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Allen-Bradley MPL-B4560F-MK74AA Low-Inertia Servo Motor – Technical Specifications, Applications, Advantages and Model Selection Guide

1. Product Overview

The Allen-Bradley MPL-B4560F-MK74AA is a high-performance low-inertia brushless AC rotary 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, fast acceleration and deceleration, stable speed control, high repeatability, and reliable torque performance.

The MPL-B4560F-MK74AA uses a 460 V AC class power configuration, a 130 mm frame, and a 152.4 mm magnet stack. The motor is designed for the 3000 rpm speed class and provides approximately 14.1 N·m continuous torque and 34.4 N·m peak torque.

A particularly important feature of this model is the combination of a keyless shaft, multi-turn high-resolution absolute encoder, and 24 V DC holding brake.

This configuration makes the motor well suited to machinery that requires a precision mechanical coupling without a conventional shaft key, while also requiring a holding brake for applications such as vertical positioning, indexing, or controlled machine shutdown.

The motor uses a right-angle SpeedTEC DIN connector, which can be rotated approximately 180 degrees. This gives machine designers additional flexibility when routing motor cables in compact equipment.

The MPL-B4560F-MK74AA is therefore a practical choice for packaging machinery, automated assembly systems, material handling equipment, machine tools, printing and converting equipment, precision positioning systems, and general industrial automation.

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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-MK74AA
Product Type	AC brushless rotary servo motor
Motor Construction	Permanent-magnet low-inertia 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
Feedback	Multi-turn high-resolution absolute encoder
Shaft Configuration	Keyless shaft extension
Brake	24 V DC holding brake
Connector	SpeedTEC DIN
Connector Type	Right-angle
Connector Rotation	Approximately 180°
Mounting	IEC metric flange mounting
Mounting Holes	Free mounting holes, Type FF
Product Application	Industrial precision motion control

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3. Detailed Technical Parameters

Parameter	Specification
Model	MPL-B4560F-MK74AA
Brand	Allen-Bradley
Series	MP-Series MPL
Motor Type	Low-inertia brushless AC servo motor
Motor Principle	Permanent-magnet synchronous servo motor
Voltage	460 V AC class
Supply Class	480 V AC class
Rated Speed	3000 rpm
Speed Class	3000 rpm
Continuous Torque	14.1 N·m
Peak Torque	34.4 N·m
Rated Output Power	Approx. 3.2 kW
Rotor Inertia	Approx. 0.00078 kg·m²
Frame Size	130 mm
Frame Designation	45
Magnet Stack Length	152.4 mm
Magnet Stack	6.0 in. class
Feedback	Multi-turn high-resolution absolute encoder
Feedback Resolution	1024 Sin/Cos cycles/rev class
Feedback Protocol	Hiperface-type
Shaft	Keyless shaft extension
Shaft Key	None
Shaft Seal	Standard configuration without shaft seal
Brake	24 V DC holding brake
Connector	SpeedTEC DIN
Connector Configuration	Right-angle
Connector Rotation	180° rotatable
Mounting	IEC metric
Mounting Flange	Metric flange
Mounting Hole Type	Free mounting holes, Type FF
Standard Protection	IP50 class
Higher Environmental Protection	IP66-class configuration possible with appropriate sealing arrangement
Approx. Weight	9.07 kg
Approx. Overall Dimensions	Approx. 305 × 229 × 255 mm class
Operating Temperature	Approx. 0 to 40 °C under standard conditions
Application Category	Industrial servo motion control

The 9.07 kg value should be treated as an approximate motor weight rather than a universal shipping weight. Actual packaged weight can be higher, and physical weight can vary with configuration and accessories.

The overall dimensions shown above are intended as preliminary machine-layout values. Final mechanical installation should always be based on the dimensional drawing for the exact motor configuration.

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4. Model Number Explanation

The model number MPL-B4560F-MK74AA contains several configuration identifiers.

Model Code	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, 180° rotatable
4	24 V DC holding brake
AA	Standard configuration designation

The K in the model number identifies the keyless shaft configuration.

The M identifies the multi-turn high-resolution absolute feedback configuration.

The 7 identifies the right-angle SpeedTEC DIN connector configuration.

The 4 identifies the integrated 24 V DC brake.

This makes the MPL-B4560F-MK74AA particularly easy to distinguish from the closely related MPL-B4560F-MJ74AA, which uses a keyed shaft rather than a keyless shaft.

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5. Product Introduction

The MPL-B4560F-MK74AA is a medium-to-high-performance servo motor intended for automated machinery requiring controlled rotary motion.

