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MPL-B330P-HK72AA Servo Motor — Detailed Product Information and Technical Specifications

1. Product Overview

The MPL-B330P-HK72AA is a high-speed, low-inertia brushless servo motor designed for industrial motion-control systems that require fast acceleration, accurate positioning, stable speed regulation, and repeatable machine movement.

The motor belongs to the MP-Series MPL low-inertia servo motor family and uses a 400 V-class electrical configuration. It has a 100 mm frame size and a 76.2 mm magnetic stack length, giving it a compact mechanical format for its performance class.

The motor is rated for approximately 5000 rpm, making it suitable for high-speed machine axes, indexing systems, positioning mechanisms, packaging equipment, assembly machinery, material-handling systems, and other automated equipment where rapid motion is required.

The MPL-B330P-HK72AA uses a 2000-line incremental encoder for motor feedback. The encoder allows the servo control system to monitor motor movement and maintain closed-loop control of position and speed.

Unlike brake-equipped versions of the same general motor family, the MPL-B330P-HK72AA is configured without a holding brake. This makes it appropriate for applications where the motor does not require an integrated mechanical holding function or where the machine uses another method of load holding.

Another distinctive characteristic is the keyless shaft configuration. The absence of a conventional shaft key provides a different mechanical coupling arrangement and can be advantageous when the machine is designed around a suitable keyless coupling or clamping connection.

The motor uses a right-angle circular DIN-style SpeedTEC connector arrangement. The connector can be rotated to provide flexibility for cable routing and machine installation.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Brushless Servo Motors
Model	MPL-B330P-HK72AA
Motor Type	Brushless AC Permanent-Magnet Servo Motor
Application	Industrial Motion Control
Voltage Class	400 V AC Class
Nominal Voltage Class	460 V AC
Frame Size	100 mm
Magnetic Stack Length	76.2 mm
Rated Speed	5000 rpm
Feedback	2000-Line Incremental Encoder
Brake	No Brake
Shaft	Keyless Shaft Extension
Shaft Seal	No Shaft Seal
Connector	SpeedTEC DIN, Right-Angle
Connector Rotation	Approximately 180°
Mounting	IEC Metric
Motor Design	Low-Inertia

The MPL series is designed for applications where servo response and high-speed operation are important.

The low-inertia construction allows the motor to accelerate and decelerate rapidly when correctly matched to the machine load.

The B330P performance class provides a useful balance between motor size and torque capability. It is larger than lower-capacity B310P and B320P motors while remaining smaller than the higher-torque B420P and B430P classes.

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3. Detailed Technical Parameters

Parameter	MPL-B330P-HK72AA
Model	MPL-B330P-HK72AA
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motor
Motor Type	Brushless Permanent-Magnet AC Servo
Voltage Class	400 V AC
Nominal Voltage Class	460 V AC
Rated Speed	5000 rpm
Continuous Stall Torque	Approx. 4.18 N·m
Peak Torque	Approx. 11.1 N·m
Rated Output Power	Approx. 1.8 kW
Rated Current Class	Approx. 6.1 A
Feedback Type	Incremental Encoder
Encoder Resolution	2000 lines/revolution
Brake	None
Shaft Configuration	Keyless
Shaft Seal	None
Frame Size	100 mm
Magnetic Stack Length	76.2 mm
Magnetic Stack Length	3.0 in
Rotor Inertia	Approx. 0.00012 kg·m²
Connector	SpeedTEC DIN
Connector Style	Right-Angle
Connector Rotation	Approx. 180°
Mounting Flange	IEC Metric
Mounting Hole Style	Free Mounting Holes
Enclosure / Shaft Configuration	No Shaft Seal
Approximate Weight	4.60 kg
Servo Type	Low-Inertia Rotary Servo
Control Type	Closed-Loop Servo Control
Typical Operating Class	High-Speed Industrial Motion

The motor provides approximately 4.18 N·m of continuous torque and approximately 11.1 N·m of peak torque.

The continuous torque rating represents the approximate torque level that the motor can provide during continuous operation under appropriate thermal and operating conditions.

The peak torque capability is significantly higher than the continuous torque capability and is intended for short-duration dynamic requirements such as acceleration, deceleration, indexing, and rapid direction changes.

