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Allen-Bradley MPL-B4560F-MK72AA Low-Inertia Servo Motor – Technical Specifications, Applications, Advantages and Model Selection Guide

1. Product Overview

The Allen-Bradley MPL-B4560F-MK72AA is a high-performance low-inertia AC brushless servo motor belonging to the MP-Series MPL Low-Inertia Servo Motor family.

This model is designed for industrial motion-control systems that require accurate positioning, stable speed regulation, rapid acceleration and deceleration, high repeatability, and reliable torque output.

The MPL-B4560F-MK72AA uses a 460 V AC class power configuration, a 130 mm frame, and a 152.4 mm magnet stack length. It is rated for 3000 rpm, with approximately 14.1 N·m continuous stall torque, 34.4 N·m peak torque, and approximately 3.2 kW rated output.

A key feature of this particular configuration is its keyless shaft extension. Unlike keyed versions of the same motor family, the MK72AA configuration is intended for mechanical systems using a keyless coupling or clamping-type shaft connection.

The motor also uses a multi-turn high-resolution absolute encoder, a SpeedTEC DIN right-angle connector, and no integrated brake.

This combination makes the MPL-B4560F-MK72AA well suited to high-speed positioning axes, packaging machinery, material handling systems, automated assembly equipment, machine tools, printing and converting equipment, and other industrial automation applications where dynamic servo response is important.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Series	MP-Series MPL
Product Family	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B4560F-MK72AA
Motor Type	Low-inertia AC brushless rotary servo motor
Voltage Class	460 V AC
Frame Size	130 mm
Frame Designation	Frame 45
Magnet Stack Length	152.4 mm
Speed Class	3000 rpm
Rated Output	Approx. 3.2 kW
Continuous Stall Torque	14.1 N·m
Peak Stall Torque	34.4 N·m
Feedback	Multi-turn high-resolution absolute encoder
Shaft Configuration	Keyless shaft extension
Brake	No integrated brake
Connector	SpeedTEC DIN
Connector Configuration	Right-angle, 180° rotatable
Mounting	IEC metric flange mount
Mounting Holes	Free mounting holes, Type FF
Product Type	Rotary servo motor

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3. Detailed Technical Parameters

Parameter	Specification
Model	MPL-B4560F-MK72AA
Brand	Allen-Bradley
Series	MP-Series MPL
Motor Construction	Low-inertia brushless AC servo motor
Voltage	460 V AC class
Voltage Class	400/460 V AC family
Rated Speed	3000 rpm
Maximum Speed	3000 rpm class
Rated Output Power	3.2 kW
Continuous Stall Torque	14.1 N·m
Peak Stall Torque	34.4 N·m
Continuous Stall Current	Approx. 11.8 A
Peak Stall Current	Approx. 36.0 A
Rotor Inertia	Approx. 0.00078 kg·m²
Frame Size	130 mm
Frame Designation	45
Magnet Stack Length	152.4 mm
Feedback	Multi-turn high-resolution absolute encoder
Feedback Resolution	1024 Sin/Cos cycles/rev class
Feedback Type	Absolute multi-turn
Feedback Technology	Hiperface-type encoder
Shaft	Keyless shaft extension
Shaft Key	None
Shaft Seal	Standard configuration without shaft seal
Brake	No brake
Connector	SpeedTEC DIN
Connector Orientation	Right-angle
Connector Rotation	180° rotatable
Mounting	IEC metric flange mounting
Mounting Hole Type	Free mounting holes, Type FF
Standard Protection	IP50 class
Higher Protection	IP66 possible with appropriate shaft sealing and environmentally sealed cable configuration
Operating Temperature	Approx. 0 to 40 °C
Approx. Motor Weight	11.82 kg
Approx. Overall Envelope	Approx. 305 × 229 × 255 mm class
Application	Industrial precision motion control

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4. Model Number Explanation

The model number MPL-B4560F-MK72AA identifies the main configuration of the motor.

Model Code	Configuration Meaning
MPL	MPL low-inertia servo motor family
B	460 V AC class
45	130 mm frame size
60	152.4 mm magnet stack length
F	3000 rpm speed class
M	Multi-turn high-resolution absolute encoder
K	Keyless shaft extension
7	SpeedTEC DIN right-angle connector, rotatable
2	No integrated brake
AA	Standard configuration designation

The K in the model number is particularly important because it distinguishes this motor from keyed-shaft configurations.