The motor combines a 130 mm frame with a 152.4 mm magnet stack, giving it considerably more torque capacity than shorter-stack motors in the same general MPL family.

With approximately 14.1 N·m continuous torque and 34.4 N·m peak torque, the motor can handle both sustained mechanical loads and short-duration dynamic torque requirements.

The 3000 rpm speed class provides a practical balance between torque and rotational speed.

The low-inertia rotor design is particularly useful in machines where rapid acceleration, deceleration, and repeated direction changes are required.

The integrated 24 V DC holding brake adds another important capability.

For example, the brake can be useful on vertical axes where the load must remain mechanically held when servo power is removed.

The keyless shaft is another major feature of this particular model.

Instead of using a traditional shaft key, the motor is designed for mechanical systems that use an appropriate clamping coupling or other keyless transmission method.

This can be beneficial in applications where precise coupling alignment and concentricity are important.

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6. Low-Inertia Servo Motor Design

The MPL series is designed around low-inertia servo technology.

Low rotor inertia allows the motor to change speed quickly when the servo drive commands a new motion profile.

This is especially important in machinery that performs repeated positioning cycles.

Typical motion profiles may involve:

1. Rapid acceleration.
2. High-speed travel.
3. Controlled deceleration.
4. Precise positioning.
5. Short settling time.
6. Immediate movement to the next position.

A motor with low rotor inertia can reduce the amount of torque required to accelerate its own rotor.

This allows more of the available motor torque to be used for the actual machine load.

The result can be a responsive servo axis with good dynamic characteristics when the motor, drive, and mechanical load are correctly matched.

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7. Continuous Torque Performance

The MPL-B4560F-MK74AA provides approximately 14.1 N·m of continuous torque.

Continuous torque is the primary parameter used to evaluate the motor’s ability to sustain a mechanical load during normal operation.

For a machine with a continuous rotating load, the calculated RMS torque should be compared with the motor’s continuous torque capability.

Applications that can make use of this torque level include:

• Conveyor drive axes
• Rotary indexing tables
• Packaging mechanisms
• Feed systems
• Automated assembly stations
• Material handling axes
• Machine tool feed mechanisms
• Rotary positioning equipment

The motor should not be operated continuously at its peak torque rating.

Peak torque is intended for short-duration dynamic operation, while continuous torque is the more important parameter for sustained loading.

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8. Peak Torque Capability

The motor provides approximately 34.4 N·m peak torque.

This gives the motor significant short-duration torque capacity above its 14.1 N·m continuous rating.

Peak torque is particularly useful during:

• Rapid acceleration
• Rapid deceleration
• Direction reversal
• High-inertia load movement
• Short indexing cycles
• Position correction
• Sudden load changes

A machine may require only 8 to 12 N·m during normal movement but require substantially more torque for a short period when accelerating a heavy mechanism.

The peak torque capability provides additional margin for these dynamic conditions.

The actual allowable peak duration depends on the motor, servo drive, operating conditions, duty cycle, and thermal state.

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9. 3.2 kW Power Class

The MPL-B4560F-MK74AA is commonly treated as a 3.2 kW-class servo motor.

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

The combination of 3.2 kW class output, 3000 rpm speed, and 14.1 N·m continuous torque gives the motor a useful balance for general factory automation.

It can be used where a smaller 2.1 kW or 2.6 kW motor may be approaching its torque limit, while a larger 5.4 kW motor would be unnecessarily large for the application.

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10. 3000 rpm Speed Rating

The motor is designed for the 3000 rpm speed class.

A 3000 rpm servo motor is commonly used for applications requiring both moderate-to-high rotational speed and substantial torque.

The motor can be connected to the machine directly or through a mechanical transmission.

Typical transmission arrangements include:

• Precision couplings
• Gearboxes
• Planetary gearboxes
• Timing belts
• Ball screws
• Rack-and-pinion systems
• Roller drives
• Rotary tables

The correct transmission ratio should be selected according to the required load speed, load torque, motor speed, and machine inertia.

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11. Multi-Turn Absolute Encoder

The MPL-B4560F-MK74AA uses a multi-turn high-resolution absolute encoder.

This is an important feature for precision industrial motion.

The encoder provides position information to the servo system and supports accurate control of motor position and speed.

The multi-turn function is especially useful when the motor shaft rotates through multiple revolutions.

Applications where this feature can be valuable include:

• Rotary positioning
• Indexing tables
• Packaging systems
• Automated assembly
• Machine tools
• Precision material handling
• Electronic manufacturing equipment
• Multi-axis coordinated motion

The high-resolution feedback also helps the drive detect small changes in shaft position.

