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Allen-Bradley MPL-B4530F-SK74AA Servo Motor

1. Product Overview

The MPL-B4530F-SK74AA is a high-performance AC rotary servo motor from the Allen-Bradley MP-Series MPL low-inertia servo motor family. It is designed for industrial motion-control applications where accurate positioning, repeatable movement, fast acceleration, controlled deceleration, and reliable torque performance are important.

This model uses a 130 mm frame size, a 76.2 mm magnet stack length, and a rated speed of 3000 rpm. It belongs to the 400 V class and is designed around a 460 V armature voltage configuration.

The motor uses a single-turn high-resolution absolute encoder, a keyless shaft, and a 24 V DC holding brake. Its mechanical arrangement also includes an IEC metric mounting flange and a right-angle SpeedTEC DIN connector that can be rotated through 180 degrees.

The combination of low rotor inertia, high continuous torque, high peak torque, high-resolution feedback, and an integrated holding brake makes the MPL-B4530F-SK74AA particularly suitable for automated machinery that requires both dynamic motion and controlled stopping.

The product is especially useful in machine-building applications where the servo motor must fit into a relatively compact mechanical envelope while still providing substantial torque capacity.

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2. Brand and Product Series

Item	Details
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Product Type	AC Rotary Servo Motor
Model	MPL-B4530F-SK74AA
Voltage Class	400 V
Armature Voltage	460 V
Motor Technology	Permanent-magnet brushless servo motor
Feedback	Single-turn high-resolution absolute encoder
Rated Speed	3000 rpm
Brake	24 V DC holding brake
Shaft Configuration	Keyless shaft
Mounting Standard	IEC metric
Frame Size	130 mm
Magnet Stack Length	76.2 mm
Motor Type	Low-inertia servo motor

The MPL series is intended for motion applications where rapid response and accurate control are important. The low-inertia rotor design helps the motor respond quickly to changes in commanded speed and position, making it well suited to applications with frequent acceleration, deceleration, indexing, and direction changes.

The MPL-B4530F-SK74AA is a particularly useful configuration because it combines a high-resolution single-turn feedback system with a keyless shaft and a 24 V DC holding brake.

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3. Detailed Technical Parameters

Parameter	MPL-B4530F-SK74AA Specification
Model	MPL-B4530F-SK74AA
Brand	Allen-Bradley
Series	MP-Series MPL
Product Type	Rotary AC Servo Motor
Voltage Class	400 V
Armature Voltage	460 V
Rated Speed	3000 rpm
Frame Size	130 mm
Frame Size Equivalent	5.12 in.
Magnet Stack Length	76.2 mm
Magnet Stack Length Equivalent	3.0 in.
Continuous Stall Torque	Approximately 8.25 N·m
Peak Stall Torque	Approximately 20.3 N·m
Rated Continuous Power	Approximately 2.1 kW
Rotor Inertia	Approximately 0.00040 kg·m²
Feedback	Single-turn high-resolution absolute encoder
Encoder Resolution	1024 Sin/Cos cycles per revolution
Encoder Protocol	Hiperface
Shaft	Keyless
Shaft Seal	No shaft seal
Brake	24 V DC holding brake
Connector	SpeedTEC DIN connector
Connector Orientation	Right-angle
Connector Rotation	180° rotatable
Mounting	IEC metric flange
Mounting Holes	Free mounting holes, Type FF
Motor Construction	Low inertia
Approx. Product Weight	3.09 kg
Approx. Weight in Pounds	6.8 lb
Application Type	Industrial motion control
Feedback Type	Absolute single-turn
Motor Speed Class	3000 rpm

The principal configuration is documented as a 130 mm frame, 76.2 mm stack, 3000 rpm motor with a single-turn high-resolution encoder, keyless shaft, SpeedTEC DIN connector, and 24 V DC brake.

The approximately 3.09 kg product weight is also consistent with detailed product listings for this exact catalog number.