The 2 identifies the no-brake configuration, making the MPL-B4560F-MK72AA different from models such as the MPL-B4560F-MK74AA, which incorporates a 24 V DC brake.

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5. Product Introduction

The MPL-B4560F-MK72AA is designed for applications where fast and precise rotary motion is required but an integrated motor brake is not necessary.

Its low-inertia rotor construction allows the motor to respond rapidly to servo commands.

This is especially useful for machines that frequently accelerate, decelerate, reverse direction, or move between multiple programmed positions.

The 130 mm frame combined with a 152.4 mm magnet stack gives this motor a relatively high torque capacity within the MPL family.

With approximately 14.1 N·m continuous torque, 34.4 N·m peak torque, and 3.2 kW rated output, the motor provides a useful balance between physical size and mechanical performance.

The keyless shaft is particularly advantageous when the machine uses a precision clamping coupling or other keyless mechanical transmission method.

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6. Low-Inertia Servo Construction

Low rotor inertia is one of the defining characteristics of the MPL series.

A low-inertia rotor can respond quickly to changes in commanded velocity and position.

When the motor is properly matched to the load, this allows the servo system to achieve fast acceleration and deceleration without requiring excessive motor torque simply to overcome rotor inertia.

This characteristic is valuable in:

• High-speed indexing systems
• Packaging machines
• Pick-and-place systems
• Electronic assembly equipment
• Automated inspection systems
• Printing and converting machinery
• Material handling equipment
• Precision feed mechanisms
• Rotary positioning systems

The actual dynamic performance still depends on the complete mechanical system, including load inertia, transmission ratio, coupling stiffness, and servo tuning.

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7. Continuous Torque – 14.1 N·m

The MPL-B4560F-MK72AA provides approximately 14.1 N·m of continuous stall torque.

Continuous torque is an important selection parameter for determining whether the motor can handle the sustained load of a machine axis.

For applications involving long-duration movement, continuous conveyor operation, repeated positioning, rotary feeding, or constant mechanical resistance, the calculated RMS torque should be compared against the motor’s continuous torque capability.

The 14.1 N·m rating places the B4560F configuration above shorter-stack MPL models such as the B4530F and B4540F.

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8. Peak Torque – 34.4 N·m

The motor provides approximately 34.4 N·m peak stall torque.

Peak torque is available for short-duration dynamic conditions such as:

• Rapid acceleration
• Rapid deceleration
• High-inertia load movement
• Sudden changes in mechanical resistance
• Short positioning cycles
• Dynamic indexing
• Reversal of direction

The relationship between continuous and peak torque gives the motor useful dynamic capability while maintaining a relatively compact frame.

Peak torque should not be treated as a continuous operating rating. The actual allowable peak duration and duty cycle depend on the motor, drive, operating conditions, and application profile.

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9. 3.2 kW Rated Output

The MPL-B4560F-MK72AA has a rated output of approximately 3.2 kW.

This output level makes the motor suitable for medium-power industrial servo applications.

The combination of 3.2 kW output and 3000 rpm operation makes the motor particularly useful for mechanisms that require both speed and torque.

Typical examples include:

• Rotary positioning systems
• High-speed feeders
• Packaging axes
• Machine tool feed axes
• Conveyor indexing
• Automated assembly mechanisms
• Printing equipment
• Material transfer systems

The motor should always be selected based on the actual mechanical load rather than output power alone.

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10. 3000 rpm Operating Speed

The motor is designed for the 3000 rpm speed class.

A 3000 rpm servo motor is a practical choice for many industrial machines because it provides a good balance between rotational speed and torque.

The motor can be connected directly to a rotary load or used with a gearbox, timing belt, ball screw, planetary gearbox, or other transmission mechanism.

In a linear axis, for example, the motor may drive a ball screw through a coupling.

In a rotary machine, it may drive a gearbox or direct mechanical coupling.

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11. Multi-Turn Absolute Encoder

The MPL-B4560F-MK72AA uses a multi-turn high-resolution absolute encoder.

This feedback system provides the servo drive with detailed information about the motor’s position.

