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Allen-Bradley MPL-B580J-SK72AA Servo Motor

1. Product Overview

The Allen-Bradley MPL-B580J-SK72AA 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 where fast acceleration, accurate positioning, stable speed regulation, and repeatable machine operation are important.

This model uses a 460 V AC / 480 V AC class electrical configuration, a 165 mm frame size, and a 203.2 mm magnet stack length. It belongs to the higher-speed J configuration, with a rated speed of approximately 3750 RPM.

The motor uses a single-turn high-resolution absolute encoder for feedback. The encoder configuration is associated with 1024 Sin/Cos feedback using the Hiperface protocol, providing the servo drive with detailed position and speed information.

A major feature of this particular model is its keyless shaft extension. Compared with a keyed shaft, the keyless configuration can provide a clean mechanical interface for suitable clamping or hub-style coupling arrangements.

The MPL-B580J-SK72AA is also a no-brake configuration. This makes it particularly suitable for machines where the servo drive and mechanical system do not require an integrated holding brake.

The motor uses a SpeedTEC DIN right-angle connector with a rotatable connector arrangement, helping improve cable routing in machines where installation space around the motor is limited.

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2. Brand and Series

Parameter	Description
Brand	Allen-Bradley
Product Family	MP-Series
Servo Motor Series	MPL Low-Inertia Brushless Servo Motors
Product Type	AC Rotary Servo Motor
Motor Construction	Brushless permanent-magnet servo motor
Motor Configuration	Low-inertia
Model	MPL-B580J-SK72AA
Voltage Class	400/460 V AC class
Nominal Voltage	460 V AC class
Frame Size	165 mm
Magnet Stack Length	203.2 mm
Speed Class	3750 RPM
Feedback	Single-turn high-resolution absolute encoder
Shaft	Keyless shaft extension
Brake	No brake
Connector	SpeedTEC DIN, right-angle
Connector Orientation	180° rotatable
Mounting	IEC metric flange mounting
Mounting Holes	Free mounting holes, Type FF

The MPL family is designed around low-inertia servo motor technology. The combination of relatively low rotor inertia and high-speed operation allows the motor to respond quickly to command changes.

The B580J configuration represents a relatively large motor frame and long magnet-stack arrangement within the MPL family. It is therefore suitable for applications that require considerably more mechanical output capability than small-frame servo motors.

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3. Detailed Technical Parameters

3.1 Main Electrical and Performance Parameters

Parameter	Specification
Model	MPL-B580J-SK72AA
Motor Type	Brushless AC rotary servo motor
Voltage Class	400/460 V AC
Armature Voltage Class	460 V AC
Rated Speed	Approximately 3750 RPM
Maximum Speed Class	Approximately 3800 RPM
Motor Series	MPL Low-Inertia
Frame Size	165 mm
Magnet Stack Length	203.2 mm
Feedback Type	Single-turn absolute high-resolution encoder
Feedback Resolution	1024 Sin/Cos class
Feedback Protocol	Hiperface-compatible configuration
Shaft Configuration	Keyless shaft
Shaft Key	No
Shaft Seal	Standard configuration without shaft seal
Brake	No integrated brake
Connector	SpeedTEC DIN
Connector Style	Right-angle
Connector Rotation	180° rotatable
Mounting Standard	IEC metric
Mounting Type	Flange mount
Enclosure Class	IP50 class in standard configuration
Weight	Approximately 6.6 kg
Dimensions	165 mm frame; 203.2 mm magnet-stack length; overall envelope depends on mechanical mounting configuration

The most important performance characteristic of this motor is its combination of large frame size, long magnet stack, low inertia, and high operating speed.

The 203.2 mm magnet stack gives the motor a substantial active electromagnetic length, while the 165 mm frame provides the physical structure needed for this class of servo motor.

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4. Dimensions and Weight

Because servo motor dimensions can be described in several ways, it is useful to distinguish the frame dimension, magnet-stack length, and the complete mechanical envelope.

