MPL-B430P-MK72AA Low-Inertia Servo Motor

1. Product Overview

The MPL-B430P-MK72AA is a high-performance low-inertia brushless AC servo motor designed for demanding industrial motion-control applications. It belongs to the MP-Series MPL family of low-inertia servo motors and is configured for high-speed operation, precise positioning, rapid acceleration, and reliable continuous-duty performance.

This model uses a 460 V-class AC supply, a 115 mm frame, a 76.2 mm magnetic stack length, and a rated speed of 5000 rpm. Its compact low-inertia construction allows the motor to respond quickly to command changes, making it suitable for machines where acceleration, deceleration, positioning accuracy, and dynamic response are important.

The MPL-B430P-MK72AA is equipped with an absolute multi-turn high-resolution encoder. The feedback system provides the motion controller with accurate rotor-position information and supports precise servo control across demanding motion profiles.

The motor uses a keyless shaft extension, a right-angle SpeedTEC DIN connector, and a connector arrangement that can be rotated through approximately 180 degrees. The motor is supplied without an integral brake, making it particularly suitable for applications where the machine uses an external holding mechanism or where a brake is not required.

Its IEC metric mounting arrangement and free mounting-hole configuration make it convenient for integration into industrial machine frames and servo-driven mechanical assemblies.

2. Brand and Series

3. Main Technical Parameters

4. Dimensions and Weight

The exact dimensional drawing should always be used when designing a machine enclosure, mounting plate, coupling, or motor guard. The primary dimensional information for this motor is based around the 115 mm IEC metric frame and 76.2 mm magnetic stack.

The 5.44 kg weight should be treated as an approximate product weight for equipment planning. Actual shipping weight can be higher because of packaging, cables, connectors, protective materials, and accessories.

5. Product Model Code Interpretation

The model designation contains useful information about the motor configuration.

The complete catalog number is:

MPL-B430P-MK72AA

This configuration is particularly useful when a machine requires a high-speed servo motor with absolute multi-turn feedback, a keyless shaft, and no integral holding brake.

6. Product Introduction

The MPL-B430P-MK72AA is designed around the concept of low rotor inertia combined with high dynamic performance.

In a servo system, motor inertia has a direct influence on acceleration and deceleration behavior. A lower-inertia motor can generally change speed more quickly when the drive commands a new motion profile. This is particularly valuable in machines that repeatedly start, stop, reverse, index, or reposition.

The 5000 rpm rated speed gives the motor a wide operating range for high-speed machine movements. At the same time, the approximately 6.55 N·m continuous torque rating provides useful continuous mechanical output for industrial positioning and motion applications.

The motor can also deliver substantially higher short-duration torque during acceleration or other dynamic events. The approximate peak torque rating is 19.8 N·m, allowing the motor to handle temporary increases in mechanical demand when correctly matched with the servo drive and mechanical load.

Another important feature is the absolute multi-turn encoder. Unlike a basic incremental feedback arrangement, an absolute multi-turn system can retain detailed position information across multiple revolutions. This is useful for machines where accurate position information is important during startup, indexing, synchronized movement, or complex coordinated motion.

7. Feedback System

The MPL-B430P-MK72AA uses a multi-turn high-resolution absolute feedback system.

The absolute feedback configuration is especially useful in automated machinery where the control system needs reliable position information rather than relying solely on incremental pulse counting.

For applications involving repeated indexing, rotary positioning, synchronized axes, electronic gearing, registration, and coordinated motion, accurate feedback can significantly improve the overall motion-control performance.

8. Shaft and Mechanical Configuration

The MPL-B430P-MK72AA uses a keyless shaft extension.

A keyless shaft is useful when the mechanical design uses a suitable clamp-type coupling or another compatible torque-transfer arrangement. It can provide a clean mechanical interface and is commonly used in applications where accurate coupling alignment and compact mechanical construction are important.

The absence of an integral shaft seal should also be considered when designing the surrounding machine environment. If the motor will be exposed to substantial dust, moisture, coolant, oil, or other contaminants, the complete motor and machine protection strategy should be evaluated before installation.

9. Connector Configuration

The motor is equipped with a right-angle SpeedTEC DIN connector.

The connector arrangement can be rotated approximately 180 degrees, which provides useful flexibility during machine integration.

This feature can be especially helpful in compact machine designs where cable routing space is limited. Instead of having the motor cable project into a fixed direction, the connector orientation can be selected to better suit the machine layout.

10. Brake Configuration

The MPL-B430P-MK72AA is configured with no integral motor brake.