The multi-turn capability is useful when the motor shaft rotates through multiple revolutions and the control system needs accurate positional information across the complete operating range.

The high-resolution feedback also supports precise speed and position control.

Typical benefits include:

• Accurate positioning
• Stable speed regulation
• Improved repeatability
• Precise acceleration and deceleration
• Better synchronization between multiple axes
• Improved response to motion commands

For automated machinery, this can help maintain consistent cycle performance from one production sequence to the next.

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12. Keyless Shaft Extension

The most distinctive mechanical feature of the MPL-B4560F-MK72AA is the keyless shaft extension.

A keyless shaft connection is often used with precision clamping couplings, shrink-disc systems, locking assemblies, or other mechanical connections that do not rely on a conventional shaft key.

This configuration can provide several practical benefits.

First, the coupling can be installed without relying on a traditional keyway.

Second, a properly selected clamping connection can provide accurate concentric mounting.

Third, the absence of a keyway can be advantageous where smooth shaft geometry and precise mechanical alignment are important.

The exact coupling must be selected according to shaft diameter, torque, axial loading, radial loading, speed, and the mechanical requirements of the machine.

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13. No Integrated Brake

The MPL-B4560F-MK72AA is a no-brake configuration.

This means that the motor does not include the 24 V DC holding brake found on some related MPL models.

This configuration is advantageous when:

• The machine does not require shaft holding after power removal.
• The axis is horizontal.
• A separate mechanical brake is already installed.
• The machine uses an external safety braking system.
• Reduced motor weight or simplified motor construction is preferred.
• The application does not require holding torque when servo power is disconnected.

For vertical axes, the absence of a brake must be carefully evaluated because the motor may not be able to hold the load safely after servo power is removed.

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14. SpeedTEC DIN Connector

The motor uses a SpeedTEC DIN connector in a right-angle configuration.

The connector can be rotated approximately 180 degrees.

This design provides additional flexibility when installing the motor inside compact equipment.

Cable routing is often one of the more difficult aspects of servo motor installation, especially when the motor is mounted close to:

• Machine frames
• Protective guards
• Gearboxes
• Cable carriers
• Linear slides
• Other motors
• Electrical cabinets

The rotatable connector allows the installer to select a more suitable cable direction without changing the fundamental motor configuration.

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15. Mechanical Dimensions

The MPL-B4560F-MK72AA uses a 130 mm frame and a 152.4 mm magnet stack.

The 130 mm frame is equivalent to approximately 5.12 inches, while the 152.4 mm stack corresponds to approximately 6 inches.

The motor is intended for metric IEC-style flange mounting.

For machine layout purposes, an overall envelope in the approximate range of 305 × 229 × 255 mm can be used as a preliminary planning reference.

Final machine design should use the actual dimensional drawing for the exact motor configuration, especially where clearances are tight.

Mechanical Parameter	Specification
Model	MPL-B4560F-MK72AA
Frame Size	130 mm
Frame Designation	45
Magnet Stack Length	152.4 mm
Stack Length	6.0 in class
Shaft Configuration	Keyless
Shaft Key	None
Shaft Seal	Standard configuration without shaft seal
Brake	None
Mounting	IEC metric flange
Mounting Hole Type	Free mounting holes, Type FF
Connector	SpeedTEC DIN
Connector Style	Right-angle
Connector Rotation	180°
Approx. Overall Length	Approx. 305 mm
Approx. Overall Width	Approx. 229 mm
Approx. Overall Height / Diameter Envelope	Approx. 255 mm class
Approx. Weight	11.82 kg

The weight of approximately 11.82 kg is the practical reference value for the motor body. Actual packaged weight can be higher and may vary with accessories and shipping configuration.

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16. Environmental and Protection Characteristics

The MPL series is intended for industrial environments.

The standard motor configuration is generally associated with an IP50 minimum protection level without shaft sealing.

With the appropriate shaft seal and environmentally sealed cable connection, higher protection levels can be achieved for applications requiring improved resistance to dust and moisture.

Typical operating temperature is approximately 0 to 40 °C for standard application conditions.

The motor should be installed in accordance with the actual environmental requirements of the machine.

Where the motor is exposed to:

• Coolant
• Oil
• Dust
• Washdown
• Moisture
• Abrasive particles
• High ambient temperatures

the appropriate sealing, cable, and mounting configuration should be selected.

