

The motor’s low-inertia construction further supports responsive servo operation, particularly in machines with frequent acceleration, deceleration and indexing cycles.

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36. Overall Product Evaluation

The Allen-Bradley MPL-B4560F-MJ72AA is a high-performance 3000 rpm low-inertia servo motor intended for medium-to-high torque industrial motion applications.

Its key specification set can be summarized as:

130 mm frame + 152.4 mm stack + 3000 rpm + 14.1 N·m continuous torque + 34.4 N·m peak torque + 3.2 kW output + multi-turn absolute feedback + keyed shaft + no brake.

This combination makes it particularly suitable for machines that need more torque than the B4530F and B4540F motors can provide while still requiring the compact architecture and responsive characteristics of the MPL low-inertia family.

The absence of an integrated brake makes the MJ72AA configuration particularly suitable for horizontal axes and other applications where a motor holding brake is not required.

Where a holding brake is needed, the MPL-B4560F-MJ74AA provides a closely related alternative.

Where a keyless shaft is preferred, the MPL-B4560F-MK72AA provides another direct alternative.

For applications requiring lower torque, the B4540F and B4530F configurations can reduce motor size and weight.

For applications requiring substantially more torque, the B540K family provides a larger motor class.

Overall, the MPL-B4560F-MJ72AA is a strong choice for industrial servo applications requiring higher continuous torque, high peak torque, multi-turn absolute positioning, keyed mechanical integration and fast dynamic response in a 3000 rpm motor package.