This is important when selecting the motor for vertical-axis applications or machines where the motor must hold a load after power is removed.

For a horizontal axis, the absence of a brake may be perfectly suitable.

For a vertical axis, however, the machine designer should determine whether an external mechanical holding device, counterbalance, safety brake, or another load-holding solution is required.

11. Product Applications

The MPL-B430P-MK72AA is well suited to industrial machinery that requires a combination of high speed, fast response, accurate positioning, and reliable servo feedback.

Packaging Machinery

Packaging equipment frequently requires rapid acceleration and deceleration.

The low-inertia design can be beneficial for indexing, feeding, cutting, sealing, labeling, and synchronized packaging mechanisms.

Typical applications include:

• High-speed packaging machines
• Cartoning equipment
• Bagging systems
• Labeling machines
• Product indexing systems
• Filling equipment
• Conveyor synchronization
• Pick-and-place mechanisms
• Film feeding systems

Printing and Converting Machinery

Printing and web-processing machinery often requires accurate synchronization between several rotating axes.

The motor’s high-speed capability and absolute feedback make it suitable for applications involving:

• Web handling
• Roll positioning
• Printing registration
• Material feeding
• Slitting
• Rewinding
• Unwinding
• Tension-related motion systems
• High-speed indexing

In these applications, smooth speed control and accurate position feedback can be more important than simply achieving high motor power.

Material Handling

The motor can be used in automated material-handling equipment where fast positioning is required.

Potential applications include:

• Automated conveyors
• Transfer systems
• Indexing conveyors
• Sorting mechanisms
• Servo-driven rollers
• Automated positioning systems
• Robotic material transfer
• High-speed handling mechanisms

Assembly Machinery

Assembly equipment often requires multiple servo axes working together.

The MPL-B430P-MK72AA can be used for:

• Component positioning
• Press mechanisms
• Screw-driving systems
• Pick-and-place equipment
• Assembly indexing tables
• Precision feeding
• Automated inspection positioning
• Multi-axis assembly equipment

Machine Tools

The motor can also be used in selected machine-tool motion systems where the speed and torque requirements are within its operating range.

Possible applications include:

• Auxiliary axes
• Feed mechanisms
• Indexing axes
• Tool positioning
• Rotary positioning
• Automated machine mechanisms

The final selection should always be based on the actual load inertia, required acceleration, duty cycle, peak torque, continuous torque, and mechanical transmission.

12. Major Advantages

12.1 Low-Inertia Design

One of the most important advantages of the MPL family is its low-inertia design.

Lower rotor inertia allows the servo system to respond quickly to changes in command speed and position. This can reduce the time required for acceleration and deceleration and can be particularly valuable in high-cycle machinery.

12.2 5000 rpm High-Speed Operation

The 5000 rpm rating makes this motor suitable for applications requiring rapid rotary motion.

High-speed operation can help machine designers achieve shorter cycle times without necessarily increasing the physical size of the mechanical system.

12.3 High Continuous Torque for Its Size

The motor provides approximately 6.55 N·m of continuous torque while maintaining a relatively compact 115 mm frame configuration.

This combination of size, speed, and torque makes the motor useful for applications where machine space is limited but dynamic performance is still important.

12.4 High Peak Torque Capability

The approximately 19.8 N·m peak torque capability provides additional short-term torque for acceleration, rapid positioning, and transient load conditions.

This is particularly useful for machines that experience frequent changes in speed or direction.

12.5 Absolute Multi-Turn Feedback

The multi-turn absolute encoder is a major advantage for precision motion applications.

It can provide accurate position information across multiple motor revolutions, making the configuration suitable for advanced positioning and coordinated motion systems.

12.6 Keyless Shaft

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

It can be advantageous where the machine uses clamp-type couplings or other precision mechanical transmission components.

12.7 Flexible Connector Orientation

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

This is particularly useful when the motor is installed in a confined machine compartment or when cables must be routed around other equipment.

12.8 Compact Mechanical Design

The 115 mm frame and 76.2 mm magnetic stack provide a useful balance between motor output and physical size.

For automated machinery, reducing motor envelope can simplify mechanical layout and allow more compact machine construction.

13. Recommended Same-Series / Closely Related Models

The following models are useful comparison points within the same MPL family or closely related configurations. They should be treated as selection references rather than direct drop-in replacements, because differences in shaft, feedback, brake, connector, voltage, and mounting configuration can affect interchangeability.

Comparison Notes

The MPL-B430P-MK72AA is particularly distinguished by its combination of multi-turn absolute feedback, keyless shaft, no integral brake, and right-angle rotatable connector.