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17. Main Product Advantages

17.1 High Torque in a 130 mm Frame

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

This offers a useful combination of compact mechanical dimensions and substantial servo output.

It can reduce the need to move to a larger frame when the application requires more torque than smaller MPL motors can provide.

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17.2 Low-Inertia Dynamic Response

The low-inertia design allows rapid changes in speed and position.

This is particularly valuable in machines with frequent indexing, rapid reciprocation, or repeated acceleration and deceleration.

When correctly tuned, the motor can contribute to shorter machine cycle times and more responsive motion.

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17.3 Multi-Turn Absolute Feedback

The multi-turn absolute encoder provides accurate feedback over multiple shaft revolutions.

This makes the motor suitable for sophisticated positioning applications where accurate axis position is important.

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17.4 Keyless Mechanical Interface

The keyless shaft configuration provides flexibility for machines using clamping-style couplings or other keyless mechanical connections.

This can be particularly useful for high-precision rotary applications where shaft alignment and coupling concentricity are important.

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17.5 No-Brake Configuration

For applications that do not require a holding brake, the no-brake configuration simplifies the motor assembly.

It also makes the motor a useful alternative to the brake-equipped B4560F models.

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17.6 Flexible Connector Orientation

The right-angle SpeedTEC DIN connector can be rotated approximately 180 degrees.

This makes it easier to route servo cables in compact machine layouts.

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17.7 Strong Peak Torque Capability

The approximately 34.4 N·m peak torque rating provides useful acceleration capacity.

This is especially important for machines with relatively high reflected inertia or demanding motion profiles.

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18. Typical Applications

Packaging Equipment

The MPL-B4560F-MK72AA is well suited to packaging machinery requiring precise synchronization and fast movement.

Typical applications include:

• Product feeders
• Indexing systems
• Film transport
• Rotary positioning
• Cutting mechanisms
• Filling equipment
• Cartoning machinery
• High-speed transfer systems

The low-inertia motor construction can be useful where rapid indexing and short cycle times are important.

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Material Handling Systems

The motor can be used for controlled movement in automated material handling systems.

Examples include:

• Transfer mechanisms
• Conveyor indexing
• Rotary transfer units
• Positioning axes
• Automated sorting mechanisms
• Feed systems

The absence of an integrated brake should be considered carefully if the axis is vertical.

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Automated Assembly

Assembly machines frequently require accurate positioning and repeatable motion.

The MPL-B4560F-MK72AA can be used for:

• Assembly indexing
• Rotary tables
• Component positioning
• Pick-and-place mechanisms
• Automated fastening systems
• Inspection stations
• Feeding systems

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Machine Tools

The motor can be used in selected machine-tool applications where precise servo positioning is required.

Possible applications include:

• Feed axes
• Auxiliary rotary axes
• Tool handling
• Automatic positioning
• Material feeding

The motor’s high-resolution absolute feedback is beneficial for precision motion control.

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Printing Machinery

Printing and converting systems often require accurate synchronization between multiple rotating components.

The motor can be used for:

• Roller positioning
• Feed systems
• Registration mechanisms
• Cutter positioning
• Material transport
• Tension-control-related motion axes

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Electronics Manufacturing

Electronic production equipment often requires precise and repeatable positioning.

The MPL-B4560F-MK72AA can be applied to:

• Automated assembly equipment
• Inspection systems
• Component transport
• Indexing stations
• Precision positioning mechanisms
• Semiconductor-related automation equipment

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Automotive Production Equipment

Automotive production machinery uses servo motors extensively for automated positioning, assembly, handling, and transfer.

The 3.2 kW motor class is suitable for a wide range of medium-power servo axes.

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19. Applications Where the No-Brake Configuration Is Particularly Suitable

The no-brake configuration can be advantageous for horizontal axes.

Examples include:

• Horizontal conveyor axes
• Rotary positioning tables
• Horizontal linear stages
• Packaging feed axes
• Printing rollers
• Horizontal transfer mechanisms
• Automated inspection axes
• Machine tool feed mechanisms

If the motor is installed on a vertical load, a separate holding or safety mechanism may be required.

The motor’s servo torque should not automatically be considered a substitute for a mechanically rated holding brake.