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4. Dimensions and Mechanical Configuration

The physical dimensions of the MPL-B4530F-SK74AA are based around a 130 mm frame size and a 76.2 mm magnet stack length.

Mechanical Parameter	Specification
Frame Diameter / Flange Size Class	130 mm
Frame Size	130 mm / 5.12 in.
Magnet Stack	76.2 mm / 3.0 in.
Shaft Type	Keyless
Shaft Key	None
Shaft Seal	None
Mounting Standard	IEC metric
Mounting Type	Free mounting holes / Type FF
Connector Type	SpeedTEC DIN
Connector Position	Right-angle
Connector Rotation	180°
Brake	Integrated 24 V DC holding brake
Approx. Weight	3.09 kg

The 130 mm frame size provides a useful balance between mechanical compactness and torque capability. It is large enough to support the torque requirements of many industrial machine axes without moving into the substantially larger physical envelope of high-torque servo motors.

The 76.2 mm magnet stack is another important part of the motor configuration. The stack length contributes to the motor’s torque-producing capability and distinguishes this motor from shorter or longer stack versions within the same family.

For detailed machine design work, the complete overall motor envelope should be taken from the mechanical drawing for the exact revision because the connector, shaft-end configuration, mounting arrangement, and brake assembly can affect the final installed envelope.

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5. Motor Performance

The MPL-B4530F-SK74AA is designed as a low-inertia servo motor. Low inertia is particularly valuable in applications where the motor must repeatedly change speed or direction.

Its approximate continuous stall torque is 8.25 N·m, while its peak stall torque is approximately 20.3 N·m. The MPL-B4530F family is rated around 2.1 kW continuous power at the 3000 rpm speed class.

Performance Parameter	Typical Specification
Rated Speed	3000 rpm
Continuous Stall Torque	8.25 N·m
Peak Stall Torque	20.3 N·m
Rated Continuous Power	Approx. 2.1 kW
Rotor Inertia	Approx. 0.00040 kg·m²
Voltage Class	400 V
Armature Voltage	460 V

The relationship between low rotor inertia and torque output is important in servo applications. A motor does not simply need to produce torque; it must be able to change its operating condition quickly enough to follow the machine’s motion profile.

For example, a machine that repeatedly moves from one position to another may require the servo motor to accelerate rapidly, reach a controlled speed, decelerate, stop accurately, and then immediately begin another movement. The low-inertia construction of the MPL family is well suited to this type of operating pattern.

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6. Encoder and Feedback System

One of the major features of the MPL-B4530F-SK74AA is its single-turn high-resolution absolute encoder.

The encoder provides feedback to the motion-control system so that the drive can monitor motor position, speed, and movement behavior.

The encoder configuration is associated with 1024 Sin/Cos cycles per revolution and an absolute single-turn feedback system using the Hiperface protocol.

Feedback Parameter	Specification
Feedback Type	Single-turn absolute encoder
Resolution	High-resolution
Sin/Cos Cycles	1024 cycles/revolution
Protocol	Hiperface
Feedback Purpose	Position and speed feedback
Suitable Motion Function	Servo positioning and velocity control

The single-turn absolute feedback arrangement is useful in machines where accurate shaft position is important.

Compared with a basic incremental feedback arrangement, an absolute feedback system can provide a more informative position reference within a single mechanical revolution. This is particularly useful in positioning equipment, indexing machinery, automated handling equipment, and other machines where the motor must repeatedly return to controlled positions.

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7. Keyless Shaft Design

The MPL-B4530F-SK74AA uses a keyless shaft extension.

Shaft Parameter	Specification
Shaft Type	Keyless
Shaft Key	No
Shaft Seal	No
Mechanical Purpose	Direct coupling / clamp-style coupling applications

A keyless shaft can be advantageous when the motor is connected to the machine through a suitable clamp-style coupling or other compatible mechanical connection.

