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Allen-Bradley MPL-B4530F-SK72AA Servo Motor

1. Product Overview

The Allen-Bradley MPL-B4530F-SK72AA is a low-inertia brushless AC servo motor designed for industrial motion-control applications that require accurate positioning, repeatable movement, fast acceleration and deceleration, and reliable closed-loop feedback.

The motor belongs to the MP-Series MPL Low-Inertia Servo Motor family and is part of the 460 V AC-class motor range.

The MPL-B4530F-SK72AA uses a 130 mm frame, a 76.2 mm magnet stack, a 3000 rpm speed rating, and a single-turn high-resolution encoder.

Its mechanical configuration is particularly distinctive because it combines a keyless shaft extension with no integral brake.

This makes it a useful choice for horizontal servo axes where a traditional keyed shaft is not required and where the machine does not need a built-in holding brake.

The motor provides approximately 8.25 N·m of continuous stall torque, approximately 20.3 N·m of peak torque, and approximately 2.1 kW of rated output power. The motor’s rotor inertia is approximately 0.00040 kg·m², while the listed motor weight is approximately 7.26 kg.

The high-resolution feedback system uses an absolute single-turn encoder with 1024 Sin/Cos cycles per revolution and Hiperface protocol. This gives the servo drive detailed information about the motor’s position and supports accurate closed-loop motion control.

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2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	MP-Series
Servo Series	MPL Low-Inertia Servo Motors
Product Type	Brushless AC Rotary Servo Motor
Motor Technology	Permanent-Magnet Brushless Servo
Voltage Class	400 V AC
Armature Voltage	460 V
Frame Size	Frame 45
Frame Diameter	130 mm
Magnet Stack	76.2 mm
Rated Speed	3000 rpm
Feedback	Single-turn High-resolution Encoder
Feedback Resolution	1024 Sin/Cos cycles per revolution
Feedback Protocol	Hiperface
Shaft Configuration	Keyless Shaft Extension
Brake	No Brake
Connector	SpeedTEC DIN Connector
Connector Style	Right Angle
Connector Rotation	180° Rotatable
Mounting	IEC Metric
Mounting Holes	Free Mounting Holes / Type FF
Shaft Seal	No Shaft Seal
Continuous Stall Torque	8.25 N·m
Peak Torque	20.3 N·m
Rated Output	Approximately 2.1 kW
Rotor Inertia	Approximately 0.00040 kg·m²
Approximate Weight	7.26 kg
Typical Application	Industrial Servo Motion Control

The official product description identifies this configuration as a 460 V motor with a 130 mm frame, 76.2 mm stack, 3000 rpm rating, single-turn high-resolution encoder, keyless shaft extension, SpeedTEC DIN connector, no brake, and IEC metric mounting.

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3. Main Technical Parameters

Parameter	MPL-B4530F-SK72AA Specification
Model	MPL-B4530F-SK72AA
Brand	Allen-Bradley
Series	MP-Series MPL
Series Type	Low-Inertia Servo Motor
Motor Type	Brushless AC Rotary Servo
Voltage Class	400 V AC
Armature Voltage	460 V
Rated Speed	3000 rpm
Maximum Speed	3000 rpm class
Continuous Stall Torque	8.25 N·m
Peak Torque	20.3 N·m
Rated Continuous Output	Approximately 2.1 kW
Frame Size	Frame 45
Frame Diameter	130 mm
Magnet Stack Length	76.2 mm
Feedback	Absolute Single-Turn High-Resolution Encoder
Feedback Resolution	1024 Sin/Cos cycles/revolution
Feedback Protocol	Hiperface
Shaft	Keyless
Shaft Seal	None
Brake	No Brake
Connector	SpeedTEC DIN
Connector Configuration	Right Angle
Connector Rotation	180°
Mounting Standard	IEC Metric
Mounting Holes	Free Mounting Holes / Type FF
Rotor Inertia	Approx. 0.00040 kg·m²
Approximate Weight	7.26 kg
Primary Application	Industrial Motion Control

The 7.26 kg figure corresponds to approximately 16 lb and is specifically listed for the MPL-B4530F-SK72AA configuration.

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4. Dimensions and Mechanical Configuration

The MPL-B4530F-SK72AA has a 130 mm frame size and a 76.2 mm magnet stack.