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20. Electrical Integration

The MPL-B4560F-MK72AA is a 460 V AC class servo motor intended for use with a compatible servo drive and motion-control system.

The servo drive must be matched to the motor’s electrical and feedback characteristics.

Important selection factors include:

• Motor voltage class
• Continuous current
• Peak current
• Feedback type
• Encoder compatibility
• Rated speed
• Motor power
• Brake configuration
• Cable type
• Machine safety requirements

The multi-turn absolute feedback system must be correctly connected to the servo drive so that the drive can interpret position and velocity information correctly.

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21. Servo Tuning and Dynamic Performance

The low-inertia construction provides a fast response, but proper servo tuning remains essential.

The motor should be evaluated together with the complete mechanical system.

Important factors include:

• Motor inertia
• Load inertia
• Reflected inertia
• Gear ratio
• Coupling stiffness
• Belt stiffness
• Ball screw characteristics
• Mechanical resonance
• Acceleration time
• Deceleration time
• Position-loop gain
• Velocity-loop gain
• Current-loop response

A properly matched system can take full advantage of the motor’s dynamic characteristics.

Poor mechanical design or excessive servo gain can result in vibration, overshoot, noise, or instability.

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22. Thermal Considerations

The 3.2 kW rating should be evaluated against the actual duty cycle.

A machine that repeatedly operates at high torque can generate considerably more heat than a machine that operates at moderate torque with occasional peak loads.

The following factors should be considered:

• RMS torque
• Continuous torque
• Peak torque
• Average speed
• Acceleration frequency
• Ambient temperature
• Mounting orientation
• Machine enclosure
• Cooling conditions
• Gearbox efficiency
• Duty cycle

Motor selection should therefore be based on the complete motion profile rather than only the maximum instantaneous load.

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23. Mechanical Installation

The motor should be mounted to a rigid and properly aligned machine surface.

The flange and mounting hardware must be capable of handling the forces generated by the motor and connected load.

Because this is a keyless-shaft model, the selected coupling must be compatible with the shaft diameter, torque capacity, speed, and mechanical loading.

Incorrect coupling installation can cause:

• Shaft vibration
• Bearing loading
• Coupling slippage
• Excessive noise
• Positioning errors
• Premature bearing wear
• Reduced motor service life

Correct shaft alignment is therefore particularly important.

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24. Keyless Shaft Advantages

The keyless shaft can provide several benefits compared with a traditional keyed shaft.

A properly designed clamping connection can provide a highly concentric mechanical connection.

It can also simplify coupling installation where the machine uses a precision locking assembly.

For applications requiring frequent coupling replacement or very precise shaft alignment, a keyless connection may provide additional flexibility.

However, the coupling must be properly selected and tightened according to the mechanical manufacturer’s specifications.

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25. Comparison With Keyed B4560F Models

Feature	MPL-B4560F-MK72AA	MPL-B4560F-MJ72AA	MPL-B4560F-MK74AA	MPL-B4560F-MJ74AA
Voltage	460 V AC class	460 V AC class	460 V AC class	460 V AC class
Frame	130 mm	130 mm	130 mm	130 mm
Stack	152.4 mm	152.4 mm	152.4 mm	152.4 mm
Speed	3000 rpm	3000 rpm	3000 rpm	3000 rpm
Continuous Torque	14.1 N·m	14.1 N·m	14.1 N·m	14.1 N·m
Peak Torque	34.4 N·m	34.4 N·m	34.4 N·m	34.4 N·m
Power	3.2 kW	3.2 kW	3.2 kW	3.2 kW
Feedback	Multi-turn absolute	Multi-turn absolute	Multi-turn absolute	Multi-turn absolute
Shaft	Keyless	Keyed	Keyless	Keyed
Brake	No brake	No brake	24 V DC	24 V DC
Connector	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN
Approx. Weight	11.82 kg	Approx. 11.82 kg	Approx. 11.8–13 kg	Approx. 11.8 kg

The MPL-B4560F-MK72AA is therefore best viewed as the keyless, no-brake configuration within the B4560F family.

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26. Recommended Five Same-Series or Related Models

The following models provide useful alternatives for applications with similar motion-control requirements.