The absence of a shaft key can simplify certain coupling arrangements and can help provide a clean shaft interface for applications where the machine designer prefers a keyless connection.

This configuration is particularly attractive when the mechanical design already uses precision couplings rather than keyed hubs.

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8. Integrated 24 V DC Holding Brake

A major difference between the SK74AA and the corresponding SK72AA configuration is the presence of the brake.

The MPL-B4530F-SK74AA includes a 24 V DC holding brake.

Brake Parameter	Specification
Brake	Integrated holding brake
Brake Voltage	24 V DC
Brake Type	Holding brake
Primary Function	Holding the motor/load when motion is not commanded
Typical Use	Vertical axes, positioning axes, safety-oriented holding functions

The brake is especially useful for applications in which the motor must hold a load when servo torque is removed.

Typical examples include vertical axes, lifting mechanisms, indexing mechanisms, and machines where the motor shaft should remain mechanically restrained when the drive is disabled.

It is important to distinguish a holding brake from a dynamic stopping brake. The integrated brake is primarily intended to hold the load rather than serve as the normal method of stopping a rapidly moving machine.

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9. SpeedTEC DIN Connector

The motor uses a right-angle SpeedTEC DIN connector with approximately 180° rotational adjustment.

This arrangement is useful when installation space around the rear of the motor is limited.

A right-angle connector can help keep cables closer to the machine structure instead of extending directly behind the motor.

The ability to rotate the connector provides additional flexibility when routing motor and feedback cables.

This is particularly useful in compact machine designs where cable routing can otherwise become a mechanical interference problem.

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10. Product Introduction

The MPL-B4530F-SK74AA is designed for industrial servo applications that require a combination of speed, torque, positioning accuracy, feedback resolution, and mechanical flexibility.

Its 3000 rpm rating provides a practical operating speed for many general-purpose machine axes.

The low-inertia construction helps the motor respond quickly to command changes. This is especially valuable in machines with frequent acceleration and deceleration cycles.

The single-turn high-resolution encoder provides the feedback required for precise servo control.

The keyless shaft gives the machine designer additional flexibility when selecting the coupling arrangement.

The integrated 24 V DC holding brake adds another layer of mechanical functionality, particularly for applications where the axis needs to remain held after the servo command is removed.

The overall configuration therefore makes this motor a strong candidate for automated production equipment, motion-control machinery, material handling systems, packaging equipment, indexing systems, and other industrial machines.

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11. Main Product Advantages

11.1 Low-Inertia Construction

The low-inertia rotor design is one of the defining characteristics of the MPL family.

Low inertia allows the motor to change speed quickly because the control system does not have to accelerate and decelerate a very large rotating mass.

This can improve machine cycle time and make the motor particularly suitable for repeated positioning movements.

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11.2 High Torque in a Compact Frame

The 130 mm frame and 76.2 mm stack provide a useful torque-to-size combination.

The motor can deliver approximately 8.25 N·m of continuous stall torque and approximately 20.3 N·m of peak stall torque.

This makes it suitable for machine axes where moderate-to-high torque is required without moving immediately to a substantially larger motor frame.

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11.3 High-Resolution Feedback

The single-turn high-resolution encoder allows the servo system to monitor motor movement accurately.

This is important for applications requiring controlled positioning, synchronized movement, repeatable indexing, and accurate speed regulation.

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11.4 Integrated Holding Brake

The 24 V DC brake is a major practical advantage when the axis must remain stationary while the servo system is disabled or not producing holding torque.

This is particularly useful for vertical mechanisms and other loads where uncontrolled movement after servo power removal would be undesirable.

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11.5 Keyless Shaft

The keyless shaft makes the motor suitable for coupling systems designed around clamp-type or precision shaft couplings.

This can simplify certain machine layouts and gives designers greater flexibility in mechanical transmission design.

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11.6 Flexible Connector Orientation

The right-angle connector with 180° rotational capability is useful in compact machinery.