The rated output power is approximately 1.8 kW, placing this motor in the medium-power range of the high-speed MPL servo family.

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4. Dimensions and Mechanical Specifications

The MPL-B330P-HK72AA uses a 100 mm frame size and a 76.2 mm magnetic stack length.

Mechanical Parameter	Specification
Model	MPL-B330P-HK72AA
Frame Size	100 mm
Frame Size in Inches	Approx. 3.94 in
Magnetic Stack Length	76.2 mm
Stack Length in Inches	3.0 in
Shaft Type	Keyless
Shaft Seal	None
Mounting Standard	IEC Metric
Mounting Hole Type	Free Mounting Holes
Connector Arrangement	Right-Angle
Connector Rotation	Approx. 180°
Brake Housing	Not Applicable
Approximate Weight	4.60 kg

The 100 mm frame size provides the primary dimensional classification for the motor.

The 76.2 mm magnetic stack length identifies the motor’s stack configuration and is useful when comparing different MPL motor variants.

The complete overall envelope of a servo motor includes more than the frame and stack dimensions. Shaft projection, flange geometry, connector position, connector clearance, and other mechanical features also need to be considered during machine design.

For a direct mechanical replacement, the complete mechanical drawing should be checked for the exact shaft dimensions, mounting-hole dimensions, flange dimensions, motor length, connector clearance, and installation envelope.

The motor weighs approximately 4.60 kg, which should be included in machine structural calculations, particularly when the motor is mounted on a moving axis.

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5. Motor Performance

The MPL-B330P-HK72AA is designed around a high-speed, low-inertia motor structure.

Its rated speed of approximately 5000 rpm makes it suitable for machines requiring fast rotary movement.

A 5000 rpm servo motor can provide high machine speed while also allowing the mechanical transmission ratio to be selected according to the application.

The motor’s low rotor inertia is approximately 0.00012 kg·m².

Low rotor inertia is particularly useful when the machine frequently changes speed.

For example, a machine performing a repetitive indexing operation may accelerate rapidly, reach its commanded speed, decelerate, stop, and then reverse direction.

A low-inertia motor can respond efficiently to these changes when the motor and load inertia are properly matched.

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6. Encoder and Feedback System

The MPL-B330P-HK72AA uses a 2000-line incremental encoder.

The encoder provides feedback information to the servo drive so that the control system can determine motor movement.

The feedback system is used for:

• Position control
• Speed regulation
• Motion synchronization
• Acceleration control
• Deceleration control
• Repeatable indexing
• Error correction
• Closed-loop operation

In an industrial servo system, feedback is a major part of the control loop.

The servo drive continuously uses feedback information to regulate motor operation according to the commanded motion profile.

This makes the motor suitable for applications where open-loop motor control would not provide sufficient positioning accuracy or dynamic response.

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7. Keyless Shaft Configuration

One of the notable characteristics of the MPL-B330P-HK72AA is the keyless shaft.

Unlike a keyed shaft, the keyless shaft does not use a traditional shaft key to transmit torque.

This configuration is normally paired with an appropriate mechanical coupling or clamping arrangement designed for a keyless shaft.

A properly selected coupling can provide a rigid connection between the motor and the driven machine component.

Potential advantages of a keyless arrangement include:

• Flexible coupling selection
• Smooth shaft surface
• Convenient coupling installation
• Reduced dependence on shaft-key dimensions
• Suitable connection for clamping-style couplings
• Compact mechanical integration

When replacing a keyed servo motor with this model, the mechanical coupling must be checked carefully.

A motor with a different shaft configuration should not be considered a direct mechanical replacement simply because the frame size and power rating are similar.

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8. No Integrated Brake

The MPL-B330P-HK72AA is configured without an integrated holding brake.

This makes it suitable for applications where a holding brake is not required.

A non-brake motor can be advantageous when:

• The axis is horizontal
• The load does not move under gravity
• The machine has an independent mechanical brake
• A gearbox provides sufficient holding resistance
• A separate locking mechanism is used
• The application does not require shaft holding when power is removed

For vertical axes or gravity-loaded mechanisms, the absence of an integrated brake must be considered during machine design.