Dimension / Physical Parameter	Specification
Model	MPL-B580J-SK72AA
Frame Size	165 mm
Frame Diameter Class	165 mm
Magnet Stack Length	203.2 mm
Mounting Standard	IEC metric
Mounting Style	Flange mount
Shaft Type	Keyless
Connector Position	Right-angle connector
Connector Rotation	180°
Overall Motor Length	Depends on the mechanical drawing and connector configuration
Weight	Approximately 6.6 kg

For machine design, the 165 mm frame size and 203.2 mm magnet-stack length are particularly important.

The overall physical length should not be estimated simply by adding the frame size and magnet-stack length, because the actual motor housing, flange, shaft extension, rear cover, and connector arrangement contribute to the complete envelope.

For a final mechanical installation, the machine designer should therefore allow sufficient clearance around the front shaft, rear motor section, and right-angle connector.

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5. Model Number Interpretation

The model number MPL-B580J-SK72AA contains useful configuration information.

Model Code	General Meaning
MPL	MPL low-inertia servo motor family
B580	Frame / motor size configuration
J	High-speed motor configuration, approximately 3750 RPM class
S	Single-turn high-resolution absolute encoder
K	Keyless shaft
72	No integrated brake
AA	Standard configuration designation

The exact model code is especially useful when selecting replacement motors because two motors that appear very similar externally can have different shaft, feedback, brake, connector, or speed configurations.

For this reason, MPL-B580J-SK72AA should not be replaced only on the basis of frame size. The complete catalog number should be compared before installation.

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6. Product Introduction

The MPL-B580J-SK72AA is designed for demanding industrial motion applications that require controlled rotary motion rather than simple fixed-speed motor operation.

A conventional motor can provide continuous rotation, but a servo motor is designed to work as part of a closed-loop motion system. The motor receives commands from the servo drive, while the feedback device continuously provides information about motor position and movement.

This allows the system to control:

• Position
• Speed
• Acceleration
• Deceleration
• Direction
• Synchronization
• Repetitive motion
• Torque response

The MPL-B580J-SK72AA is particularly suited to machines where high-speed movement and accurate repeatability are more important than simple motor starting and stopping.

The low-inertia design is another important feature. Lower rotor inertia allows the motor to change speed more quickly when the drive changes its command.

This can be valuable in machines with frequent indexing cycles, rapid reciprocating motion, or repeated acceleration and deceleration.

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7. Low-Inertia Design

The MPL series is built around a low-inertia motor concept.

In a servo application, rotor inertia directly influences how easily the motor can accelerate and decelerate.

A lower-inertia rotor generally requires less energy to change its rotational speed. When properly matched with the load and tuned correctly, this can result in:

• Faster acceleration
• Faster deceleration
• Reduced response delay
• Improved positioning response
• Better performance during rapid indexing
• Improved tracking of changing motion commands

The advantage becomes particularly noticeable in applications where the motor is repeatedly changing speed.

For example, a packaging machine may accelerate a mechanism, move it to a specific position, decelerate, stop, and then immediately begin another cycle.

A low-inertia servo motor can be advantageous in this type of operating pattern.

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8. High-Speed Performance

The MPL-B580J-SK72AA is a J-series configuration with a rated speed of approximately 3750 RPM.

This high-speed characteristic makes it suitable for machinery where short cycle times and fast rotary movement are important.

Typical benefits include:

• Shorter machine cycles
• Faster indexing
• Rapid acceleration
• Faster return movement
• Higher machine throughput
• Reduced idle movement time

High-speed operation must still be considered together with the actual mechanical load.

The motor, servo drive, gearbox, coupling, pulley, belt, screw, and driven mechanism should all be selected as one system.

A high-speed motor does not automatically mean that the machine should always operate at its maximum speed.

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9. Feedback System

The MPL-B580J-SK72AA uses a single-turn high-resolution absolute encoder.

Feedback Parameter	Specification
Model	MPL-B580J-SK72AA
Feedback Type	Absolute encoder
Feedback Configuration	Single-turn
Resolution Class	1024 Sin/Cos
Protocol Class	Hiperface
Function	Position and speed feedback
Application	Closed-loop servo control
Main Benefit	Accurate motion monitoring and repeatable positioning

The feedback device is one of the most important parts of the servo motor.