Cable routing can often be arranged more cleanly, reducing the chance of interference with covers, machine frames, guards, or moving components.

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11.7 Industrial Machine Integration

The motor uses an IEC metric mounting configuration, making it convenient for industrial machine designs based around metric mechanical standards.

The 130 mm frame size is also a common practical size for medium-duty servo axes.

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12. Typical Applications

12.1 Packaging Machinery

The MPL-B4530F-SK74AA can be used for positioning and motion axes in packaging machinery.

Typical functions include:

• Product positioning
• Conveyor synchronization
• Cutting mechanisms
• Sealing mechanisms
• Label positioning
• Film feeding
• Indexing systems
• Product handling

Packaging equipment often requires repeated acceleration and deceleration, making the low-inertia design useful.

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12.2 Material Handling

The motor can be applied to automated material-handling systems where controlled positioning and repeatable movement are required.

Possible applications include:

• Transfer mechanisms
• Conveyor positioning
• Automated handling axes
• Pick-and-place equipment
• Sorting mechanisms
• Positioning tables

The integrated brake is particularly useful where an axis needs to remain mechanically held while the machine is stopped.

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12.3 Pick-and-Place Machines

Pick-and-place equipment often requires fast movements followed by precise positioning.

The low-inertia rotor helps support fast acceleration and deceleration, while the high-resolution feedback system supports controlled positioning.

The motor can therefore be suitable for:

• Robotic handling mechanisms
• Linear transfer systems
• Component placement equipment
• Automated assembly machines
• Multi-axis positioning systems

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12.4 Indexing Machines

Indexing applications require the motor to repeatedly move between predefined positions.

The servo motor can accelerate, decelerate, and stop according to the programmed motion profile.

The integrated brake can provide additional holding capability where required.

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12.5 Printing Machinery

Printing and converting equipment often requires accurate speed synchronization and repeatable positioning.

The MPL-B4530F-SK74AA can be considered for:

• Roller positioning
• Feed mechanisms
• Web handling
• Indexing sections
• Cutting sections
• Registration systems

The high-resolution feedback system is useful when the machine requires precise motion coordination.

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12.6 Machine Tools

The motor can also be applied to machine-tool auxiliary axes.

Possible uses include:

• Feed axes
• Tool positioning
• Automatic positioning systems
• Workpiece handling
• Auxiliary rotary mechanisms

The exact suitability depends on the required torque, speed, inertia ratio, duty cycle, and drive configuration.

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12.7 Assembly Machinery

Automated assembly systems often require repeated positioning and controlled movement.

The motor can support applications such as:

• Screwdriving mechanisms
• Part positioning
• Component insertion
• Rotary indexing
• Transfer mechanisms
• Automated fixtures

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12.8 Vertical Motion Applications

The integrated holding brake makes the SK74AA version particularly interesting for vertical axes.

Typical applications include:

• Lifting mechanisms
• Vertical slides
• Elevating platforms
• Vertical positioning tables
• Automated loading mechanisms

For these applications, the brake selection, load inertia, gravitational torque, stopping method, and safety requirements should all be evaluated as part of the complete axis design.

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13. Five Same-Series or Closely Related Models

The following models are closely related to the MPL-B4530F-SK74AA and can be considered when selecting a motor for a similar application.

Model	Feedback	Shaft	Brake	Speed	Frame / Stack	Typical Torque Class	Approx. Weight
MPL-B4530F-SK72AA	Single-turn high-resolution	Keyless	No brake	3000 rpm	130 mm / 76.2 mm	8.25 N·m continuous	Approx. 7.26 kg
MPL-B4530F-SJ74AA	Single-turn high-resolution	Keyed	24 V DC brake	3000 rpm	130 mm / 76.2 mm	8.25 N·m continuous	Approx. 7.3 kg
MPL-B4530F-SK74AA	Single-turn high-resolution	Keyless	24 V DC brake	3000 rpm	130 mm / 76.2 mm	8.25 N·m continuous	Approx. 3.09 kg listed
MPL-B4530F-RK74AA	Resolver	Keyless	24 V DC brake	3000 rpm	130 mm / 76.2 mm	Approx. 8.25 N·m class	Approx. 7.3–9.5 kg depending on configuration/listing
MPL-B4530F-MK74AA	Multi-turn high-resolution absolute	Keyless	24 V DC brake	3000 rpm	130 mm / 76.2 mm	Approx. 8.25 N·m continuous	Approx. 7.3 kg