A servo motor without a holding brake should not be used as the sole means of mechanically supporting a suspended load unless the complete machine design specifically provides an appropriate alternative holding mechanism.

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9. Connector Configuration

The motor uses a right-angle SpeedTEC DIN connector.

The right-angle arrangement is useful in compact machine installations because it can reduce the amount of straight-line clearance required behind the motor.

The connector is also designed to provide rotational flexibility, allowing the cable exit direction to be adjusted.

This can simplify cable routing in:

• Packaging machinery
• Assembly machines
• Compact automation systems
• Multi-axis equipment
• Robotic machinery
• Machine tools
• Inspection equipment
• Material-handling systems

Cable routing should be planned carefully to avoid excessive bending, mechanical tension, or interference with moving machine components.

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10. Product Applications

10.1 Packaging Machinery

Packaging equipment often requires rapid and repeatable servo movement.

The MPL-B330P-HK72AA can be used for machine axes that perform:

• Product indexing
• Film feeding
• Rotary positioning
• Cutting movement
• Sealing movement
• Conveyor synchronization
• Product transfer
• High-speed positioning

The 5000 rpm rated speed is particularly useful for machines with short cycle times.

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10.2 Automated Assembly Equipment

Assembly machinery requires precise movement of tools, fixtures, components, and workpieces.

The motor can be used for:

• Linear positioning
• Rotary positioning
• Screw-driving mechanisms
• Transfer mechanisms
• Pick-and-place systems
• Component insertion
• Indexing tables
• Automated fixture positioning

The encoder feedback supports repeatable servo positioning when the motor is correctly integrated with the servo control system.

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10.3 Material Handling

Material-handling systems often require rapid movement between defined positions.

The motor can be applied to:

• Transfer axes
• Conveyor mechanisms
• Positioning axes
• Sorting mechanisms
• Product handling systems
• Automated loading systems
• Rotary transfer equipment

The absence of a built-in brake makes the model particularly suitable for non-gravity-loaded axes or systems where a separate mechanical holding mechanism is already provided.

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10.4 Machine Tools

The motor can be used in machine-tool applications requiring controlled rotary or linear motion.

Typical applications can include:

• Feed axes
• Positioning systems
• Tool movement
• Indexing mechanisms
• Auxiliary rotary axes
• Automated loading systems

The motor’s high speed and low inertia can support fast positioning cycles.

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10.5 Printing and Converting Machinery

Printing and converting systems often require coordinated rotary motion.

Possible applications include:

• Roll positioning
• Feed systems
• Web handling
• Cutting mechanisms
• Indexing mechanisms
• Registration-related motion
• Material transfer

The motor can be used where accurate speed and position control are required.

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10.6 Inspection Systems

Automated inspection equipment often requires rapid movement between inspection positions.

The motor can drive:

• Inspection tables
• Rotary fixtures
• Camera positioning systems
• Test stations
• Linear stages
• Product indexing mechanisms

The closed-loop feedback system allows the servo controller to maintain controlled motion during repeated inspection cycles.

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11. Advantages of the MPL-B330P-HK72AA

11.1 High-Speed Operation

The motor provides approximately 5000 rpm rated speed.

This makes it suitable for applications where rapid rotary movement is required.

High motor speed can also provide flexibility when selecting gear ratios, pulley sizes, screw pitches, and other transmission parameters.

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11.2 Low-Inertia Construction

The low-inertia design is one of the main characteristics of the MPL product family.

A lower rotor inertia can reduce the torque required to accelerate the motor itself.

This is especially beneficial for:

• Frequent start-stop cycles
• Rapid indexing
• Short machine cycles
• Repetitive positioning
• High-speed acceleration
• Rapid direction changes

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11.3 Strong Peak Torque Capability

The approximately 11.1 N·m peak torque capability provides additional torque during short-duration acceleration and transient operating conditions.

This allows the motor to handle dynamic machine movement more effectively than a motor selected only around its continuous torque requirement.

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11.4 1.8 kW Power Class

The approximately 1.8 kW output power makes the B330P suitable for a wide range of medium-duty automated machine axes.

It provides more power than the smaller B310P and B320P models while maintaining the high-speed characteristics of the MPL family.

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11.5 Compact 100 mm Frame

The 100 mm frame provides a practical combination of physical size and motor performance.