During operation, the servo drive uses feedback information to determine how the motor is actually moving.

The controller can then compare the actual motor position with the commanded position and continuously adjust the motor current.

This closed-loop operation is what allows the system to achieve much better motion control than a conventional open-loop motor arrangement.

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10. Keyless Shaft Configuration

One of the defining features of the MPL-B580J-SK72AA is its keyless shaft.

Mechanical Feature	Specification
Model	MPL-B580J-SK72AA
Shaft Type	Keyless
Shaft Key	None
Shaft Seal	Standard configuration without shaft seal
Mechanical Interface	Suitable for compatible clamping/coupling systems
Main Benefit	Clean mechanical connection without traditional keyway

A keyless shaft can be useful when the mechanical design uses a suitable clamping hub, precision coupling, or other compatible shaft connection.

The absence of a traditional keyway can simplify certain coupling arrangements and can provide a clean rotational interface.

However, the coupling system must be correctly selected and installed.

The shaft connection should be capable of handling the actual torque, radial load, axial load, acceleration, and operating speed of the machine.

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11. No-Brake Configuration

The SK72AA configuration does not include an integrated motor brake.

Brake Parameter	Specification
Model	MPL-B580J-SK72AA
Integrated Brake	No
Brake Voltage	Not applicable
Brake Type	None
Main Advantage	Simpler motor configuration
Typical Application	Machines where a holding brake is not required

The no-brake design is useful when the driven machine does not require the motor to hold its position mechanically when servo power is removed.

This can reduce motor configuration complexity and avoid the need for brake wiring.

However, if the machine has vertical loads or requires mechanical holding when power is removed, a brake-equipped motor or another suitable mechanical holding system may be more appropriate.

The decision should be based on the actual safety and mechanical requirements of the machine.

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12. SpeedTEC DIN Connector

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

The connector can be rotated through approximately 180 degrees, which provides flexibility during installation.

This is especially useful in compact machines where a straight connector could interfere with:

• Machine guards
• Cable trays
• Structural members
• Gearboxes
• Adjacent motors
• Linear slides
• Cooling equipment

A right-angle connector can also help keep the motor cable closer to the machine structure.

Correct cable routing remains important because servo cables should not be subjected to excessive bending, pulling, twisting, or mechanical stress.

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13. Mounting and Mechanical Installation

The MPL-B580J-SK72AA uses an IEC metric mounting arrangement.

The motor is intended for flange mounting and uses free mounting holes.

During installation, several factors should be considered.

First, the mounting surface should be rigid and properly aligned.

Second, the motor shaft should be accurately aligned with the driven equipment.

Third, the coupling should be suitable for the operating speed.

Fourth, excessive radial or axial shaft loads should be avoided.

Incorrect alignment can cause vibration, coupling wear, bearing loading, and unnecessary mechanical stress.

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14. Environmental Characteristics

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

An optional shaft seal and appropriate environmentally sealed cable connection can be used in configurations requiring increased environmental protection.

The following conditions should be considered when installing the motor:

• Ambient temperature
• Humidity
• Dust
• Oil
• Coolant
• Water exposure
• Mechanical vibration
• Shock
• Cable routing
• Shaft-seal requirements

The motor should not simply be selected based on electrical characteristics. The physical environment is equally important.

For applications involving significant water, coolant, washdown, or contamination, the complete motor configuration and sealing arrangement should be checked before selection.

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15. Main Product Advantages

15.1 High-Speed Operation

With a rated speed around 3750 RPM, the motor is well suited to high-speed motion applications.

This can help reduce cycle times and improve productivity in machines that perform repeated rapid movements.

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15.2 Low-Inertia Response

The low-inertia design allows the motor to respond rapidly to changes in speed commands.

This is particularly valuable for:

• Indexing
• Pick-and-place systems
• Packaging
• Printing
• Converting
• Automated assembly
• Material handling

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15.3 High-Resolution Feedback

The single-turn absolute encoder provides detailed position feedback to the servo control system.