The closely related SK72AA uses the same basic motor size and feedback family but does not include the 24 V DC brake. The SJ74AA adds a brake while using a keyed shaft instead of the keyless shaft used by the SK74AA.

The MK74AA moves to multi-turn high-resolution absolute feedback, making it attractive when the application requires absolute multi-turn position information.

The resolver-based models are another alternative when resolver feedback is preferred for the machine’s motion-control architecture.

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14. Five Recommended Same-Series Models with Parameters

14.1 MPL-B4530F-SK72AA

Parameter	Specification
Model	MPL-B4530F-SK72AA
Series	MP-Series MPL
Frame	130 mm
Magnet Stack	76.2 mm
Rated Speed	3000 rpm
Feedback	Single-turn high-resolution encoder
Shaft	Keyless
Brake	None
Continuous Stall Torque	Approx. 8.25 N·m
Peak Stall Torque	Approx. 20.3 N·m
Power	Approx. 2.1 kW
Weight	Approx. 7.26 kg

This is the closest configuration to the SK74AA. The main difference is the absence of the integrated 24 V DC holding brake.

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14.2 MPL-B4530F-SJ74AA

Parameter	Specification
Model	MPL-B4530F-SJ74AA
Series	MP-Series MPL
Frame	130 mm
Magnet Stack	76.2 mm
Rated Speed	3000 rpm
Feedback	Single-turn high-resolution encoder
Shaft	Keyed
Brake	24 V DC
Continuous Stall Torque	Approx. 8.25 N·m
Peak Stall Torque	Approx. 20.3 N·m
Power	Approx. 2.1 kW
Weight	Approx. 7.3 kg

This model is a good alternative when the application requires a brake but the machine coupling is designed around a keyed shaft.

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14.3 MPL-B4530F-MK74AA

Parameter	Specification
Model	MPL-B4530F-MK74AA
Series	MP-Series MPL
Frame	130 mm
Magnet Stack	76.2 mm
Rated Speed	3000 rpm
Feedback	Multi-turn high-resolution absolute encoder
Shaft	Keyless
Brake	24 V DC
Continuous Stall Torque	Approx. 8.25 N·m
Peak Stall Torque	Approx. 20.3 N·m
Power	Approx. 2.1 kW
Weight	Approx. 7.3 kg

This configuration is worth considering when the machine requires multi-turn absolute feedback rather than single-turn feedback.

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14.4 MPL-B4530K-SK74AA

Parameter	Specification
Model	MPL-B4530K-SK74AA
Series	MP-Series MPL
Frame	130 mm
Magnet Stack	76.2 mm
Rated Speed	4000 rpm
Feedback	Single-turn high-resolution encoder
Shaft	Keyless
Brake	24 V DC
Voltage Class	400 V
Mounting	IEC metric
Connector	SpeedTEC DIN
Application	Higher-speed servo motion

The K-stack configuration maintains the same 130 mm frame and 76.2 mm stack dimensions but increases the rated speed to approximately 4000 rpm.

This can be a useful choice for machines where speed is more important than simply matching the 3000 rpm version.