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12. Hiperface-Type Feedback

The feedback system is based on a high-resolution absolute encoder configuration associated with the Hiperface protocol.

This type of feedback is designed for closed-loop servo control.

Accurate feedback allows the servo drive to continuously compare commanded movement with actual motor movement.

The drive can then adjust current and motor torque to reduce positioning error and maintain the desired motion profile.

For high-performance servo systems, the quality of feedback is just as important as the motor’s torque rating.

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13. Keyless Shaft Design

The keyless shaft is one of the most distinctive characteristics of the MPL-B4560F-MK74AA.

Unlike a keyed motor shaft, the keyless configuration does not rely on a traditional parallel key to transmit torque between the motor shaft and coupling.

Instead, the machine normally uses a suitable clamping or locking connection.

This arrangement can offer several advantages.

A properly selected clamping coupling can provide good concentricity between the motor shaft and the driven component.

It can also simplify mechanical alignment in precision applications.

The absence of a shaft key can reduce the possibility of key-related backlash or mechanical looseness when the correct coupling system is used.

The coupling must, however, be correctly sized for:

• Motor torque
• Peak torque
• Motor speed
• Radial load
• Axial load
• Shaft diameter
• Coupling stiffness
• Machine acceleration

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14. Integrated 24 V DC Holding Brake

The MPL-B4560F-MK74AA includes a 24 V DC holding brake.

The brake is especially useful when the motor must hold its shaft in position after the servo drive removes motor torque.

This can be important for:

• Vertical axes
• Lifting mechanisms
• Z-axis machines
• Material handling equipment
• Positioning systems
• Indexing mechanisms
• Safety-related holding functions

The brake should normally be considered a holding device rather than a substitute for normal servo-controlled deceleration.

The machine control system should coordinate brake release and engagement correctly.

For vertical applications, the brake and mechanical load must be evaluated as part of the complete safety and motion-control design.

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15. SpeedTEC DIN Connector

The motor uses a SpeedTEC DIN right-angle connector.

The connector is designed to provide a practical industrial connection for motor and feedback cabling.

The connector can be rotated approximately 180 degrees.

This is useful when the motor is installed in a confined machine compartment.

The connector orientation can be adjusted to help avoid interference with:

• Machine frames
• Protective covers
• Gearboxes
• Cable carriers
• Adjacent servo motors
• Linear slides
• Electrical components

This flexibility can make machine assembly and cable routing easier.

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16. Mechanical Dimensions

The motor uses a 130 mm frame and 152.4 mm magnet stack.

The 152.4 mm stack corresponds to approximately 6 inches.

The 130 mm frame provides a relatively compact mounting envelope for a motor capable of producing approximately 14.1 N·m continuous torque.

For preliminary machine design, an approximate envelope of 305 × 229 × 255 mm can be used as a planning reference.

The exact mechanical drawing should be used before finalizing mounting plates, guards, couplings, cable clearances, or other close-tolerance mechanical components.

Mechanical Parameter	Specification
Model	MPL-B4560F-MK74AA
Frame Size	130 mm
Frame Designation	45
Magnet Stack	152.4 mm
Magnet Stack	6.0 in. class
Shaft Type	Keyless
Shaft Key	None
Shaft Seal	Standard configuration without shaft seal
Brake	24 V DC holding brake
Mounting	IEC metric
Flange Mounting	Yes
Mounting Hole Type	Free mounting holes, Type FF
Connector	SpeedTEC DIN
Connector Style	Right-angle
Connector Rotation	Approximately 180°
Approx. Length	305 mm class
Approx. Width	229 mm class
Approx. Height / Diameter Envelope	255 mm class
Approx. Weight	9.07 kg

The approximately 9.07 kg motor weight should be regarded as a reference value.

Actual shipping weight, packaged weight, and configuration-specific weight may differ.

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17. Environmental Characteristics

The MPL-B4560F-MK74AA is intended for industrial environments.

The standard configuration is generally associated with an IP50-class enclosure arrangement.

Higher environmental protection can be achieved with appropriate sealing and cable arrangements where the application requires greater resistance to dust or moisture.

Typical applications should consider:

• Ambient temperature
• Machine enclosure temperature
• Cooling conditions
• Dust exposure
• Oil exposure
• Coolant exposure
• Humidity
• Washdown requirements
• Cable sealing
• Shaft sealing

If the motor is installed in a wet or contaminated environment, the motor’s exact sealing configuration should be matched to the machine environment.

