Introduction

The Allen Bradley MPL-A330P-SK72AA Servo Motor is a compact low-inertia brushless servo motor designed for industrial motion systems that demand fast response and precise control. It belongs to the MP-Series MPL family and combines a 100 mm frame, 76.2 mm magnet stack, 5,000 RPM speed capability, and high-resolution single-turn feedback in a compact package.

Low inertia is especially valuable in applications where the motor must repeatedly accelerate, decelerate, and reposition. Packaging machines, assembly equipment, indexing mechanisms, and pick-and-place systems can perform hundreds or thousands of motion cycles during a production shift. In these environments, motor response has a direct influence on machine productivity.

The high-resolution feedback system is another important feature. The motor continuously provides position and speed information to the servo controller, allowing the control system to make corrections during operation. This closed-loop behavior is essential for applications where positioning accuracy and repeatability are critical.

The keyless shaft extension makes this configuration different from keyed versions within the MPL family. Mechanical coupling compatibility should therefore be confirmed carefully during replacement. A motor with the same frame size but a different shaft configuration may not be a suitable substitute.

The motor also uses a right-angle SpeedTEC DIN connector with flexible orientation. This can simplify cable routing and help reduce installation difficulties in compact machine designs.

Another important characteristic is the absence of an integral brake. For vertical-axis or load-holding applications, the machine designer must provide an appropriate external holding strategy rather than relying on the servo motor itself to maintain position when power is removed.

For maintenance teams, accurate model identification is essential. The MPL-A330P-SK72AA differs from similar MPL motors in feedback, shaft, brake, and connector configuration. Matching only the general MPL series or 100 mm frame size is not sufficient when selecting a replacement.

Technical Specifications

Specification	Details
Brand	Allen Bradley
Manufacturer	Rockwell Automation
Product Family	MP-Series MPL
Model	MPL-A330P-SK72AA
Product Type	AC Servo Motor
Motor Type	Low-Inertia Brushless Servo Motor
Voltage Class	230 V AC
Frame Size	100 mm
Frame	3
Magnet Stack Length	76.2 mm (3.00 in.)
Rated Speed	5,000 RPM
Maximum Speed	5,000 RPM
Continuous Output Torque	4.18 N·m
Peak Output Torque	11.10 N·m
Continuous Power	1.80 kW
Feedback	Single-Turn High-Resolution Encoder
Feedback Protocol	Hiperface
Encoder Resolution	1024 cycles/rev Sin/Cos
Shaft Type	Keyless Shaft Extension
Brake	No Brake
Connector	SpeedTEC DIN, Right Angle
Connector Orientation	180° Rotatable
Mounting	IEC Metric, Free Mounting Holes
Housing	IP50
Dimensions	Frame Size: 100 mm
Weight	4.60 kg (10.14 lb)
Application	Industrial Motion Control

Weight: 4.60 kg (10.14 lb)

The supplied product information provides the frame size rather than complete overall motor dimensions. Therefore, no unsupported overall length, width, or height has been added.

Recommended Related Models

For Allen Bradley MP-Series MPL servo applications, the following models are useful related references:

Allen Bradley MPL-A310P-SK72AA – Servo Motor
Allen Bradley MPL-A320P-SK72AA – Servo Motor
Allen Bradley MPL-A330P-SJ72AA – Servo Motor
Allen Bradley MPL-A330P-SJ74AA – Servo Motor
Allen Bradley MPL-A330P-MK74AA – Servo Motor

These models may share similar frame or performance characteristics but can differ in shaft design, feedback configuration, brake options, and connector arrangements. Complete compatibility should be checked before replacement.

Popular Related Models

For customers maintaining Allen Bradley motion-control systems, the following MPL servo motors are also useful related products:

Allen Bradley MPL-A310P-SJ72AA – Servo Motor
Allen Bradley MPL-A320P-SJ72AA – Servo Motor
Allen Bradley MPL-A330P-SJ72AA – Servo Motor
Allen Bradley MPL-A330P-SJ74AA – Servo Motor
Allen Bradley MPL-A430P-SJ74AA – Servo Motor

When sourcing the Allen Bradley MPL-A330P-SK72AA Servo Motor, always provide the complete catalog number. The SK72AA configuration is especially important because it specifies the keyless shaft, single-turn high-resolution feedback, right-angle SpeedTEC DIN connector, and no-brake arrangement. Accurate matching with the servo drive, feedback system, and mechanical coupling is essential for reliable installation and commissioning.