This can be useful where the available machine space is limited.

The compact form factor is particularly useful for multi-axis machines where several servo motors must be installed close together.

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11.6 Keyless Shaft

The keyless shaft provides flexibility for coupling arrangements based on clamping or other keyless transmission methods.

This can simplify mechanical integration when the machine is already designed around keyless couplings.

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11.7 No Brake Configuration

The absence of an integrated brake can be an advantage for applications that do not need a brake.

It can reduce unnecessary components and allows the machine builder to use a separate holding or braking mechanism if required.

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11.8 Flexible Connector Arrangement

The right-angle connector with rotational flexibility can simplify cable routing.

This is useful in machines with restricted rear clearance or complicated cable-management requirements.

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12. Typical Machine Configurations

Ball-Screw Axis

The motor can be coupled to a ball screw through a suitable keyless servo coupling.

The ball screw converts rotary motor movement into linear movement.

The motor is suitable for applications requiring:

• High linear speed
• Repeatable positioning
• Rapid acceleration
• Controlled deceleration
• High cycle frequency

The screw pitch and transmission ratio should be selected according to the required linear speed and motor operating range.

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Belt-Driven Linear Axis

The motor can drive a timing-belt system.

A belt-driven configuration can provide long travel distances and flexible machine layouts.

The motor’s high speed can be useful when a high linear velocity is required.

The belt ratio should be selected based on the required linear speed, acceleration, torque, and reflected inertia.

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Rotary Indexing System

The motor can be used directly or through a suitable transmission system for rotary indexing.

This is suitable for machines where the motor repeatedly moves to defined angular positions.

Typical examples include:

• Rotary tables
• Assembly indexing
• Inspection fixtures
• Product positioning
• Transfer mechanisms

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Conveyor and Transfer Mechanism

The motor can drive a conveyor or transfer mechanism when controlled acceleration and positioning are required.

The servo system can provide more precise motion than a basic constant-speed motor arrangement.

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13. Maintenance Considerations

Regular maintenance should include inspection of the motor housing, mounting points, shaft, coupling, connectors, and cables.

Abnormal vibration should be investigated because it can be caused by:

• Coupling misalignment
• Mechanical looseness
• Load imbalance
• Bearing wear
• Incorrect mounting
• Excessive radial load
• Excessive axial load

The motor should operate within the specified environmental and thermal conditions.

The connector should remain securely installed.

Feedback cables should be protected from unnecessary mechanical stress.

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

The motor shaft should not be subjected to excessive radial or axial loading.

The mounting structure should be sufficiently rigid to prevent vibration during rapid acceleration and deceleration.

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14. Motor Selection Considerations

When selecting the MPL-B330P-HK72AA for an application, the motor’s continuous torque should be compared with the actual continuous load torque.

The acceleration requirement should be evaluated separately.

A machine can have a relatively low continuous torque requirement but still require substantial peak torque during acceleration.

The load inertia should also be considered.

The servo motor’s rotor inertia is only one component of the complete dynamic system. The reflected inertia of the gearbox, pulley, screw, coupling, belt, and machine load must also be considered.

Important selection parameters include:

Selection Item	Requirement
Motor Voltage	Match the servo system
Continuous Torque	Must satisfy continuous load requirement
Peak Torque	Must satisfy acceleration/deceleration requirement
Rated Speed	Must satisfy machine speed requirement
Load Inertia	Must be compatible with servo system
Feedback	Must match the servo drive
Shaft Type	Keyless configuration must be mechanically compatible
Brake	None; external holding method may be required
Mounting	100 mm frame / IEC metric
Connector	Right-angle SpeedTEC DIN
Machine Weight Limit	Motor weight approx. 4.60 kg
Environment	Must satisfy application conditions
Duty Cycle	Must match thermal requirements

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15. Related MPL-B330P Models

The following models are closely related to the MPL-B330P-HK72AA and are useful for comparing different configurations within the same motor family.