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18. Main Product Advantages

18.1 High Torque Capacity

The 14.1 N·m continuous torque rating provides substantial output from a 130 mm frame.

This allows the motor to handle loads that would be too demanding for smaller MPL configurations.

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18.2 Strong Peak Torque

The approximately 34.4 N·m peak torque rating gives the motor useful dynamic capacity.

This is valuable for high-acceleration applications and machines with relatively high reflected load inertia.

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18.3 Low-Inertia Rotor

The low-inertia rotor helps the servo axis respond quickly to motion commands.

This is particularly useful for machines with short cycle times.

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18.4 Multi-Turn Absolute Feedback

The absolute multi-turn encoder provides detailed position feedback and is suitable for precision positioning applications.

It is particularly useful when the machine axis can rotate through multiple turns.

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18.5 Keyless Shaft

The keyless shaft is ideal for machines using precision clamping couplings.

It can provide a clean mechanical interface and good concentricity when the correct coupling is used.

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18.6 Integrated 24 V Brake

The 24 V DC brake provides a convenient shaft-holding function.

This makes the motor particularly useful for vertical positioning and other applications where the shaft must remain stationary after servo power is removed.

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18.7 Flexible Connector Orientation

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

This makes cable routing more flexible and can simplify installation in compact machines.

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18.8 Compact 130 mm Frame

The motor provides relatively high torque in a 130 mm frame.

This can help machine designers avoid moving to a significantly larger motor frame when additional torque is required.

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19. Typical Applications

Packaging Machinery

The MPL-B4560F-MK74AA can be used in packaging machinery for controlled feeding, indexing, cutting, positioning, and synchronized movement.

Typical applications include:

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

The low-inertia design is particularly useful where rapid indexing and short machine cycle times are required.

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Material Handling Equipment

The motor can be used for servo-controlled material movement.

Typical applications include:

• Transfer systems
• Conveyor positioning
• Sorting mechanisms
• Rotary transfer systems
• Automated feeders
• Positioning axes

The integrated brake is an advantage when the motor is used on an axis that needs mechanical holding.

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Automated Assembly

Automated assembly machinery often requires accurate positioning and repeatable motion.

The MPL-B4560F-MK74AA can be used for:

• Rotary indexing tables
• Assembly stations
• Component positioning
• Automated tooling
• Transfer mechanisms
• Inspection stations
• Precision feeders

The absolute feedback system supports accurate repeatability across repeated production cycles.

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Machine Tools

The motor can be applied to selected machine tool servo axes.

Possible applications include:

• Feed axes
• Auxiliary rotary axes
• Tool positioning
• Automatic workpiece positioning
• Material feeding
• Automated fixtures

The actual motor selection should be based on cutting forces, axis inertia, acceleration requirements, and the machine’s complete duty cycle.

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Printing and Converting Equipment

Printing and converting machinery often requires coordinated movement between multiple axes.

The motor can be used for:

• Feed rollers
• Registration mechanisms
• Cutting systems
• Positioning mechanisms
• Material transport
• Rotary indexing

The high-resolution feedback is useful where synchronization and repeatability are important.

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Electronics Manufacturing

Electronic manufacturing equipment often requires precise, repeatable motion.

The MPL-B4560F-MK74AA can be used in:

• Automated assembly
• Component positioning
• Inspection systems
• Precision transport
• Indexing equipment
• Production automation

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Automotive Manufacturing

Automotive manufacturing systems use servo motors for positioning, handling, transfer, assembly, and automated tooling.

The 3.2 kW-class B4560F motor provides a useful solution for medium-power axes where a compact but high-performance servo motor is required.

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20. Applications Benefiting From the Keyless Shaft

The keyless shaft configuration is particularly useful for machines that use precision clamping couplings.

Typical applications include:

• Precision rotary tables
• Servo gearboxes
• High-speed rollers
• Ball screw drives
• Direct-coupled rotary mechanisms
• Packaging machines
• Precision indexing systems
• Automated assembly equipment

The keyless connection can simplify precision coupling arrangements when correctly engineered.

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21. Applications Benefiting From the Holding Brake

The integrated 24 V DC brake is especially valuable for vertical or gravity-loaded mechanisms.

Typical applications include:

• Vertical lifting axes
• Z-axis positioning
• Automated elevators
• Vertical material handling
• Robotic positioning systems
• Lifting platforms
• Vertical assembly equipment
• Gravity-loaded tooling

The brake should not be treated as the only safety measure in applications where uncontrolled movement could create a hazard.

The complete machine safety system should determine the appropriate holding and stopping method.