Applications

The Allen Bradley MPL-A330P-SK72AA Servo Motor is a low-inertia brushless AC servo motor designed for demanding industrial motion-control applications. Its compact 100 mm frame and responsive motor design make it well suited to machines that require rapid acceleration, precise positioning, and repeatable high-speed operation.

With a 5,000 RPM operating capability, high-resolution single-turn feedback, and a keyless shaft configuration, this servo motor can support a wide range of automated equipment where dynamic response and accurate motion are important.

Typical applications include:

Automated assembly machinery
Packaging and labeling systems
Pick-and-place equipment
Material handling systems
Precision indexing machines
Printing and converting equipment
Machine tools
Electronics manufacturing equipment
Automated production lines
High-cycle positioning systems
Robotic auxiliary axes
Industrial servo replacement projects

The MPL-A330P-SK72AA is particularly suitable for applications requiring frequent acceleration and deceleration. Its low-inertia construction allows the motor to respond quickly to servo commands, helping machine builders achieve shorter motion cycles and more consistent positioning.

Advantages

Low-inertia dynamic performance
The MPL-A330P-SK72AA is designed for fast changes in rotational speed, making it suitable for high-cycle motion systems where response time matters.

5,000 RPM capability
Its high-speed operation supports machinery requiring fast rotary movement and efficient cycle times.

High-resolution feedback
The single-turn high-resolution encoder provides detailed feedback to the servo controller, supporting accurate closed-loop motion and repeatable positioning.

Compact 100 mm frame
The 100 mm frame size provides a practical combination of performance and installation efficiency for space-conscious machine designs.

230 V AC servo platform
The motor is designed for compatible 230 V-class Allen Bradley motion-control systems.

Keyless shaft extension
The keyless shaft configuration provides a clean mechanical interface for compatible coupling arrangements and simplifies integration where the machine is designed around this shaft type.

No integrated brake
The no-brake configuration is useful for applications where the machine uses an independent holding or stopping solution.

Flexible connector arrangement
The right-angle SpeedTEC DIN connector can be rotated through 180 degrees, helping machine builders route motor cables efficiently within confined equipment spaces.

Useful for replacement projects
For installed MP-Series motion systems, the MPL-A330P-SK72AA can provide a practical replacement solution when the original motor needs to be renewed.

Technical FAQs

1. What type of motor is the Allen Bradley MPL-A330P-SK72AA?
It is a low-inertia brushless AC rotary servo motor from the Allen Bradley MP-Series MPL family.

2. What voltage class does the MPL-A330P-SK72AA use?
The motor is designed for the 230 V AC class and must be paired with a compatible servo drive.

3. What is the maximum speed of the motor?
The MPL-A330P-SK72AA is designed for operation up to 5,000 RPM.

4. What feedback technology does this servo motor use?
It uses a single-turn high-resolution encoder for closed-loop position and speed feedback.

5. Does the MPL-A330P-SK72AA include a holding brake?
No. This specific configuration is supplied without a brake.

6. What is the benefit of a low-inertia servo motor?
Lower rotor inertia allows faster acceleration and deceleration, which can improve machine response in high-cycle positioning applications.

7. What can cause excessive servo-motor vibration?
Possible causes include poor servo tuning, mechanical resonance, incorrect coupling alignment, unstable feedback, mounting problems, damaged bearings, or an improperly matched mechanical load.

8. What can cause the motor to overheat?
Excessive load, frequent high-acceleration cycles, mechanical binding, inadequate cooling, incorrect drive settings, or operation outside the intended duty conditions can increase motor temperature.

9. What should be checked if the motor does not rotate after a run command?
Check the servo enable state, active drive alarms, motor power connections, feedback wiring, command signals, motor configuration, and any mechanical restrictions.

10. What should be verified before replacing an MPL-A330P-SK72AA?
Confirm the complete motor catalog number, voltage class, frame size, magnet-stack length, feedback type, shaft configuration, connector arrangement, brake option, and compatibility with the installed servo drive.

Look forward to your comments!Comment