This supports accurate position control and stable speed regulation.

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15.4 Keyless Shaft

The keyless shaft provides a clean mechanical interface for compatible coupling systems.

This can be particularly useful in precision machinery where a clamping-type connection is preferred.

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15.5 Flexible Connector Orientation

The right-angle SpeedTEC DIN connector can be rotated, giving machine designers additional freedom when routing motor cables.

This is a practical advantage in machines with limited installation space.

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15.6 Large 165 mm Frame

The 165 mm frame provides a substantial mechanical platform for industrial applications that require more output capability than smaller servo motors.

It is appropriate for larger machine axes and mechanisms where compact small-frame motors would not provide an adequate mechanical solution.

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15.7 No-Brake Simplicity

For applications that do not require a holding brake, the no-brake configuration keeps the motor arrangement relatively straightforward.

This can simplify wiring and reduce the number of components that need to be controlled.

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16. Typical Applications

Packaging Machinery

The MPL-B580J-SK72AA can be used in packaging machinery where rapid movement and repeatable positioning are important.

Potential applications include:

• Indexing mechanisms
• Film handling
• Cutting systems
• Sealing mechanisms
• Product positioning
• Conveyor synchronization
• Rotary indexing

The motor’s high-speed characteristics can help improve machine cycle time.

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Material Handling

Servo motors are commonly used in material-handling systems where a conveyor or positioning mechanism needs controlled acceleration and deceleration.

The MPL-B580J-SK72AA can be considered for:

• Conveyor axes
• Transfer systems
• Positioning stations
• Automated handling mechanisms
• Feed systems
• Rotary transfer equipment

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Printing and Converting

Printing and converting equipment often requires accurate synchronization between multiple rotating elements.

A high-speed servo motor with high-resolution feedback can be useful for:

• Web handling
• Roller control
• Registration systems
• Feeding mechanisms
• Cutting systems
• Slitting equipment

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Assembly Machinery

Automated assembly machines often require fast and repeatable motion.

Typical uses include:

• Part positioning
• Rotary indexing
• Tool positioning
• Component feeding
• Press mechanisms
• Automated fastening systems

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Machine Tools

Servo motors are frequently used for controlled machine axes.

The MPL-B580J-SK72AA can be considered for applications involving:

• Rotary positioning
• Feed mechanisms
• Automated tool movement
• High-speed positioning axes
• Auxiliary rotary mechanisms

The exact suitability depends on load inertia, required torque, speed, acceleration, and mechanical transmission.

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Automated Production Lines

The motor can also be used in general factory automation where controlled rotary motion is required.

Examples include:

• Automated transfer equipment
• Production indexing
• Inspection machinery
• Sorting systems
• Pick-and-place equipment
• Specialized automation machinery

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17. Typical Servo System Configuration

A typical motion-control system using the MPL-B580J-SK72AA may include:

System Component	Function
Servo Motor	MPL-B580J-SK72AA
Servo Drive	Controls motor current, speed and position
Motion Controller	Generates motion commands
Encoder	Provides motor position feedback
Motor Cable	Supplies power to motor
Feedback Cable	Transfers encoder information
Mechanical Coupling	Connects motor shaft to machine
Gearbox	Optional speed/torque conversion
Load Mechanism	Performs the actual machine movement

The motor should always be selected together with the drive and mechanical load.

A properly matched system provides better dynamic performance and makes servo tuning easier.

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18. Servo Tuning Considerations

The motor itself is only one part of the motion-control system.

Servo performance also depends heavily on:

• Load inertia
• Load-to-motor inertia ratio
• Coupling stiffness
• Gear ratio
• Belt elasticity
• Mechanical backlash
• Friction
• Resonance
• Acceleration profile
• Deceleration profile
• Servo gains

The low-inertia design of the MPL-B580J-SK72AA can provide excellent dynamic response, but the control system must still be tuned correctly.

If gains are set too aggressively, the machine may experience vibration or audible resonance.

If gains are too conservative, the machine may respond more slowly than expected.