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22. Electrical Integration

The MPL-B4560F-MK74AA is intended for use with a compatible servo drive and motion-control system.

The servo drive must support the motor’s voltage class, current requirements, feedback system, speed range, and brake configuration.

Important electrical parameters include:

• Motor voltage
• Continuous current
• Peak current
• Feedback type
• Encoder compatibility
• Brake voltage
• Brake current
• Servo cable configuration
• Grounding requirements
• Machine safety requirements

The encoder wiring is particularly important because the absolute feedback signal is required for accurate closed-loop control.

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23. Servo Drive Matching

Correct servo drive selection is essential.

The drive should have sufficient current capacity to supply the motor’s continuous and peak operating requirements.

The drive should also support the motor’s absolute encoder feedback configuration.

For applications involving rapid acceleration, the drive must be capable of delivering the required peak current without reaching its protection limits.

For vertical applications, brake control should be coordinated between the drive and machine control system.

The drive configuration should also be checked for:

• Motor identification
• Feedback type
• Encoder resolution
• Motor direction
• Brake timing
• Current limits
• Speed limits
• Acceleration limits
• Deceleration limits
• Fault handling

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24. Servo Tuning

The low-inertia construction of the motor allows fast response, but proper servo tuning remains important.

The motor and mechanical load should be considered as one complete dynamic system.

Important tuning factors include:

• Motor inertia
• Load inertia
• Reflected inertia
• Gear ratio
• Coupling stiffness
• Mechanical resonance
• Belt compliance
• Ball screw characteristics
• Position gain
• Velocity gain
• Acceleration rate
• Deceleration rate
• Settling time

If the servo gain is set excessively high, mechanical resonance or vibration may occur.

If the gain is too low, the machine may respond slowly and exhibit excessive settling time.

Correct tuning allows the motor’s low-inertia characteristics to be used effectively.

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25. Thermal Considerations

The motor’s continuous torque rating must be evaluated against the actual machine duty cycle.

A machine that continuously operates at high torque can generate considerably more heat than a machine that uses high torque only for short acceleration periods.

The following factors should be considered:

• RMS torque
• Average speed
• Peak torque
• Acceleration frequency
• Deceleration frequency
• Ambient temperature
• Machine enclosure
• Mounting arrangement
• Cooling conditions
• Mechanical transmission efficiency
• Duty cycle

The motor should therefore be selected based on the complete motion profile rather than the maximum instantaneous torque alone.

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26. Mechanical Installation

The motor should be mounted on a rigid machine structure.

The mounting flange should be correctly aligned with the machine’s mounting surface.

The keyless shaft should be connected using an appropriately rated coupling.

The coupling must be selected according to:

• Shaft diameter
• Motor torque
• Peak torque
• Operating speed
• Radial load
• Axial load
• Coupling stiffness
• Alignment requirements

Incorrect alignment can lead to excessive bearing loads and mechanical vibration.

The motor connector should also have sufficient clearance for installation and cable movement.

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27. Keyless Shaft Versus Keyed Shaft

The keyless configuration is useful where a precision clamping connection is preferred.

A keyed shaft is often more convenient when the machine already uses standard keyed couplings.

The choice should therefore be based on the machine’s mechanical design rather than simply on motor performance.

Mechanical Requirement	Preferred Configuration
Conventional keyed coupling	MPL-B4560F-MJ74AA
Precision clamping coupling	MPL-B4560F-MK74AA
Keyless coupling + brake	MPL-B4560F-MK74AA
Keyless coupling + no brake	MPL-B4560F-MK72AA
Keyed coupling + no brake	MPL-B4560F-MJ72AA

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28. Recommended Five Same-Series or Closely Related Models

The following models are useful alternatives when comparing the MPL-B4560F-MK74AA with other configurations in the same family.

Model	Voltage	Frame / Stack	Speed	Continuous Torque	Peak Torque	Power	Feedback	Shaft	Brake	Approx. Weight
MPL-B4560F-MK72AA	460 V AC	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	Approx. 3.2 kW	Multi-turn absolute	Keyless	No	Approx. 9.1 kg
MPL-B4560F-MJ74AA	460 V AC	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	Approx. 3.2 kW	Multi-turn absolute	Keyed	24 V DC	Approx. 11.8 kg
MPL-B4560F-MJ72AA	460 V AC	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	Approx. 3.2 kW	Multi-turn absolute	Keyed	No	Approx. 6.8–12 kg
MPL-B4560F-SK72AA	460 V AC	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	Approx. 3.2 kW	Single-turn high-resolution	Keyless	No	Approx. 7–12 kg
MPL-B4560F-SJ74AA	460 V AC	130 / 152.4 mm	3000 rpm	14.1 N·m	34.4 N·m	Approx. 3.2 kW	Single-turn high-resolution	Keyed	24 V DC	Approx. 7–12 kg

The MPL-B4560F-MK72AA is the closest alternative when the brake is not required.