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14.5 MPL-B4540F-MJ74AA

Parameter	Specification
Model	MPL-B4540F-MJ74AA
Series	MP-Series MPL
Frame Class	130 mm class
Stack Length	101.6 mm
Rated Speed	3000 rpm
Feedback	Multi-turn high-resolution encoder
Shaft	Keyed
Brake	24 V DC
Continuous Torque Class	Approx. 10.2 N·m
Peak Torque Class	Approx. 27.1 N·m
Continuous Power	Approx. 2.6 kW
Rotor Inertia	Approx. 0.00052 kg·m²
Weight	Approx. 8.6 kg

This model is a useful step upward when the machine needs more torque than the MPL-B4530F family can provide.

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15. Five Popular Models from the Same Brand

The following models are useful comparison points from the same brand and are representative of different MP-Series MPL motor sizes and performance levels.

Model	Series	Speed	Continuous Torque	Peak Torque	Power	Frame / Size Class	Approx. Weight
MPL-B430P-MJ74AA	MP-Series MPL	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	130 mm class	Approx. 5.5 kg
MPL-B4530F-MJ74AA	MP-Series MPL	3000 rpm	8.25 N·m	20.3 N·m	2.1 kW	130 mm / 76.2 mm	Approx. 7.3 kg
MPL-B4540F-MJ74AA	MP-Series MPL	3000 rpm	10.2 N·m	27.1 N·m	2.6 kW	130 mm class	Approx. 8.6 kg
MPL-B4560F-MJ74AA	MP-Series MPL	3000 rpm	14.1 N·m	34.4 N·m	3.2 kW	130 mm class	Approx. 11.82 kg
MPL-B540K	MP-Series MPL	4000 rpm	19.4 N·m	48.6 N·m	5.4 kW	Larger frame class	Approx. 15.0 kg

These models cover a useful range from relatively fast, lower-inertia motors through higher-torque options.

The MPL-B430P family is especially useful when the application prioritizes higher rotational speed, while the larger B4540F and B4560F configurations provide more torque for heavier machine axes.

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16. Comparison: SK74AA vs SK72AA

Feature	MPL-B4530F-SK74AA	MPL-B4530F-SK72AA
Frame	130 mm	130 mm
Stack	76.2 mm	76.2 mm
Speed	3000 rpm	3000 rpm
Feedback	Single-turn high-resolution	Single-turn high-resolution
Shaft	Keyless	Keyless
Brake	24 V DC	No brake
Continuous Torque	Approx. 8.25 N·m	Approx. 8.25 N·m
Peak Torque	Approx. 20.3 N·m	Approx. 20.3 N·m
Primary Difference	Integrated holding brake	No integrated brake

The choice is straightforward when the mechanical requirements are clear.

Choose the SK74AA when a holding brake is required.

Choose the SK72AA when a brake is not required and the simpler configuration is preferred.

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17. Comparison: SK74AA vs SJ74AA

Feature	MPL-B4530F-SK74AA	MPL-B4530F-SJ74AA
Frame	130 mm	130 mm
Stack	76.2 mm	76.2 mm
Speed	3000 rpm	3000 rpm
Feedback	Single-turn high-resolution	Single-turn high-resolution
Shaft	Keyless	Keyed
Brake	24 V DC	24 V DC
Torque Class	8.25 N·m continuous	8.25 N·m continuous
Mechanical Difference	Keyless coupling	Keyed coupling

The primary selection factor is the shaft arrangement.

For a clamp-style or precision keyless coupling, the SK74AA is generally the more appropriate configuration.

For a traditional keyed coupling arrangement, the SJ74AA may be more convenient.

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18. Comparison: SK74AA vs MK74AA

Feature	MPL-B4530F-SK74AA	MPL-B4530F-MK74AA
Frame	130 mm	130 mm
Stack	76.2 mm	76.2 mm
Speed	3000 rpm	3000 rpm
Feedback	Single-turn absolute	Multi-turn absolute
Shaft	Keyless	Keyless
Brake	24 V DC	24 V DC
Feedback Complexity	Standard single-turn	Multi-turn position capability
Application Focus	General positioning	Applications requiring multi-turn absolute position

The MK74AA is a useful alternative when the machine needs multi-turn absolute feedback capability.