Model	Series	Frame Size	Stack Length	Rated Speed	Continuous Torque	Peak Torque	Power	Brake	Approx. Weight
MPL-B330P-HJ72AA	MPL Low-Inertia	100 mm	76.2 mm	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	No Brake	Approx. 4.60 kg class
MPL-B330P-HJ74AA	MPL Low-Inertia	100 mm	76.2 mm	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	24 V DC Brake	Approx. 5.39 kg class
MPL-B330P-HK72AA	MPL Low-Inertia	100 mm	76.2 mm	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	No Brake	Approx. 4.60 kg
MPL-B330P-HK74AA	MPL Low-Inertia	100 mm	76.2 mm	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	24 V DC Brake	Approx. 5 kg class
MPL-B330P-SK72AA	MPL Low-Inertia	100 mm class	76.2 mm class	5000 rpm class	B330P class	B330P class	1.8 kW class	Configuration-dependent	Configuration-dependent

The MPL-B330P-HJ72AA is a closely related B330P configuration.

The MPL-B330P-HJ74AA is another particularly relevant comparison because it adds a 24 V DC holding brake.

The MPL-B330P-HK74AA is also closely related to the HK72AA configuration and provides a brake-equipped version of the same general B330P class.

The MPL-B330P-SK72AA represents another configuration within the same general B330P family and can be considered when different feedback or motor configuration requirements apply.

Exact substitution should always be based on the complete model code rather than only the B330P designation.

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16. Five Related MPL Series Models

The following five models are useful for comparing different torque and power levels within the MPL low-inertia servo family.

Model	Frame Class	Rated Speed	Continuous Torque	Peak Torque	Rated Power	Rotor Inertia	Approx. Weight
MPL-B310P	63 mm class	5000 rpm	1.58 N·m	3.61 N·m	0.77 kW	0.000044 kg·m²	2.7 kg
MPL-B320P	80 mm class	5000 rpm	3.05 N·m	7.91 N·m	1.5 kW	0.000078 kg·m²	3.7 kg
MPL-B330P	100 mm class	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	0.00012 kg·m²	4.6 kg
MPL-B420P	100 mm class	5000 rpm	4.74 N·m	13.5 N·m	1.9 kW	0.00026 kg·m²	4.3 kg
MPL-B430P	115 mm class	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	0.00038 kg·m²	5.5 kg

The MPL-B310P is a smaller low-inertia motor intended for lower torque requirements.

The MPL-B320P provides a higher torque level while retaining the 5000 rpm speed class.

The MPL-B330P is the performance family to which the HK72AA belongs and provides a useful balance between motor size, power, continuous torque, and peak torque.

The MPL-B420P provides a modest increase in continuous and peak torque.

The MPL-B430P provides a further increase in torque and is appropriate for applications requiring greater motor capacity.

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17. Five Same-Brand Popular Models for Comparison

The following models can be considered when comparing other motors from the same brand’s servo motor range.

Model	Product Type	Frame Class	Rated Speed	Continuous Torque	Peak Torque	Rated Power	Approx. Weight
MPL-B310P	Low-Inertia Servo Motor	63 mm class	5000 rpm	1.58 N·m	3.61 N·m	0.77 kW	2.7 kg
MPL-B320P	Low-Inertia Servo Motor	80 mm class	5000 rpm	3.05 N·m	7.91 N·m	1.5 kW	3.7 kg
MPL-B330P-HK72AA	Low-Inertia Servo Motor	100 mm	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	4.60 kg
MPL-B420P	Low-Inertia Servo Motor	100 mm class	5000 rpm	4.74 N·m	13.5 N·m	1.9 kW	4.3 kg
MPL-B430P	Low-Inertia Servo Motor	115 mm class	5000 rpm	6.55 N·m	19.8 N·m	2.2 kW	5.5 kg

These five models cover several common performance levels within the low-inertia servo motor range.

The B310P and B320P are suitable for lower-power axes.

The B330P provides a medium-power solution with high-speed operation.

The B420P provides additional torque while maintaining a similar 5000 rpm speed class.

The B430P provides still greater continuous and peak torque for more demanding applications.

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18. Detailed Comparison of B330P Variants

The B330P family includes several configurations that can appear similar from the outside but differ in mechanical or electrical options.