The MPL-B4560F-MJ74AA provides essentially the same general performance but uses a keyed shaft.

The MPL-B4560F-MJ72AA combines a keyed shaft with no integrated brake.

The MPL-B4560F-SK72AA is useful when a single-turn high-resolution encoder configuration is preferred.

The MPL-B4560F-SJ74AA combines a keyed shaft, single-turn high-resolution feedback, and a 24 V DC brake.

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29. Five Popular Allen-Bradley Models for Broader Comparison

Model	Series	Speed	Continuous Torque	Peak Torque	Power	Frame / Stack	Feedback	Shaft	Brake	Approx. Weight
MPL-B430P-MJ74AA	MP-Series MPL	5000 rpm	Approx. 6.55 N·m	Approx. 19.8 N·m	Approx. 2.2 kW	115 mm class	Absolute encoder	Keyed	24 V DC	Approx. 5.5 kg
MPL-B4530F-MJ74AA	MP-Series MPL	3000 rpm	Approx. 8.25 N·m	Approx. 20.3 N·m	Approx. 2.1 kW	130 / 76.2 mm	Multi-turn absolute	Keyed	24 V DC	Approx. 7–9.5 kg
MPL-B4540F-MJ74AA	MP-Series MPL	3000 rpm	Approx. 10.2 N·m	Approx. 27.1 N·m	Approx. 2.6 kW	130 / 101.6 mm	Multi-turn absolute	Keyed	24 V DC	Approx. 8.6 kg
MPL-B4560F-MJ74AA	MP-Series MPL	3000 rpm	Approx. 14.1 N·m	Approx. 34.4 N·m	Approx. 3.2 kW	130 / 152.4 mm	Multi-turn absolute	Keyed	24 V DC	Approx. 11.8 kg
MPL-B540K-MJ74AA	MP-Series MPL	4000 rpm	Approx. 19.4 N·m	Approx. 48.6 N·m	Approx. 5.4 kW	165 mm class	Multi-turn absolute	Keyed	24 V DC	Approx. 15 kg

The MPL-B430P-MJ74AA is more suitable when the machine prioritizes high rotational speed and a smaller motor package.

The MPL-B4530F-MJ74AA is a practical choice for moderate 3000 rpm applications.

The MPL-B4540F-MJ74AA provides a higher torque level while maintaining the general 130 mm frame class.

The MPL-B4560F-MJ74AA moves further upward in torque and power and is a close performance reference for the requested model.

The MPL-B540K-MJ74AA is a larger and more powerful alternative for demanding applications requiring approximately 19.4 N·m continuous torque and 4000 rpm operation.

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30. Direct Comparison of the B4560F Configurations

Parameter	MPL-B4560F-MK72AA	MPL-B4560F-MK74AA	MPL-B4560F-MJ72AA	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	Approx. 3.2 kW	Approx. 3.2 kW	Approx. 3.2 kW	Approx. 3.2 kW
Feedback	Multi-turn absolute	Multi-turn absolute	Multi-turn absolute	Multi-turn absolute
Shaft	Keyless	Keyless	Keyed	Keyed
Brake	No	24 V DC	No	24 V DC
Connector	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN	SpeedTEC DIN
Connector	Right-angle, rotatable	Right-angle, rotatable	Right-angle, rotatable	Right-angle, rotatable
Approx. Weight	9.07 kg class	9.07 kg class	6.8–12 kg class	11.8 kg class

The main difference between these four configurations is not the fundamental torque or speed rating.

The main differences are the shaft configuration and brake configuration.

This makes model selection much easier when the machine’s mechanical interface has already been defined.

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31. Selection Guide by Machine Requirement

Machine Requirement	Recommended Model
3000 rpm, keyless shaft, no brake	MPL-B4560F-MK72AA
3000 rpm, keyless shaft, 24 V brake	MPL-B4560F-MK74AA
3000 rpm, keyed shaft, no brake	MPL-B4560F-MJ72AA
3000 rpm, keyed shaft, 24 V brake	MPL-B4560F-MJ74AA
3000 rpm, single-turn encoder, keyless shaft	MPL-B4560F-SK72AA
3000 rpm, single-turn encoder, keyed shaft + brake	MPL-B4560F-SJ74AA
Lower torque requirement	MPL-B4540F family
Higher torque requirement	MPL-B540K family
Higher speed requirement	MPL-B430P / B540K family
Vertical axis requiring integrated holding brake	MPL-B4560F-MK74AA

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32. Advantages for Machine Builders

The MPL-B4560F-MK74AA provides several practical advantages during machine design.