Model	Voltage	Frame / Stack	Speed	Continuous Torque	Peak Torque	Power	Feedback	Shaft	Brake	Approx. Weight
MPL-B4530F-MJ72AA	460 V AC	130 / 76.2 mm	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	Multi-turn absolute	Keyed	No	Approx. 7–8 kg
MPL-B4540F-MK72AA	460 V AC	130 / 101.6 mm	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	Multi-turn absolute	Keyless	No	Approx. 8–10 kg
MPL-B4560F-MJ72AA	460 V AC	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	Multi-turn absolute	Keyed	No	Approx. 11.82 kg
MPL-B4560F-MK74AA	460 V AC	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 kg class
MPL-B540K-MK72AA	460 V AC	165 mm class	4000 rpm	19.4 N·m	48.6 N·m	5.4 kW	Multi-turn absolute	Keyless	No	Approx. 15 kg class

The MPL-B4530F-MJ72AA is suitable when a lower-power motor is sufficient.

The MPL-B4540F-MK72AA provides an intermediate torque level while retaining the keyless-shaft concept.

The MPL-B4560F-MJ72AA provides nearly the same electrical and performance characteristics as the requested model but uses a keyed shaft.

The MPL-B4560F-MK74AA retains the keyless shaft but adds a 24 V DC brake.

The MPL-B540K-MK72AA is appropriate when a larger frame and substantially higher torque capability are required.

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27. Five Popular Allen-Bradley Models for Broader Comparison

Model	Voltage	Frame / Stack	Speed	Continuous Torque	Peak Torque	Power	Feedback	Shaft	Brake	Approx. Weight
MPL-B4530F-MJ74AA	460 V AC	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. 7–8 kg
MPL-B4540F-MJ74AA	460 V AC	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. 8–9 kg
MPL-B4560F-MJ74AA	460 V AC	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-B520K-MJ74AA	460 V AC	165 mm class	4000 rpm	10.7 N·m	23.2 N·m	3.5 kW	Multi-turn absolute	Keyed	24 V DC	Approx. 9.8–12 kg
MPL-B540K-MJ74AA	460 V AC	165 mm class	4000 rpm	19.4 N·m	48.6 N·m	5.4 kW	Multi-turn absolute	Keyed	24 V DC	Approx. 15 kg class

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

The B4530F is appropriate for lower torque requirements.

The B4540F provides a step up in continuous torque.

The B4560F provides 3.2 kW and 14.1 N·m continuous torque.

The B520K provides a different combination of power and speed in the larger-frame class.

The B540K provides significantly higher torque and power for demanding industrial axes.

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28. Application Selection Guide

Application Requirement	Recommended Model
Compact 2.1 kW servo axis	MPL-B4530F-MJ74AA
Medium 2.6 kW servo application	MPL-B4540F-MJ74AA
3.2 kW keyless, no-brake servo	MPL-B4560F-MK72AA
3.2 kW keyed, no-brake servo	MPL-B4560F-MJ72AA
3.2 kW keyless servo with brake	MPL-B4560F-MK74AA
3.2 kW keyed servo with brake	MPL-B4560F-MJ74AA
Higher-power 4000 rpm application	MPL-B540K-MJ74AA
Vertical axis requiring integrated brake	MPL-B4560F-MK74AA
Horizontal precision axis without brake	MPL-B4560F-MK72AA
Precision axis using keyless coupling	MPL-B4560F-MK72AA

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29. Key Specifications at a Glance

Key Specification	MPL-B4560F-MK72AA
Brand	Allen-Bradley
Series	MP-Series MPL
Motor Type	Low-inertia brushless AC servo motor
Voltage	460 V AC class
Frame Size	130 mm
Magnet Stack	152.4 mm
Rated Speed	3000 rpm
Continuous Torque	14.1 N·m
Peak Torque	34.4 N·m
Rated Power	3.2 kW
Rotor Inertia	Approx. 0.00078 kg·m²
Feedback	Multi-turn high-resolution absolute
Feedback Resolution	1024 Sin/Cos cycles/rev class
Shaft	Keyless
Shaft Key	None
Brake	None
Connector	SpeedTEC DIN
Connector Orientation	Right-angle
Connector Rotation	180°
Mounting	IEC metric
Protection	IP50 minimum standard configuration
Higher Protection	IP66 possible with suitable sealing configuration
Operating Temperature	Approx. 0 to 40 °C
Approx. Weight	11.82 kg
Approx. Dimensions	305 × 229 × 255 mm class
Main Application	Precision industrial motion control

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30. Advantages for Machine Builders

For machine builders, the MPL-B4560F-MK72AA offers a combination of performance and mechanical flexibility.