Good servo tuning should therefore consider the entire mechanical system rather than only the motor.

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19. Thermal and Mechanical Considerations

Servo motors can experience significantly different thermal conditions depending on how the machine operates.

A motor running at moderate speed with a relatively low load may operate comfortably for long periods.

A motor repeatedly accelerating a heavy load can produce much greater thermal stress even if the average machine speed appears relatively low.

Important factors include:

• Continuous load
• Peak load
• Acceleration frequency
• Deceleration frequency
• Duty cycle
• Ambient temperature
• Motor mounting
• Heat dissipation
• Load inertia

The motor should therefore be evaluated using the actual machine motion profile rather than relying only on nominal speed.

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20. Five Recommended Related Models

The following models are useful alternatives or comparison points within the same MPL family.

Recommended Model	Feedback / Configuration	Shaft	Brake	Speed Class	Frame	Stack Length	Weight
MPL-B580J-SJ72AA	Single-turn absolute	Keyed	No	3750 RPM	165 mm	203.2 mm	Configuration-dependent
MPL-B580J-SK72AA	Single-turn absolute	Keyless	No	3750 RPM	165 mm	203.2 mm	Approx. 6.6 kg
MPL-B580J-SK74AA	Single-turn absolute	Keyless	24 V DC	3750 RPM	165 mm	203.2 mm	Configuration-dependent
MPL-B580J-SJ74AA	Single-turn absolute	Keyed	24 V DC	3750 RPM	165 mm	203.2 mm	Approx. 40.9 kg class*
MPL-B580F-SJ74AA	Single-turn absolute	Keyed	24 V DC	3000 RPM class	165 mm	152.4 mm	Configuration-dependent

*Weight can vary depending on the exact construction and catalog configuration; confirm the mechanical drawing and product identification before using a weight value for shipping or machine design.

Among these models, the closest mechanical comparison to the MPL-B580J-SK72AA is the MPL-B580J-SJ72AA.

The primary difference is the shaft configuration: the SK version uses a keyless shaft, while the SJ version uses a keyed shaft.

The MPL-B580J-SK74AA is another particularly useful comparison because it retains the keyless shaft but adds an integrated 24 V DC brake.

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21. Comparison of Key Related Models

Model	Speed	Encoder	Shaft	Brake	Frame	Magnet Stack	Application Character
MPL-B580J-SK72AA	3750 RPM	Single-turn absolute	Keyless	No	165 mm	203.2 mm	High-speed, keyless, no-brake
MPL-B580J-SJ72AA	3750 RPM	Single-turn absolute	Keyed	No	165 mm	203.2 mm	High-speed, keyed, no-brake
MPL-B580J-SK74AA	3750 RPM	Single-turn absolute	Keyless	24 V DC	165 mm	203.2 mm	High-speed, keyless, brake
MPL-B580J-SJ74AA	3750 RPM	Single-turn absolute	Keyed	24 V DC	165 mm	203.2 mm	High-speed, keyed, brake
MPL-B580F-SJ74AA	3000 RPM	Single-turn absolute	Keyed	24 V DC	165 mm	152.4 mm	Lower-speed alternative

This comparison makes the selection logic easier.

If the machine requires a keyless shaft and does not need a brake, the MPL-B580J-SK72AA is the direct choice.

If the machine requires a keyed shaft, the MPL-B580J-SJ72AA becomes a natural alternative.

If the machine requires a holding brake, the SK74AA or SJ74AA configurations should be considered.

If the required speed is lower and the application benefits from a shorter magnet-stack configuration, a B580F model can be considered.

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22. Five Popular Allen-Bradley Models for Comparison

The following five models are useful models to consider when comparing servo motor configurations within the same overall product family.