The 130 mm frame corresponds to the Frame 45 designation.

The 76.2 mm magnet stack corresponds to the “30” portion of the model designation.

These dimensions are important when determining whether the motor can physically replace another motor in an existing machine.

Mechanical Parameter	Specification
Model	MPL-B4530F-SK72AA
Frame Number	45
Frame Size	130 mm
Frame Diameter	130 mm
Magnet Stack Code	30
Magnet Stack Length	76.2 mm
Mounting Type	IEC Metric Flange
Mounting Hole Style	Free Mounting Holes / Type FF
Shaft Configuration	Keyless
Shaft Seal	No
Brake	No
Connector	SpeedTEC DIN
Connector Style	Right Angle
Connector Rotation	180°
Approximate Weight	7.26 kg

The frame and stack dimensions should not be treated as the complete external motor envelope.

For an actual machine replacement, the flange dimensions, shaft extension, connector clearance, mounting-hole pattern, cable bend radius, and machine-side coupling dimensions should also be checked against the applicable mechanical drawing.

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5. Electrical and Performance Characteristics

The MPL-B4530F-SK72AA is a 3000 rpm servo motor with approximately 8.25 N·m continuous stall torque and 20.3 N·m peak torque.

This combination gives the motor a useful balance between speed, continuous torque, and short-duration acceleration capability.

Performance Parameter	Specification
Model	MPL-B4530F-SK72AA
Rated Speed	3000 rpm
Continuous Stall Torque	8.25 N·m
Peak Torque	20.3 N·m
Rated Output	Approx. 2.1 kW
Rotor Inertia	Approx. 0.00040 kg·m²
Voltage Class	400 V AC
Armature Voltage	460 V
Frame Size	130 mm
Magnet Stack	76.2 mm
Feedback	Single-turn High-resolution Encoder
Shaft	Keyless
Brake	No
Weight	Approx. 7.26 kg

The motor family specifications list the MPL-B4530F group at 3000 rpm, 8.25 N·m continuous stall torque, 20.3 N·m peak stall torque, approximately 2.1 kW rated output, approximately 0.00040 kg·m² rotor inertia, and approximately 7.3 kg motor weight. The exact SK72AA configuration is listed at approximately 7.26 kg.

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6. Single-Turn High-Resolution Encoder

One of the most important features of the MPL-B4530F-SK72AA is its single-turn high-resolution encoder.

The encoder is specified as an absolute single-turn encoder using 1024 Sin/Cos cycles per revolution with Hiperface protocol.

This feedback system allows the servo drive to obtain detailed information about the motor’s angular position.

In a closed-loop servo system, the drive uses feedback from the motor to continuously compare the actual motor position and speed against the commanded values.

This allows the control system to regulate:

• Position.
• Speed.
• Acceleration.
• Deceleration.
• Torque response.
• Position settling.
• Repetitive indexing.

The high-resolution feedback is especially useful in machinery where smooth motion and repeatable positioning are important.

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7. Advantages of the High-Resolution Encoder

7.1 Accurate Position Feedback

The encoder provides detailed information about the motor’s angular position.

This helps the servo controller maintain the commanded position accurately.

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7.2 Improved Motion Smoothness

High-resolution feedback can provide the servo control system with more detailed information during low-speed movement and position settling.

This is useful in precision machinery where small position changes need to be detected and corrected.

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7.3 Repeatable Indexing

Machines that repeatedly move to the same positions can benefit from detailed feedback.

Typical examples include:

• Rotary indexing.
• Pick-and-place systems.
• Assembly machines.
• Packaging equipment.
• Positioning tables.
• Material feeding systems.

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7.4 Closed-Loop Speed Control

The encoder also provides information used for speed regulation.

This allows the motor to respond to changing speed commands and load conditions.

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8. Keyless Shaft Configuration

The MPL-B4530F-SK72AA uses a keyless shaft extension.

This is one of the main mechanical characteristics separating it from keyed versions of the same motor family.

A keyless shaft is generally used with a compatible clamping or friction-lock coupling.

Shaft Parameter	MPL-B4530F-SK72AA
Shaft Type	Keyless
Conventional Shaft Key	No
Shaft Seal	No
Coupling Requirement	Compatible keyless coupling
Brake	No
Feedback	High-resolution encoder
Typical Application	Horizontal servo axes

The keyless design can provide greater flexibility when the machine uses a dedicated clamping coupling.