The 130 mm frame keeps the motor within a relatively compact industrial envelope while the 152.4 mm stack provides 14.1 N·m continuous torque.

The low-inertia rotor is useful for machines that require fast dynamic response.

The multi-turn absolute encoder provides high-resolution position information for precision motion.

The keyless shaft allows the motor to be integrated with clamping-type couplings and other precision mechanical transmission systems.

The absence of an integrated brake can also be an advantage when the machine does not require a motor-mounted holding brake or already has a separate braking mechanism.

The rotatable right-angle connector helps simplify cable routing in compact machine designs.

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31. Why Choose MPL-B4560F-MK72AA?

The MPL-B4560F-MK72AA is a particularly suitable choice when the application requires the following combination:

• 460 V AC class operation
• 3000 rpm rated speed
• Approximately 3.2 kW output
• 14.1 N·m continuous torque
• 34.4 N·m peak torque
• 130 mm frame
• 152.4 mm magnet stack
• Multi-turn absolute feedback
• Keyless shaft
• No integrated brake
• Right-angle SpeedTEC DIN connector
• Rotatable connector orientation
• Low-inertia servo construction

This combination makes the model especially attractive for precision horizontal axes and machines using keyless mechanical couplings.

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32. Important Selection Considerations

Before replacing another servo motor with the MPL-B4560F-MK72AA, the following parameters should be checked carefully.

Motor Power

The machine’s continuous mechanical power requirement should remain within the motor’s rated operating range.

Continuous Torque

The calculated RMS torque should be compared with the 14.1 N·m continuous rating.

Peak Torque

Short-duration acceleration and deceleration torque should remain within the applicable peak torque limits.

Load Inertia

The load inertia should be evaluated against the motor’s rotor inertia and the selected servo drive’s tuning capabilities.

Shaft Configuration

The machine must use a suitable keyless coupling or clamping connection because this motor does not have a conventional shaft key.

Brake Requirement

The motor has no integrated brake.

If the machine includes a vertical axis or requires mechanical holding after power loss, an appropriate external or alternative braking solution must be considered.

Encoder Compatibility

The servo drive must support the motor’s multi-turn high-resolution absolute feedback configuration.

Mechanical Clearance

The 130 mm frame and 152.4 mm stack should be checked against the machine’s available installation space.

Cable Routing

The right-angle connector provides flexibility, but sufficient clearance must still be provided for the connector and servo cable.

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33. Overall Product Evaluation

The Allen-Bradley MPL-B4560F-MK72AA is a high-performance low-inertia servo motor designed for industrial motion applications where precise positioning, fast dynamic response, and substantial torque output are required.

Its 3.2 kW rated output, 14.1 N·m continuous torque, and 34.4 N·m peak torque make it a strong choice for medium-power servo applications.

The 130 mm frame and 152.4 mm magnet stack provide a useful balance between torque capacity and installation size.

The multi-turn high-resolution absolute encoder is well suited to precision motion applications requiring accurate position feedback.

The keyless shaft is the defining mechanical characteristic of this configuration and makes the motor particularly suitable for machines using precision clamping couplings or other keyless transmission components.

The no-brake configuration is appropriate for horizontal axes and applications where a motor-mounted holding brake is not required.

The SpeedTEC DIN right-angle connector, with approximately 180° rotational flexibility, also simplifies machine integration and cable routing.

Overall, the MPL-B4560F-MK72AA is a practical choice for packaging machinery, automated assembly equipment, material handling systems, precision positioning machines, printing and converting equipment, machine tools, electronics manufacturing equipment, and other industrial automation systems requiring a 3000 rpm, 3.2 kW-class low-inertia servo motor.

For final engineering selection, the motor should be evaluated together with the servo drive, load inertia, RMS torque, peak torque, acceleration profile, duty cycle, ambient temperature, mechanical coupling, installation dimensions, feedback requirements, and machine safety system.