Popular Model	Series / Family	Feedback	Shaft	Brake	Speed Class	Frame / Stack	Weight
MPL-B580J-SK72AA	MPL Low-Inertia	Single-turn absolute	Keyless	No	3750 RPM	165 / 203.2 mm	Approx. 6.6 kg
MPL-B580J-SJ72AA	MPL Low-Inertia	Single-turn absolute	Keyed	No	3750 RPM	165 / 203.2 mm	Configuration-dependent
MPL-B580J-SK74AA	MPL Low-Inertia	Single-turn absolute	Keyless	24 V DC	3750 RPM	165 / 203.2 mm	Configuration-dependent
MPL-B560F-SJ74AA	MPL Low-Inertia	Single-turn absolute	Keyed	24 V DC	3000 RPM	165 / 152.4 mm	Configuration-dependent
MPL-B560F-SK74AA	MPL Low-Inertia	Single-turn absolute	Keyless	24 V DC	3000 RPM	165 / 152.4 mm	Configuration-dependent

These models cover several of the most important selection variables:

• Motor speed
• Frame size
• Magnet-stack length
• Feedback type
• Shaft configuration
• Brake configuration

This makes them useful starting points when selecting a replacement or comparing different machine configurations.

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23. B580J Versus B580F

One of the most useful comparisons is between the B580J and B580F configurations.

Parameter	B580J Configuration	B580F Configuration
Frame Size	165 mm	165 mm
Magnet Stack	203.2 mm	152.4 mm
Speed Class	Approximately 3750 RPM	Approximately 3000 RPM
General Character	Higher-speed	Lower-speed
Typical Advantage	Fast dynamic movement	More moderate speed operation
Application Direction	High-speed machine axes	General servo motion

The two configurations share the same basic frame size, but their magnet-stack lengths and speed characteristics are different.

The B580J is more appropriate when high-speed operation is an important part of the machine design.

The B580F can be more appropriate when approximately 3000 RPM operation is sufficient and the shorter stack configuration fits the application better.

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24. Keyless Shaft Versus Keyed Shaft

The shaft configuration is another important selection point.

Feature	Keyless Shaft	Keyed Shaft
Example	MPL-B580J-SK72AA	MPL-B580J-SJ72AA
Keyway	No	Yes
Typical Coupling	Clamping / compatible hub	Keyed coupling / compatible hub
Mechanical Assembly	Depends on clamping system	Conventional keyed arrangement
Selection Priority	Precision clamping applications	Traditional keyed mechanical transmission

Neither configuration is universally better.

The correct choice depends on the coupling and mechanical transmission used by the machine.

A keyless motor should not be substituted directly for a keyed motor unless the mechanical interface has been designed for the change.

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25. Brake Versus No Brake

The 72 and 74 configurations are useful for understanding the brake selection.

Configuration	Brake	Example
72	No integrated brake	MPL-B580J-SK72AA
74	24 V DC brake	MPL-B580J-SK74AA

A brake-equipped motor can be useful for applications where the load must be held after servo power is removed.

Typical examples may include:

• Vertical axes
• Lifting mechanisms
• Certain positioning systems
• Machines requiring mechanical holding

For horizontal applications where the load is mechanically stable without motor holding torque, a no-brake motor may be preferable.

The brake should not be treated as a substitute for a complete machine safety system.

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26. Advantages in Practical Machine Design

The MPL-B580J-SK72AA offers a useful combination of characteristics:

High speed: Approximately 3750 RPM operation supports fast machine cycles.

Low inertia: Helps the motor respond rapidly to changing speed and position commands.

Absolute feedback: Provides detailed position feedback for closed-loop motion control.

Keyless shaft: Offers a clean mechanical interface for compatible coupling systems.

No brake: Suitable for machines that do not require an integrated holding brake.

Right-angle connector: Helps with cable routing in compact installations.

Rotatable connector: Provides additional flexibility when positioning the motor cable.

165 mm frame: Suitable for relatively large industrial machine axes.

203.2 mm magnet stack: Provides a substantial active motor configuration for demanding servo applications.

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27. Maintenance Considerations

Although servo motors generally require less routine maintenance than many mechanical components, the motor should still be inspected as part of the machine’s preventive-maintenance program.

Important inspection points include:

• Motor mounting bolts
• Shaft coupling
• Cable condition
• Connector condition
• Mechanical vibration
• Abnormal noise
• Bearing condition
• Motor temperature
• Encoder feedback stability
• Mechanical alignment

The connector should be kept clean and properly secured.