It also avoids the need for a conventional shaft key in the motor-to-coupling interface.

However, the coupling must be correctly selected for the motor torque, speed, shaft geometry, and machine load.

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9. Keyless Shaft Advantages

A keyless shaft can provide several practical benefits.

Flexible Coupling Installation

A suitable friction-lock coupling can provide a clean mechanical connection between the motor and driven machine.

Reduced Dependence on Shaft Keys

The coupling does not rely on a conventional parallel key for torque transmission.

Good Suitability for Servo Applications

When correctly selected, a keyless coupling can provide a secure connection for repeated acceleration and deceleration.

Easy Mechanical Matching

For machinery designed around keyless servo couplings, the SK72AA configuration can be more convenient than a keyed motor.

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10. No Integral Brake

The MPL-B4530F-SK72AA is a no-brake configuration.

This means that the motor does not include an integrated mechanical holding brake.

This configuration is particularly suitable for horizontal applications where the driven load does not need to be mechanically held after servo power is removed.

Typical examples include:

• Horizontal conveyor axes.
• Rotary indexing systems.
• Horizontal positioning systems.
• Packaging machines.
• Assembly machines.
• Material feeding systems.
• Machine-tool auxiliary axes.

For vertical or gravity-loaded axes, a brake-equipped motor should normally be considered unless another suitable mechanical holding system is provided.

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11. Advantages of the No-Brake Configuration

The no-brake configuration can be beneficial when the machine does not require mechanical holding.

It avoids adding a brake to an axis that does not need one.

This can result in:

• Lower motor mass.
• Simpler mechanical construction.
• Fewer brake-related electrical connections.
• Less brake-control complexity.
• Suitable configuration for horizontal servo axes.

The no-brake design should not be considered a disadvantage by itself.

It is simply a configuration choice that should match the mechanical requirements of the machine.

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12. SpeedTEC DIN Connector

The MPL-B4530F-SK72AA uses a SpeedTEC DIN connector in a right-angle arrangement.

The connector is approximately 180° rotatable, which provides additional flexibility during installation and cable routing.

This can be particularly useful when the motor is installed in a restricted space.

The connector arrangement can help with:

• Cable routing.
• Machine enclosure design.
• Connector clearance.
• Cable bend-radius management.
• Maintenance access.
• Motor installation orientation.

The ability to rotate the connector gives the machine designer additional flexibility when planning the motor installation.

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13. Low-Inertia Motor Design

The MPL-B4530F-SK72AA belongs to the MPL low-inertia servo motor family.

Low rotor inertia is particularly useful in applications where the motor repeatedly changes speed.

A typical servo cycle may involve:

1. Rapid acceleration.
2. Controlled movement.
3. Deceleration.
4. Position settling.
5. Short dwell period.
6. Rapid acceleration in another direction.

Because the rotor has relatively low inertia, the servo system does not need to spend as much torque overcoming the rotor’s own rotational inertia during every acceleration and deceleration cycle.

The approximate rotor inertia of the MPL-B4530F family is 0.00040 kg·m².

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14. Product Introduction

The MPL-B4530F-SK72AA is designed for industrial machinery that requires accurate, controlled, and repeatable servo motion.

The motor’s approximately 2.1 kW output and 8.25 N·m continuous torque make it suitable for a broad range of medium-duty servo axes.

The 20.3 N·m peak torque rating provides additional short-term torque capacity during acceleration and other transient operating conditions.

The combination of:

• 3000 rpm speed.
• Low rotor inertia.
• High-resolution encoder.
• Keyless shaft.
• No brake.
• 130 mm frame.
• 76.2 mm magnet stack.

makes the motor particularly suitable for horizontal servo applications where rapid response and precise positioning are required.

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15. Main Product Advantages

15.1 Low-Inertia Construction

The low-inertia design supports rapid acceleration and deceleration.

This can be particularly valuable for short-cycle automated machinery.

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15.2 High-Resolution Feedback

The single-turn high-resolution encoder provides detailed motor-position feedback.

This supports accurate positioning and repeatable motion.

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15.3 3000 rpm Speed Rating

The 3000 rpm operating class provides a useful balance between speed and torque.