Model	Frame	Stack	Speed	Torque Class	Power	Feedback Configuration	Brake	Shaft Configuration
MPL-B330P-HJ72AA	100 mm	76.2 mm	5000 rpm	4.18 / 11.1 N·m	1.8 kW	2000-line incremental class	No Brake	Keyed
MPL-B330P-HJ74AA	100 mm	76.2 mm	5000 rpm	4.18 / 11.1 N·m	1.8 kW	2000-line incremental class	24 V DC Brake	Keyed
MPL-B330P-HK72AA	100 mm	76.2 mm	5000 rpm	4.18 / 11.1 N·m	1.8 kW	2000-line incremental class	No Brake	Keyless
MPL-B330P-HK74AA	100 mm	76.2 mm	5000 rpm	4.18 / 11.1 N·m	1.8 kW	2000-line incremental class	24 V DC Brake	Keyless

This comparison demonstrates why the complete model number matters.

The HJ and HK configurations can differ in shaft arrangement, while the 72 and 74 configurations distinguish brake arrangements.

For a replacement application, the mechanical shaft configuration is especially important.

A keyed motor and a keyless motor should not automatically be treated as interchangeable even when the frame size, speed, power, and torque are similar.

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19. Advantages in Industrial Automation

The MPL-B330P-HK72AA provides a combination of features that suits demanding automated machinery.

Its high-speed capability supports rapid machine cycles.

Its low rotor inertia supports quick acceleration and deceleration.

Its 1.8 kW power rating provides enough capacity for a broad range of medium-duty servo axes.

Its 4.18 N·m continuous torque rating provides useful sustained torque.

Its 11.1 N·m peak torque capability provides additional dynamic capacity.

The 100 mm frame allows relatively compact installation.

The 2000-line encoder provides closed-loop feedback.

The keyless shaft allows the motor to be paired with suitable keyless couplings.

The right-angle connector provides flexible cable routing.

The no-brake configuration makes it suitable for machines where an integrated brake is unnecessary.

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20. Advantages for Machine Designers

From a machine-design perspective, the motor can be useful when the application requires a combination of speed, response, and compact construction.

The 100 mm frame allows the motor to fit into a relatively compact installation envelope compared with larger servo motor classes.

The 5000 rpm rated speed can provide flexibility in mechanical transmission design.

The low-inertia rotor is useful for high-cycle equipment.

The keyless shaft can be integrated with clamping-type couplings.

The right-angle connector can help reduce cable-routing space requirements.

The lack of an integrated brake can also simplify applications where the machine does not require shaft holding.

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21. Installation Recommendations

Before installing the MPL-B330P-HK72AA, the mechanical and electrical requirements of the complete servo system should be checked.

The servo drive must be compatible with the motor’s voltage class and feedback system.

The mounting flange should be correctly aligned with the machine.

The motor should be securely mounted to a sufficiently rigid structure.

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

Because this model uses a keyless shaft, the coupling must be suitable for a keyless motor shaft.

The motor shaft should be aligned correctly with the driven mechanism.

Excessive radial or axial loading should be avoided.

The connector should have sufficient clearance for installation and maintenance.

The motor cable should be routed so that it does not interfere with moving machine components.

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22. Application Matching

Application Requirement	MPL-B330P-HK72AA Suitability
High-speed positioning	Excellent fit
Rapid indexing	Excellent fit
Horizontal servo axis	Excellent fit
Packaging machinery	Suitable
Assembly machinery	Suitable
Inspection equipment	Suitable
Rotary positioning	Suitable
Belt-driven axis	Suitable
Ball-screw axis	Suitable
Conveyor positioning	Suitable
Material handling	Suitable
Machine-tool auxiliary axis	Suitable
Vertical gravity-loaded axis	Requires separate holding solution
High-cycle automation	Suitable
Applications requiring integrated brake	Not the preferred configuration

The most important limitation to consider is the absence of an integrated holding brake.

For a vertical axis, lifting axis, or other gravity-loaded mechanism, the machine should have an appropriate external holding or safety mechanism.