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19. Comparison: SK74AA vs Higher-Torque MPL Motors

When the application requires more continuous torque, moving to a longer-stack or larger-frame motor can be more appropriate than trying to operate the SK74AA near its limits.

For example, the B4540F and B4560F families provide progressively higher torque capacity.

Motor	Continuous Torque	Peak Torque	Power	Speed
MPL-B4530F-SK74AA	8.25 N·m	20.3 N·m	Approx. 2.1 kW	3000 rpm
MPL-B4540F	10.2 N·m	27.1 N·m	Approx. 2.6 kW	3000 rpm
MPL-B4560F	14.1 N·m	34.4 N·m	Approx. 3.2 kW	3000 rpm

The SK74AA is therefore best viewed as a medium-duty servo motor rather than a high-torque motor.

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20. Application Advantages

The MPL-B4530F-SK74AA offers several practical advantages when used in the right machine.

Fast Dynamic Response

The low-inertia design supports rapid acceleration and deceleration.

Precise Position Control

The high-resolution single-turn encoder provides detailed feedback for motion control.

Compact Mechanical Size

The 130 mm frame gives the motor a useful balance between torque capacity and installation space.

Integrated Holding Brake

The 24 V DC brake adds holding capability for suitable applications.

Keyless Mechanical Interface

The keyless shaft is suitable for machines designed around precision couplings.

Flexible Cable Routing

The right-angle connector and 180° rotation capability can simplify installation in compact machines.

Broad Industrial Use

The motor can be applied to packaging, handling, indexing, assembly, positioning, printing, and other automated machinery.

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21. Selection Considerations

When selecting the MPL-B4530F-SK74AA, several engineering factors should be considered.

Load Torque

The motor’s continuous torque must be sufficient for the machine’s actual continuous load.

The peak torque requirement should also be checked during acceleration, deceleration, and transient load conditions.

Load Inertia

The load inertia should be evaluated relative to the motor rotor inertia.

A very large load-to-motor inertia ratio can affect servo response and tuning.

Speed

The application should be checked against the 3000 rpm rated-speed class.

If the machine requires substantially higher operating speed, a higher-speed MPL configuration may be more appropriate.

Brake Requirement

If the motor must mechanically hold a vertical or gravity-loaded axis, the integrated brake is an important feature.

The brake should not simply be treated as a substitute for normal servo deceleration.

Coupling

Because the SK74AA has a keyless shaft, the selected coupling should be mechanically compatible with a keyless shaft arrangement.

Connector Clearance

The rear connector arrangement should be considered during machine layout.

The 180° rotational capability provides flexibility, but adequate space must still be provided for cable installation and service.

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22. Recommended Machine Types

The MPL-B4530F-SK74AA can be considered for the following machine categories:

Machine Type	Suitability	Typical Servo Function
Packaging Machine	Excellent	Indexing, feeding, positioning
Pick-and-Place Machine	Excellent	High-speed positioning
Assembly Machine	Excellent	Component positioning
Indexing Machine	Excellent	Rotary indexing
Conveyor System	Good	Speed synchronization
Material Handling	Good	Transfer and positioning
Printing Equipment	Good	Feed and registration
Converting Equipment	Good	Web and roller control
Machine Tool Auxiliary Axis	Good	Positioning and feed
Vertical Positioning Axis	Good	Lift and hold
Automated Fixture	Excellent	Clamping and positioning
Rotary Indexing Table	Excellent	Indexing and positioning

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23. Why Choose the MPL-B4530F-SK74AA?

The MPL-B4530F-SK74AA is a particularly balanced servo motor configuration.

It is not simply a high-speed motor or a high-torque motor. Instead, it combines several features that are valuable in industrial machine design.

The 3000 rpm operating class is suitable for many general-purpose servo axes.

The 130 mm frame and 76.2 mm stack provide a compact but capable mechanical package.

The low-inertia design helps the motor respond quickly.

The high-resolution single-turn encoder provides accurate feedback.