It is suitable for many general industrial servo applications.

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15.4 Strong Peak Torque

The approximately 20.3 N·m peak torque capability gives the motor additional short-duration torque capacity.

This is useful during acceleration, deceleration, indexing, and temporary load changes.

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15.5 Keyless Shaft

The keyless shaft provides a clean mechanical interface for compatible clamping couplings.

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15.6 No Brake

For horizontal axes, the absence of a brake can provide a relatively simple and lightweight motor configuration.

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15.7 Compact Frame

The 130 mm frame provides a practical combination of physical size and torque capability.

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15.8 Rotatable Connector

The 180° rotatable right-angle connector helps simplify machine installation and cable routing.

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16. Typical Applications

16.1 Automated Assembly Equipment

The motor can be used for servo-controlled axes in automated assembly machinery.

Typical applications include:

• Component positioning.
• Tool positioning.
• Fixture movement.
• Rotary indexing.
• Product transfer.
• Automated insertion.

The high-resolution encoder is particularly useful when the assembly process requires repeatable positioning.

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17. Packaging Machinery

Packaging equipment frequently requires fast and repeatable servo movement.

The MPL-B4530F-SK72AA can be used for:

• Product indexing.
• Film feeding.
• Cutting mechanisms.
• Label positioning.
• Product transfer.
• Conveyor synchronization.
• Packaging indexing.

The low-inertia design can help the machine perform repeated acceleration and deceleration cycles efficiently.

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18. Material Handling Equipment

The motor can be used in horizontal material-handling applications.

Typical examples include:

• Conveyor positioning.
• Transfer tables.
• Horizontal lifting mechanisms with separate mechanical holding arrangements.
• Product feeders.
• Sorting mechanisms.
• Transfer systems.

Because the motor has no integral brake, vertical gravity-loaded applications should receive additional mechanical and safety evaluation.

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19. Pick-and-Place Machinery

Pick-and-place systems often require rapid movement followed by accurate positioning.

The low rotor inertia helps support rapid changes in speed.

The encoder provides detailed position feedback for the servo controller.

Potential applications include:

• Component placement.
• Automated assembly.
• Packaging transfer.
• Robotic mechanisms.
• Electronic production machinery.

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20. Indexing Machines

Indexing machines are particularly well suited to servo motors with low inertia and high-resolution feedback.

A typical sequence may include:

1. Rapid acceleration.
2. Movement toward the target.
3. Deceleration.
4. Position settling.
5. Machine operation.
6. Movement to the next position.

The MPL-B4530F-SK72AA can provide the combination of dynamic response and feedback resolution needed for this type of motion.

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21. Printing and Converting Machinery

Printing and converting equipment often requires precise synchronization between multiple mechanical elements.

Possible applications include:

• Material feeding.
• Roller positioning.
• Web handling.
• Cutting.
• Registration control.
• Synchronized motion.

The high-resolution feedback can be useful where small differences in position or speed need to be detected and corrected.

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22. Machine Tool Applications

The motor can also be considered for machine-tool auxiliary axes.

Typical applications include:

• Workpiece positioning.
• Auxiliary rotary axes.
• Feed systems.
• Automatic fixture movement.
• Tool positioning.
• Material feeding.

The 3000 rpm rating provides a useful balance between speed and torque for many auxiliary machine axes.

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23. Typical Application Advantages

Application Requirement	MPL-B4530F-SK72AA Advantage
Accurate positioning	High-resolution encoder
Repeated indexing	Low rotor inertia
Fast acceleration	Low-inertia design
Fast deceleration	Low-inertia design
High-resolution feedback	1024 Sin/Cos cycles/rev
Closed-loop control	Hiperface encoder
Medium-power operation	Approx. 2.1 kW
Continuous torque	8.25 N·m
Short-duration torque	20.3 N·m peak
Horizontal axis	No-brake configuration
Flexible coupling	Keyless shaft
Restricted installation space	Rotatable right-angle connector
Compact machine design	130 mm frame

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24. Five Same-Series or Closely Related Models

The following models are closely related to the MPL-B4530F-SK72AA.