The MJ/MK and SJ/SK variants should not be considered identical simply because they share the same basic 430P motor family. The letter combinations identify different configuration options, so the complete catalog number should always be matched against the machine’s required feedback, shaft, brake, connector, and drive compatibility.

14. Five Popular Models from the Same Brand

The following models are useful alternatives or comparison products when evaluating servo systems from the same brand family.

These five models cover several useful points in the same general product ecosystem, from compact low-inertia motion to larger and higher-output servo applications.

15. MPL-B430P-MK72AA vs. Related 430P Models

16. Selection Advantages for Machine Builders

When selecting a servo motor for a new machine, the MPL-B430P-MK72AA offers a useful combination of characteristics.

The 5000 rpm speed rating makes it suitable for high-cycle machines.

The low rotor inertia makes it well suited to applications requiring rapid acceleration and deceleration.

The 6.55 N·m continuous torque class provides useful continuous mechanical output for medium-duty motion axes.

The 19.8 N·m peak torque class provides additional dynamic capability during short acceleration and transient-load conditions.

The absolute multi-turn feedback is advantageous for applications where accurate position information is important.

The keyless shaft can simplify mechanical coupling when a compatible clamp-type coupling is used.

The right-angle rotatable connector can make machine wiring and cable routing easier.

The 115 mm frame offers a practical balance between mechanical size and servo performance.

17. Typical Machine Functions

The MPL-B430P-MK72AA can be considered for the following machine functions:

18. Important Selection Considerations

Although the MPL-B430P-MK72AA is a capable servo motor, selecting a servo motor should not be based on rated power alone.

The mechanical load should be evaluated carefully.

Important factors include:

• Load torque
• Acceleration torque
• Deceleration torque
• Load inertia
• Motor-to-load inertia ratio
• Required cycle time
• Maximum operating speed
• Continuous operating torque
• Peak operating torque
• Duty cycle
• Gearbox ratio
• Coupling characteristics
• Vertical or horizontal axis
• Holding requirements
• Ambient temperature
• Installation environment
• Cable routing
• Feedback requirements
• Servo drive compatibility

For a high-speed axis, the relationship between the motor’s rotor inertia and the reflected load inertia is particularly important.

For a vertical axis, the absence of an integral brake must also be carefully considered.

19. Overall Product Advantages

The main strengths of the MPL-B430P-MK72AA can be summarized as follows:

1. High 5000 rpm operating speed for fast machine cycles.
2. Low-inertia motor construction for rapid acceleration and deceleration.
3. Approximately 6.55 N·m continuous torque for demanding industrial motion.
4. Approximately 19.8 N·m peak torque for short-duration dynamic loads.
5. Absolute multi-turn high-resolution feedback for accurate position control.
6. 115 mm frame size for a useful combination of output and machine footprint.
7. 76.2 mm magnetic stack providing the motor’s 430P performance class.
8. Keyless shaft design for compatible precision coupling systems.
9. Right-angle DIN connector for convenient cable routing.
10. 180° connector rotation for flexible mechanical installation.
11. IEC metric mounting for industrial machine integration.
12. No integral brake, providing a straightforward configuration for applications that do not require motor holding.
13. Suitable for high-cycle automation, including packaging, assembly, indexing, feeding, material handling, and other motion-control equipment.

20. Final Technical Summary

21. Conclusion

The MPL-B430P-MK72AA is a strong choice for industrial motion systems that require high rotational speed, low inertia, accurate feedback, and dependable servo performance in a relatively compact motor package.

Its combination of 5000 rpm speed, approximately 6.55 N·m continuous torque, approximately 19.8 N·m peak torque, 115 mm frame size, 76.2 mm magnetic stack, absolute multi-turn feedback, keyless shaft, and flexible right-angle connector makes it particularly suitable for high-speed automated machinery.

The motor is especially attractive for applications where fast acceleration and precise positioning are more important than simply maximizing motor power. Packaging machines, indexing equipment, material-handling systems, assembly machinery, web-processing equipment, and other automated production systems can all benefit from this type of low-inertia servo architecture.

For replacement or cross-selection work, the complete catalog number should always be matched carefully. Models that look similar within the MPL family may have different feedback systems, shaft arrangements, brake options, connector configurations, or mechanical dimensions. The MPL-B430P-MK72AA is specifically characterized by its multi-turn absolute feedback, keyless shaft, no integral brake, 115 mm frame, 76.2 mm stack, and 5000 rpm configuration.