The keyless shaft supports precision coupling arrangements.

The integrated 24 V DC brake provides additional mechanical holding capability.

The right-angle rotating connector can make machine installation and cable routing easier.

Together, these characteristics make the motor a practical choice for many automated machines.

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24. Main Advantages at a Glance

Advantage	Description
Low Inertia	Supports fast acceleration and deceleration
3000 rpm Speed	Suitable for many general industrial motion axes
8.25 N·m Continuous Torque	Suitable for medium-duty motion applications
20.3 N·m Peak Torque	Provides additional short-duration acceleration capability
High-Resolution Feedback	Supports precise motion control
Single-Turn Absolute Encoder	Provides absolute position information within one revolution
Keyless Shaft	Suitable for compatible precision coupling systems
24 V DC Brake	Provides holding capability
130 mm Frame	Compact industrial mechanical size
76.2 mm Stack	Provides useful torque capability
Right-Angle Connector	Helps simplify cable routing
180° Connector Rotation	Improves installation flexibility
IEC Metric Mounting	Convenient for metric machine construction

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25. Product Selection Summary

The MPL-B4530F-SK74AA can be summarized as a 130 mm-frame, 3000 rpm, low-inertia AC servo motor with approximately 8.25 N·m continuous stall torque, approximately 20.3 N·m peak stall torque, single-turn high-resolution absolute feedback, a keyless shaft, and an integrated 24 V DC holding brake.

Its approximately 76.2 mm magnet stack gives it a useful balance of physical size and torque capability.

Its approximately 3.09 kg listed weight also makes it relatively manageable from a mechanical installation standpoint compared with larger high-torque servo motors.

For a machine requiring accurate positioning but not extreme torque, this motor can provide a very practical combination of speed, torque, feedback, and mechanical flexibility.

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26. Final Technical Summary

Category	MPL-B4530F-SK74AA
Brand	Allen-Bradley
Series	MP-Series MPL
Motor Type	Low-Inertia AC Rotary Servo Motor
Voltage Class	400 V
Armature Voltage	460 V
Frame Size	130 mm
Magnet Stack	76.2 mm
Rated Speed	3000 rpm
Continuous Stall Torque	Approx. 8.25 N·m
Peak Stall Torque	Approx. 20.3 N·m
Continuous Power	Approx. 2.1 kW
Rotor Inertia	Approx. 0.00040 kg·m²
Feedback	Single-turn high-resolution absolute encoder
Encoder	1024 Sin/Cos cycles/revolution
Protocol	Hiperface
Shaft	Keyless
Shaft Seal	None
Brake	24 V DC holding brake
Connector	SpeedTEC DIN, right-angle
Connector Rotation	180°
Mounting	IEC metric
Mounting Holes	Free mounting holes / Type FF
Approx. Weight	3.09 kg
Main Application	Industrial motion control
Primary Strength	Fast, precise, low-inertia servo motion with integrated holding brake

27. Conclusion

The MPL-B4530F-SK74AA is a versatile industrial servo motor designed around a practical combination of low inertia, moderate-to-high torque capability, high-resolution feedback, compact mechanical dimensions, and integrated braking.

Its 3000 rpm rating makes it suitable for a broad range of automated machinery.

Its single-turn high-resolution encoder supports accurate servo feedback and positioning.

Its keyless shaft is well suited to machines using compatible precision couplings.

Its 24 V DC holding brake makes the SK74AA version especially useful when the machine needs additional holding capability after motion stops.

Its 130 mm frame and 76.2 mm magnet stack provide a useful middle ground between compact machine dimensions and meaningful torque output.

For packaging machinery, indexing systems, automated assembly equipment, pick-and-place machines, material handling equipment, positioning systems, printing machinery, and other industrial automation equipment, the MPL-B4530F-SK74AA can be a strong choice when its torque, speed, inertia, brake, feedback, and mechanical interface requirements match the machine design.