Model	Feedback	Shaft	Brake	Speed	Continuous Torque	Peak Torque	Power	Frame	Stack	Weight
MPL-B4530F-SJ72AA	Single-turn high-resolution encoder	Keyed	No	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	130 mm	76.2 mm	Approx. 7.26 kg class
MPL-B4530F-SK72AA	Single-turn high-resolution encoder	Keyless	No	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	130 mm	76.2 mm	Approx. 7.26 kg
MPL-B4530F-SJ74AA	Single-turn high-resolution encoder	Keyed	Yes	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	130 mm	76.2 mm	Approx. 9–10 kg class
MPL-B4530F-SK74AA	Single-turn high-resolution encoder	Keyless	Yes	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	130 mm	76.2 mm	Approx. 9–10 kg class
MPL-B4530K-SK72AA	High-resolution encoder	Keyless	No	4000 rpm	8.25 N·m	20.3 N·m	2.6 kW	130 mm class	76.2 mm class	Approx. 7 kg class

The MPL-B4530F-SJ72AA is the most direct alternative when the machine requires a keyed shaft.

The MPL-B4530F-SK74AA is useful when the machine needs the same keyless-shaft concept but also requires an integrated holding brake.

The MPL-B4530K-SK72AA is worth considering when the application needs a higher rotational speed.

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25. Five Same-Brand Popular Models

The following models represent useful alternatives within the same broad servo motor family.

Model	Configuration	Speed	Continuous Torque	Peak Torque	Rated Power	Frame / Size	Weight
MPL-B430P-MJ74AA	Encoder, keyed shaft, brake	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	115 mm class	Approx. 5.5 kg
MPL-B430P-MK74AA	Encoder, keyless shaft, brake	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	115 mm class	Approx. 5.5 kg
MPL-B4530F-MJ74AA	Encoder, keyed shaft, brake	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	130 mm	Approx. 9.5 kg class
MPL-B4540F-MJ74AA	Encoder, keyed shaft, brake	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	130 mm class	Approx. 8.6 kg
MPL-B4560F-MJ74AA	Encoder, keyed shaft, brake	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	130 mm class	Approx. 11.82 kg

The B430P models are more appropriate when high rotational speed is a major requirement.

The B4530F models provide a balanced 3000 rpm solution around the 8.25 N·m continuous-torque range.

The B4540F and B4560F models are better choices when the machine requires greater torque and power.

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26. Comparison with MPL-B4530F-SJ72AA

The MPL-B4530F-SJ72AA and MPL-B4530F-SK72AA are extremely close electrically.

The main difference is the shaft configuration.

Parameter	MPL-B4530F-SK72AA	MPL-B4530F-SJ72AA
Feedback	Single-turn high-resolution encoder	Single-turn high-resolution encoder
Feedback	1024 Sin/Cos, Hiperface	1024 Sin/Cos, Hiperface
Rated Speed	3000 rpm	3000 rpm
Continuous Torque	8.25 N·m	8.25 N·m
Peak Torque	20.3 N·m	20.3 N·m
Rated Power	Approx. 2.1 kW	Approx. 2.1 kW
Shaft	Keyless	Keyed
Brake	No	No
Frame	130 mm	130 mm
Stack	76.2 mm	76.2 mm
Weight	Approx. 7.26 kg	Approx. 7.26 kg class

If the machine is designed for a keyless coupling, the SK72AA is the more suitable configuration.

If the machine already uses a conventional keyed coupling, the SJ72AA is the more appropriate choice.

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27. Comparison with MPL-B4530F-SK74AA

The SK72AA and SK74AA use the same general keyless-shaft and encoder concept.

The main difference is the brake.

Parameter	MPL-B4530F-SK72AA	MPL-B4530F-SK74AA
Feedback	High-resolution encoder	High-resolution encoder
Shaft	Keyless	Keyless
Brake	No	24 V DC holding brake
Rated Speed	3000 rpm	3000 rpm
Continuous Torque	8.25 N·m	8.25 N·m
Peak Torque	20.3 N·m	20.3 N·m
Rated Power	Approx. 2.1 kW	Approx. 2.1 kW
Frame	130 mm	130 mm
Stack	76.2 mm	76.2 mm
Approx. Weight	7.26 kg	Approx. 9–10 kg class
Typical Application	Horizontal axes	Vertical / holding axes

For a horizontal application without a holding requirement, the SK72AA is a straightforward choice.