Servo cables should be routed so that they are not continuously subjected to sharp bending or excessive mechanical stress.

If unusual vibration develops, the machine should be inspected rather than assuming the motor itself is defective.

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28. Replacement Selection Guide

When replacing an existing servo motor, the safest approach is to compare the complete catalog number.

The following parameters should be checked:

Selection Item	Required Check
Motor Series	MPL
Frame Size	165 mm
Stack Length	203.2 mm
Voltage	460 V AC class
Speed	3750 RPM class
Feedback	Single-turn absolute
Shaft	Keyless
Brake	No brake
Connector	SpeedTEC DIN right-angle
Mounting	IEC metric
Machine Clearance	Confirm physical envelope
Cable Routing	Confirm connector orientation
Load	Confirm torque and inertia requirements

A motor that has the same frame size but a different feedback system or shaft configuration should not automatically be treated as a direct replacement.

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29. Why the MPL-B580J-SK72AA Is a Strong Choice

The MPL-B580J-SK72AA is a strong choice when the machine requires a combination of high speed, low-inertia response, absolute feedback, and a keyless shaft.

Its configuration is particularly attractive when the machine already has a suitable mechanical coupling system and does not require an integrated holding brake.

The 165 mm frame and 203.2 mm magnet stack provide a substantial motor configuration, while the J-series speed rating supports high-speed motion.

For automated machinery where rapid movement, repeatability, and controlled acceleration are important, this combination can provide a very practical servo solution.

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30. Quick Reference Specification Table

Parameter	MPL-B580J-SK72AA
Brand	Allen-Bradley
Series	MP-Series MPL Low-Inertia Servo Motors
Model	MPL-B580J-SK72AA
Motor Type	Brushless AC rotary servo motor
Voltage Class	400/460 V AC
Rated Speed	Approximately 3750 RPM
Maximum Speed Class	Approximately 3800 RPM
Frame Size	165 mm
Magnet Stack Length	203.2 mm
Feedback	Single-turn high-resolution absolute encoder
Feedback Resolution Class	1024 Sin/Cos
Feedback Protocol	Hiperface class
Shaft	Keyless
Shaft Key	None
Shaft Seal	Standard configuration without shaft seal
Brake	No brake
Connector	SpeedTEC DIN
Connector Type	Right-angle
Connector Rotation	180° rotatable
Mounting	IEC metric
Mounting Type	Flange mount
Enclosure	IP50 class standard configuration
Dimensions	165 mm frame; 203.2 mm magnet stack; overall envelope according to mechanical configuration
Weight	Approximately 6.6 kg
Application Type	Industrial servo motion
Main Strength	High-speed, low-inertia precision motion

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31. Final Product Assessment

The Allen-Bradley MPL-B580J-SK72AA is a high-speed, low-inertia industrial servo motor designed for precision rotary motion.

Its combination of a 165 mm frame, 203.2 mm magnet stack, approximately 3750 RPM rated speed, single-turn high-resolution absolute feedback, keyless shaft, no integrated brake, and flexible right-angle DIN connector makes it a versatile option for demanding automation machinery.

The motor is particularly well suited to applications where rapid acceleration and deceleration are important and where the mechanical system does not require an integrated motor holding brake.

The keyless shaft configuration makes it different from keyed versions in the same family, so the coupling and machine interface should be checked carefully before selection.

For machines requiring the same general motor size but a keyed shaft, the MPL-B580J-SJ72AA is a logical comparison.

For machines requiring a keyless shaft with an integrated brake, the MPL-B580J-SK74AA is a more appropriate configuration to evaluate.

For applications where approximately 3000 RPM is sufficient, the MPL-B580F family provides another useful direction for comparison.

Overall, the MPL-B580J-SK72AA is best viewed as a high-speed, low-inertia, absolute-feedback servo motor for demanding industrial motion applications, particularly where fast response, repeatable positioning, and flexible mechanical integration are important.