The 130 mm frame allows a relatively high torque output without moving immediately to a larger motor frame.

The 152.4 mm stack provides approximately 14.1 N·m continuous torque and 34.4 N·m peak torque.

The low-inertia construction supports rapid acceleration and deceleration.

The multi-turn absolute encoder provides accurate position feedback.

The keyless shaft is well suited to precision clamping couplings.

The 24 V DC brake provides a convenient holding function for applications that require mechanical retention.

The right-angle SpeedTEC DIN connector helps simplify cable routing.

The overall combination makes the motor suitable for a broad range of automated industrial machinery.

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33. Why Choose the MPL-B4560F-MK74AA?

The MPL-B4560F-MK74AA is particularly attractive when the machine requires all of the following:

• 460 V AC class operation
• 3000 rpm speed
• Approximately 3.2 kW power
• 14.1 N·m continuous torque
• 34.4 N·m peak torque
• 130 mm frame
• 152.4 mm stack
• Multi-turn absolute feedback
• Keyless shaft
• Integrated 24 V DC brake
• Right-angle SpeedTEC DIN connector
• 180° connector rotation
• Low-inertia servo construction

This combination is difficult to replace with a smaller motor when both torque and brake requirements are significant.

At the same time, moving to a much larger motor may be unnecessary if the machine’s calculated RMS torque remains within the B4560F capability.

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34. Important Motor Selection Considerations

Before selecting the MPL-B4560F-MK74AA for a new machine or replacement project, several parameters should be checked.

Continuous Torque

The calculated RMS torque should remain within the motor’s continuous capability.

Peak Torque

The machine’s maximum acceleration and deceleration torque should be compared with the applicable peak torque capability.

Load Inertia

The load inertia should be evaluated against the motor inertia and servo drive tuning requirements.

Speed

The required machine speed should be compared with the 3000 rpm motor speed class.

Shaft Configuration

The machine must be designed for a keyless motor shaft.

Brake

The machine must determine whether the 24 V DC brake is required for holding or safety functions.

Feedback

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

Mechanical Envelope

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

Connector Clearance

The right-angle connector requires sufficient clearance for both connector installation and cable bending.

Thermal Conditions

Ambient temperature and machine enclosure conditions should be considered during final sizing.

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35. Typical Machine Design Applications

The MPL-B4560F-MK74AA can be considered for the following machine categories.

Machine Category	Typical Servo Function
Packaging Machine	Feeding, indexing, cutting, positioning
Cartoning Machine	Product transfer and positioning
Material Handling	Conveyor positioning and transfer
Assembly Machine	Rotary indexing and component positioning
Machine Tool	Feed axis and auxiliary motion
Printing Machine	Roller synchronization and positioning
Converting Machine	Feeding, cutting, tension-related motion
Electronics Equipment	Precision positioning and indexing
Automotive Equipment	Assembly, transfer and positioning
Inspection Equipment	Precision positioning and scanning
Rotary Table	Indexing and positioning
Vertical Handling	Lift or Z-axis motion with holding brake

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36. Maintenance Considerations

Correct installation and routine inspection are important for maintaining servo motor performance.

The motor should be inspected for abnormal vibration, unusual noise, excessive temperature, connector damage, cable wear, and mechanical coupling problems.

The keyless coupling should be checked periodically for correct mechanical condition.

The holding brake should also be checked as part of the machine’s maintenance program.

If the machine operates in a contaminated environment, the motor sealing arrangement should be inspected regularly.

Cable routing should prevent excessive bending, tension, or mechanical stress at the motor connector.

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37. Brake Maintenance

Because the MPL-B4560F-MK74AA includes a 24 V DC holding brake, the brake should be considered during preventive maintenance.

Important checks include:

• Brake release operation
• Brake engagement operation
• Brake wiring
• Brake voltage
• Mechanical holding capability
• Abnormal brake noise
• Brake wear
• Machine stopping behavior

A brake problem can be particularly important on a vertical axis because loss of holding capability can allow an unsupported load to move.

The brake should therefore be incorporated into the machine’s inspection and safety procedures.

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38. Cable Routing and Connector Installation

The right-angle connector provides good installation flexibility, but the cable should still be routed carefully.