For a vertical axis where the load needs mechanical holding, the SK74AA is generally the more appropriate configuration.

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28. Comparison with MPL-B4530F-RK72AA

The MPL-B4530F-RK72AA is another closely related no-brake, keyless-shaft configuration.

The primary difference is feedback technology.

Parameter	MPL-B4530F-SK72AA	MPL-B4530F-RK72AA
Feedback	High-resolution encoder	Resolver
Feedback Resolution	1024 Sin/Cos cycles/rev	Resolver
Feedback Protocol	Hiperface	Resolver interface
Shaft	Keyless	Keyless
Brake	No	No
Rated Speed	3000 rpm	3000 rpm
Continuous Torque	8.25 N·m	8.25 N·m
Peak Torque	20.3 N·m	20.3 N·m
Rated Power	Approx. 2.1 kW	Approx. 2.1 kW
Frame	130 mm	130 mm
Stack	76.2 mm	76.2 mm
Weight	Approx. 7.26 kg	Approx. 7.3 kg class

The SK72AA is preferable when the control system requires the high-resolution encoder configuration.

The RK72AA is more appropriate when resolver feedback is preferred.

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29. Comparison with MPL-B430P

The B430P family is designed around a higher-speed operating range.

Parameter	MPL-B4530F-SK72AA	MPL-B430P
Rated Speed	3000 rpm	5000 rpm
Continuous Torque	8.25 N·m	6.55 N·m
Peak Torque	20.3 N·m	19.8 N·m
Rated Power	2.1 kW	2.2 kW
Rotor Inertia	Approx. 0.00040 kg·m²	Approx. 0.00038 kg·m²
Frame	130 mm	115 mm class
Feedback	High-resolution encoder	Configuration dependent
Shaft	Keyless	Configuration dependent
Brake	No	Configuration dependent
Weight	Approx. 7.26 kg	Approx. 5.5 kg class

The B430P is a better direction when higher rotational speed and a smaller frame are priorities.

The B4530F is preferable when the application needs greater continuous torque at 3000 rpm.

The family-level figures for these motor groups show 5000 rpm and 6.55 N·m continuous torque for MPL-B430P, compared with 3000 rpm and 8.25 N·m for MPL-B4530F.

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30. Comparison with MPL-B4540F

The MPL-B4540F family offers higher torque than the MPL-B4530F family.

Parameter	MPL-B4530F-SK72AA	MPL-B4540F
Rated Speed	3000 rpm	3000 rpm
Continuous Torque	8.25 N·m	10.2 N·m
Peak Torque	20.3 N·m	27.1 N·m
Rated Power	2.1 kW	2.6 kW
Rotor Inertia	Approx. 0.00040 kg·m²	Approx. 0.00052 kg·m²
Frame	130 mm	130 mm class
Stack	76.2 mm	101.6 mm class
Weight	Approx. 7.26 kg	Approx. 8.6 kg class

If the B4530F is approaching its continuous torque limit, the B4540F provides a larger torque margin.

The B4540F family is listed at approximately 10.2 N·m continuous stall torque, 27.1 N·m peak torque, 2.6 kW output, and approximately 8.6 kg motor weight.

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31. Why Choose the MPL-B4530F-SK72AA?

The MPL-B4530F-SK72AA is a particularly practical choice when a machine requires a 3000 rpm low-inertia servo motor with high-resolution feedback and a keyless shaft.

Its combination of approximately 8.25 N·m continuous torque and 20.3 N·m peak torque provides a useful torque range for many industrial axes.

The high-resolution encoder gives the servo controller detailed motor-position information.

The low rotor inertia supports fast dynamic response.

The keyless shaft is convenient for machines designed around clamping-type servo couplings.

The no-brake configuration is well suited to horizontal applications where the motor does not need to mechanically hold a gravity-loaded load.

The 130 mm frame also provides a useful balance between motor size and torque capacity.