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23. Maintenance Checklist

Inspection Item	Recommended Check
Motor Housing	Check for abnormal temperature or physical damage
Mounting Bolts	Check for looseness
Shaft	Check for abnormal wear or damage
Coupling	Check alignment and clamping condition
Bearings	Check for abnormal noise or vibration
Encoder Cable	Check insulation and mechanical condition
Power Cable	Check connectors and cable condition
Connector	Check secure connection
Machine Alignment	Check motor-to-load alignment
Vibration	Monitor for unusual changes
Operating Temperature	Check for abnormal heating
Servo Alarms	Review drive fault history
Brake	Not applicable to this model
Keyless Coupling	Check clamping condition
Machine Load	Check for unexpected increases

Regular inspection is particularly useful for high-cycle equipment because repeated acceleration and deceleration can place significant mechanical stress on couplings, mounting structures, and driven components.

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24. Recommended Related Models

For applications close to the MPL-B330P-HK72AA, the following models provide useful alternatives or comparison points:

Model	Main Difference / Use	Rated Speed	Continuous Torque	Peak Torque	Power	Weight
MPL-B310P	Smaller, lower-power option	5000 rpm	1.58 N·m	3.61 N·m	0.77 kW	2.7 kg
MPL-B320P	Lower-power intermediate option	5000 rpm	3.05 N·m	7.91 N·m	1.5 kW	3.7 kg
MPL-B330P-HJ72AA	Similar B330P class, keyed shaft	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	Approx. 4.60 kg
MPL-B330P-HJ74AA	B330P class with holding brake	5000 rpm	4.18 N·m	11.1 N·m	1.8 kW	Approx. 5.39 kg
MPL-B420P	Higher torque option	5000 rpm	4.74 N·m	13.5 N·m	1.9 kW	4.3 kg

The MPL-B330P-HJ72AA is particularly useful when a keyed shaft is preferred.

The MPL-B330P-HJ74AA is useful when a holding brake is required.

The MPL-B420P provides additional torque capacity for applications where the B330P torque range is insufficient.

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25. Product Specification Summary

Category	MPL-B330P-HK72AA
Brand	Allen-Bradley
Product Family	MP-Series
Product Series	MPL Low-Inertia Servo Motors
Motor Type	Brushless AC Servo Motor
Voltage Class	400 V AC
Nominal Voltage Class	460 V AC
Frame Size	100 mm
Stack Length	76.2 mm
Rated Speed	5000 rpm
Continuous Torque	Approx. 4.18 N·m
Peak Torque	Approx. 11.1 N·m
Rated Power	Approx. 1.8 kW
Feedback	2000-Line Incremental Encoder
Brake	No Brake
Shaft	Keyless
Shaft Seal	No Shaft Seal
Connector	SpeedTEC DIN Right-Angle
Connector Rotation	Approx. 180°
Mounting	IEC Metric
Rotor Inertia	Approx. 0.00012 kg·m²
Approximate Weight	4.60 kg
Main Application	Industrial Motion Control
Typical Machines	Packaging, Assembly, Material Handling, Inspection, Indexing, Machine Automation
Main Characteristics	High Speed, Low Inertia, Compact Frame, Closed-Loop Feedback

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26. Final Product Description

The MPL-B330P-HK72AA is a 100 mm-frame, high-speed low-inertia servo motor designed for industrial motion-control applications requiring approximately 1.8 kW of rated power, 4.18 N·m of continuous torque, 11.1 N·m of peak torque, and 5000 rpm rated speed.

Its 2000-line incremental encoder provides feedback for closed-loop servo control, while the low-inertia rotor supports rapid acceleration and deceleration.

The motor uses a 76.2 mm magnetic stack, a keyless shaft, and a right-angle SpeedTEC DIN connector. The keyless shaft makes the motor particularly suitable for machine designs using compatible clamping-type couplings.

Unlike brake-equipped versions, the MPL-B330P-HK72AA does not include an integrated holding brake. This configuration is well suited to horizontal axes and other applications where a mechanical holding brake is not required or where a separate holding mechanism is provided.

With its combination of high rotational speed, medium-power output, low inertia, encoder feedback, compact 100 mm frame, and flexible connector arrangement, the motor is suitable for packaging machinery, assembly systems, indexing equipment, material-handling machinery, inspection systems, machine tools, and general automated production equipment.

For a replacement or retrofit project, the complete motor configuration should be checked rather than selecting only by power rating. The shaft type, feedback configuration, mounting dimensions, connector arrangement, brake requirement, load inertia, continuous torque, peak torque, operating speed, and servo-drive compatibility all need to match the machine.