The cable should not be subjected to excessive bending or tension.

A suitable cable routing path should be maintained between the motor and control cabinet.

Where cable carriers are used, the cable should be installed according to the applicable minimum bend radius and carrier requirements.

A well-designed cable route can reduce connector stress and improve long-term reliability.

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39. Overall Technical Position Within the MPL Family

The MPL-B4560F-MK74AA sits in a relatively high-performance position within the 130 mm-frame 3000 rpm MPL group.

The B4530F family provides approximately 8.25 N·m continuous torque.

The B4540F family provides approximately 10.2 N·m continuous torque.

The B4560F family increases this to approximately 14.1 N·m continuous torque.

This gives the B4560F family a clear role for applications that require more torque while still maintaining the 130 mm frame format.

The B540K family then provides another step upward in both torque and power for more demanding applications.

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40. Key Specifications at a Glance

Key Item	MPL-B4560F-MK74AA
Brand	Allen-Bradley
Series	MP-Series MPL
Product Family	Low-Inertia Brushless Servo Motors
Motor Type	AC brushless rotary servo motor
Voltage Class	460 V AC
Speed	3000 rpm
Continuous Torque	14.1 N·m
Peak Torque	34.4 N·m
Rated Power	Approx. 3.2 kW
Frame	130 mm
Magnet Stack	152.4 mm
Feedback	Multi-turn high-resolution absolute
Encoder	1024 Sin/Cos class, Hiperface-type
Shaft	Keyless
Shaft Key	None
Brake	24 V DC holding brake
Connector	SpeedTEC DIN
Connector Style	Right-angle
Connector Rotation	180°
Mounting	IEC metric
Mounting Hole	Free mounting holes, Type FF
Rotor Inertia	Approx. 0.00078 kg·m²
Standard Protection	IP50 class
Approx. Dimensions	305 × 229 × 255 mm class
Approx. Weight	9.07 kg
Main Application	Precision industrial motion control

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41. Product Advantages Summary

The main advantages of the MPL-B4560F-MK74AA can be summarized as follows.

High torque: approximately 14.1 N·m continuous torque provides substantial output for a 130 mm frame.

High peak torque: approximately 34.4 N·m peak torque supports rapid acceleration and dynamic machine cycles.

Low inertia: the low-inertia rotor supports fast changes in speed and position.

Absolute feedback: the multi-turn encoder provides accurate position information for precision motion.

Keyless shaft: suitable for precision clamping couplings and keyless mechanical transmission systems.

Integrated brake: the 24 V DC brake provides useful holding capability, particularly for vertical axes.

Flexible connector: the right-angle connector can be rotated approximately 180 degrees for easier cable routing.

Industrial mounting: IEC metric mounting and a 130 mm frame provide a practical mechanical interface for automated machinery.

Broad application range: the motor can be used in packaging, material handling, assembly, machine tools, printing, converting, electronics manufacturing, and general factory automation.

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42. Overall Product Evaluation

The Allen-Bradley MPL-B4560F-MK74AA is a strong industrial servo motor configuration for applications requiring high dynamic response, accurate absolute feedback, substantial torque, a keyless shaft, and an integrated holding brake.

Its 14.1 N·m continuous torque and 34.4 N·m peak torque provide useful capacity for medium-to-high demand servo axes.

The 3.2 kW-class output and 3000 rpm speed rating provide a practical balance between power and operating speed.

The 130 mm frame and 152.4 mm magnet stack give the motor a relatively compact physical format while maintaining substantial torque capability.

The multi-turn high-resolution absolute encoder makes the motor suitable for precision positioning and coordinated motion applications.

The keyless shaft makes this particular configuration especially attractive where the machine uses a clamping coupling or another precision keyless mechanical interface.

The integrated 24 V DC holding brake further expands the motor’s application range, particularly for vertical axes, lifting mechanisms, and machines where shaft holding is required after servo torque is removed.

The right-angle, rotatable SpeedTEC DIN connector also improves machine integration by providing additional flexibility for cable routing.

Overall, the MPL-B4560F-MK74AA is a well-balanced choice within the MPL low-inertia servo family when a machine requires approximately 3.2 kW of servo power, 3000 rpm operation, 14.1 N·m continuous torque, multi-turn absolute feedback, a keyless shaft, and a 24 V DC holding brake.

For final engineering selection, the motor should be matched to the actual load inertia, RMS torque, peak torque, acceleration and deceleration profile, duty cycle, ambient temperature, mechanical coupling, servo drive, brake requirements, installation space, and machine safety system.