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32. Main Advantages at a Glance

Advantage	Practical Benefit
Low-inertia rotor	Fast acceleration and deceleration
High-resolution encoder	Detailed position feedback
1024 Sin/Cos cycles/rev	High feedback detail
Hiperface protocol	Closed-loop servo control
3000 rpm rating	Balanced speed and torque
8.25 N·m continuous torque	Medium-duty servo capability
20.3 N·m peak torque	Strong acceleration capability
Approx. 2.1 kW output	Medium-power machine axes
Keyless shaft	Flexible coupling arrangement
No brake	Simple horizontal-axis configuration
130 mm frame	Compact industrial package
76.2 mm stack	Useful torque capability
SpeedTEC DIN connector	Practical industrial connection
180° connector rotation	Flexible cable routing
IEC metric mounting	Convenient machine integration

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33. Typical Machine Categories

The MPL-B4530F-SK72AA can be considered for many different types of industrial equipment.

Packaging Machines

Suitable for servo-controlled feeding, indexing, cutting, product positioning, and synchronized movement.

Assembly Machines

Suitable for component positioning, fixture movement, tooling, indexing, and transfer systems.

Material Handling

Suitable for horizontal conveyors, product transfer, feeders, sorting systems, and positioning mechanisms.

Pick-and-Place Machines

Suitable for repetitive high-speed movement followed by accurate positioning.

Machine Tools

Suitable for auxiliary axes, feeding systems, workpiece positioning, and automated fixtures.

Printing and Converting Equipment

Suitable for feeding, positioning, cutting, registration, and synchronized movement.

General Factory Automation

Suitable for industrial servo axes where accurate closed-loop motion is required and an integrated holding brake is unnecessary.

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34. Application Selection Guide

Machine Requirement	Recommended Configuration
High-resolution encoder	MPL-B4530F-SK72AA
Keyless shaft	MPL-B4530F-SK72AA
No integral brake	MPL-B4530F-SK72AA
Keyed shaft	MPL-B4530F-SJ72AA
Keyless shaft + brake	MPL-B4530F-SK74AA
Keyed shaft + brake	MPL-B4530F-SJ74AA
Resolver + keyless shaft	MPL-B4530F-RK72AA
Higher speed	MPL-B4530K family
Higher torque	MPL-B4540F or MPL-B4560F family
Smaller high-speed motor	MPL-B430P family

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35. Mechanical Installation Considerations

Correct mechanical installation is important for achieving stable servo performance.

The motor flange should be properly aligned with the machine.

The keyless coupling should be installed according to the coupling manufacturer’s requirements.

The following items should be checked before commissioning:

• Flange alignment.
• Shaft alignment.
• Coupling compatibility.
• Coupling clamping force.
• Radial shaft loading.
• Axial shaft loading.
• Load inertia.
• Mechanical resonance.
• Connector clearance.
• Cable bending radius.
• Motor ventilation.
• Ambient temperature.
• Servo drive compatibility.
• Feedback interface compatibility.

Because servo motors can accelerate and decelerate very quickly, mechanical alignment and coupling quality are particularly important.

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36. Encoder and Drive Compatibility

The MPL-B4530F-SK72AA uses a single-turn high-resolution encoder with Hiperface protocol.

Therefore, the selected servo drive and feedback interface must be compatible with this feedback configuration.

The MPL family is commonly associated with several industrial servo drive platforms, including:

• Kinetix 5500.
• Kinetix 6200.
• Kinetix 6500.
• Kinetix 6000.
• Kinetix 300.
• Kinetix 350.
• Kinetix 2000.
• Kinetix 7000.
• Ultra 3000.

The exact drive compatibility should always be checked against the specific motor revision, feedback configuration, application requirements, and drive firmware.

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37. Load and Inertia Considerations

Servo motor selection should not be based only on motor rated torque.

The complete machine load should be considered.

Important factors include:

• Reflected load inertia.
• Gear ratio.
• Coupling inertia.
• Acceleration time.
• Deceleration time.
• Required cycle time.
• Continuous load torque.
• Peak load torque.
• Friction.
• Mechanical efficiency.
• Operating speed.
• Duty cycle.

A motor with adequate continuous torque may still be unsuitable if its peak torque requirement is exceeded during acceleration.

Likewise, a motor with sufficient peak torque may not be suitable if the continuous load is too high.

The MPL-B4530F-SK72AA should therefore be evaluated using the complete motion profile rather than a single torque value.

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38. Horizontal and Vertical Applications

The absence of an integral brake makes the SK72AA particularly straightforward for horizontal servo axes.

Horizontal applications generally include:

• Conveyor positioning.
• Rotary indexing.
• Horizontal transfer.
• Feeding.
• Cutting.
• Packaging.
• Assembly.

Vertical applications require additional consideration.

If the load can fall or move under gravity when servo torque is removed, a brake-equipped motor or separate mechanical holding mechanism may be required.

The SK72AA should therefore not automatically be selected for a vertical load simply because its torque rating is sufficient.

The mechanical holding requirement must be evaluated separately.

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39. Product Weight and Physical Handling

The MPL-B4530F-SK72AA has an approximate weight of 7.26 kg.

This is significantly lighter than many brake-equipped configurations of the same general motor family.

Physical Characteristic	Value
Model	MPL-B4530F-SK72AA
Frame	130 mm
Stack Length	76.2 mm
Weight	Approx. 7.26 kg
Brake	No
Shaft	Keyless
Connector	SpeedTEC DIN
Connector Style	Right Angle

The relatively moderate weight can be advantageous when the motor is mounted on moving machine components.

Reducing moving mass can be useful in applications such as robotic mechanisms, transfer axes, and positioning systems.

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40. Product Selection Advantages for Machine Builders

For machine builders, the MPL-B4530F-SK72AA provides several useful characteristics in one motor configuration.

The keyless shaft allows integration with suitable clamping couplings.

The no-brake design is suitable for horizontal axes where mechanical holding is not required.

The high-resolution encoder provides detailed position feedback.

The low-inertia rotor supports dynamic motion.

The 3000 rpm rating provides a practical operating range for many industrial axes.

The 130 mm frame keeps the motor within a commonly used industrial frame size.

The 7.26 kg approximate weight is also reasonable for a motor in this torque class.

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41. Technical Summary

Category	MPL-B4530F-SK72AA
Brand	Allen-Bradley
Product Series	MP-Series MPL
Series Type	Low-Inertia Servo Motor
Motor Type	Brushless AC Rotary Servo
Voltage Class	400 V AC
Armature Voltage	460 V
Frame Size	Frame 45
Frame Diameter	130 mm
Magnet Stack	76.2 mm
Rated Speed	3000 rpm
Continuous Stall Torque	8.25 N·m
Peak Torque	20.3 N·m
Rated Output	Approx. 2.1 kW
Rotor Inertia	Approx. 0.00040 kg·m²
Feedback	Single-turn High-resolution Encoder
Resolution	1024 Sin/Cos cycles/revolution
Protocol	Hiperface
Shaft	Keyless
Shaft Seal	No
Brake	No
Connector	SpeedTEC DIN
Connector Style	Right Angle
Connector Rotation	180°
Mounting	IEC Metric
Mounting Holes	Free / Type FF
Approximate Weight	7.26 kg
Typical Application	Industrial Motion Control
Primary Strength	High-resolution feedback + low inertia + keyless shaft
Typical Axis	Horizontal Servo Axis

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42. Final Product Description

The Allen-Bradley MPL-B4530F-SK72AA is a 3000 rpm low-inertia brushless AC servo motor designed for industrial automation systems that require accurate positioning, fast dynamic response, and reliable closed-loop motion control.

Its main specifications include a 130 mm frame, 76.2 mm magnet stack, approximately 8.25 N·m continuous stall torque, approximately 20.3 N·m peak torque, and approximately 2.1 kW rated output.

The motor uses a single-turn high-resolution encoder with 1024 Sin/Cos cycles per revolution and Hiperface protocol, providing detailed position feedback for servo control.

The most distinctive mechanical feature is the keyless shaft extension.

This makes the motor especially appropriate for machinery designed around compatible clamping or friction-lock couplings.

The motor also has no integral brake, which makes it a natural choice for horizontal axes where mechanical holding is not required.

Its low-inertia rotor supports rapid acceleration and deceleration, making the motor suitable for machines with frequent starts, stops, reversals, and indexing cycles.

The SpeedTEC DIN right-angle connector with approximately 180° rotational flexibility provides additional freedom when routing motor cables and designing the machine enclosure.

The approximate motor weight is 7.26 kg, making it a relatively manageable motor for its 130 mm frame and torque class.

In practical terms, the MPL-B4530F-SK72AA can be described as a medium-power, 3000 rpm, low-inertia servo motor with high-resolution single-turn encoder feedback, keyless shaf