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Allen-Bradley MPL-B330P-RK74AA Low-Inertia Servo Motor

1. Product Overview

The MPL-B330P-RK74AA is a low-inertia brushless AC rotary servo motor designed for high-speed motion control applications that require accurate positioning, rapid acceleration and deceleration, stable torque production, and reliable feedback control.

It belongs to the MPL Series low-inertia brushless servo motor family and uses a permanent-magnet rotor construction. The motor is designed around a 460 V class / 480 V AC servo system and has a rated speed of up to 5000 RPM.

The model uses a resolver feedback system, a keyless shaft extension, a right-angle SpeedTEC DIN connector, and a built-in 24 V DC holding brake. These features make the motor suitable for machine axes where both dynamic servo performance and motor holding capability are required.

The B330P motor frame is approximately 100 mm, with a 76.2 mm magnet stack length. The B330P family is rated at approximately 1.8 kW, with 4.18 Nm continuous stall torque and 11.1 Nm peak stall torque.

The RK74 configuration is particularly useful where a keyless shaft is preferred and a 24 V DC holding brake is required. The brake can provide holding capability when the servo axis is stopped or when the machine requires the motor to maintain its mechanical position under appropriate operating conditions.

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2. Basic Product Information

Parameter	Specification
Brand	Allen-Bradley
Product Series	MP-Series MPL
Product Family	Low-Inertia Brushless Servo Motors
Model	MPL-B330P-RK74AA
Motor Type	Brushless AC Rotary Servo Motor
Motor Construction	Permanent-Magnet Servo Motor
Voltage Class	460 V / 480 V AC class
Rated Speed	5000 RPM
Feedback	Resolver
Shaft Type	Keyless Shaft Extension
Brake	24 V DC Holding Brake
Connector	SpeedTEC DIN, Right Angle
Connector Rotation	180° Rotatable
Mounting	IEC Metric Flange Mounting
Frame Size	100 mm
Magnet Stack Length	76.2 mm
Rated Output	Approximately 1.8 kW
Continuous Stall Torque	4.18 Nm
Peak Stall Torque	11.1 Nm
Rotor Inertia	Approximately 0.00012 kg·m²
Approx. Motor Weight	Approximately 6.8 kg
Enclosure / Shaft	Keyless shaft extension; shaft seal configuration should be checked against the exact revision
Servo System	Suitable for compatible Kinetix-class servo drive systems

The exact model configuration identifies the motor as a 100 mm frame, 76.2 mm stack-length, 5000 RPM resolver motor with a keyless shaft, right-angle rotatable DIN connector, and 24 V DC brake.

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3. Product Model Interpretation

The model number MPL-B330P-RK74AA contains useful configuration information.

Model Section	Meaning
MPL	MPL low-inertia brushless servo motor family
B	Motor design / voltage-family designation
330	B330 frame and stack configuration
P	5000 RPM high-speed configuration
R	Resolver feedback
K	Keyless shaft extension
7	SpeedTEC DIN right-angle connector, rotatable configuration
4	24 V DC brake
AA	Product configuration / revision designation

The most important configuration difference between this motor and the closely related MPL-B330P-RK72AA is the brake configuration. The RK74 version includes a 24 V DC brake, while the RK72 configuration is the corresponding no-brake version. The B330P family also includes keyed-shaft and different feedback configurations.

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4. Detailed Technical Parameters

Technical Parameter	MPL-B330P-RK74AA
Model	MPL-B330P-RK74AA
Brand	Allen-Bradley
Series	MP-Series MPL
Motor Type	Brushless AC Servo Motor
Rated Voltage Class	460 V / 480 V AC
Rated Speed	5000 RPM
Continuous Stall Torque	4.18 Nm
Peak Stall Torque	11.1 Nm
Rated Output	1.8 kW
Rotor Inertia	0.00012 kg·m²
Frame Size	100 mm
Magnet Stack	76.2 mm
Feedback	Resolver
Shaft	Keyless
Brake	24 V DC
Connector	SpeedTEC DIN
Connector Style	Right Angle
Connector Rotation	180°
Mounting Standard	IEC Metric
Flange / Frame Class	100 mm
Maximum Speed	5000 RPM
Approx. Weight	6.8 kg
Primary Application	Industrial servo motion control

The core B330P performance figures are 5000 RPM, 1.8 kW, 4.18 Nm continuous stall torque, 11.1 Nm peak stall torque, and approximately 0.00012 kg·m² rotor inertia.

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5. Dimensions and Mechanical Information

The MPL-B330P-RK74AA uses a 100 mm frame size and a 76.2 mm magnet stack length.

The 100 mm frame corresponds to approximately 3.94 in., while the 76.2 mm magnet stack corresponds to approximately 3.00 in.

Mechanical Parameter	Specification
Model	MPL-B330P-RK74AA
Frame Size	100 mm
Frame Size, Imperial	Approx. 3.94 in.
Magnet Stack Length	76.2 mm
Magnet Stack Length, Imperial	Approx. 3.00 in.
Shaft Type	Keyless
Mounting	IEC Metric
Flange Configuration	Metric flange
Connector Orientation	Right angle
Connector Rotation	180°
Brake	Integrated 24 V DC brake
Approx. Weight	6.8 kg

The frame size and stack length should not be treated as the complete external envelope of the motor. Overall motor length, connector clearance, shaft projection, flange dimensions, and brake-related dimensions depend on the detailed mechanical drawing and exact product revision.

For machine design work, the complete dimensional drawing should therefore be checked before finalizing the motor mounting plate, coupling clearance, cable routing, or enclosure dimensions.

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6. Motor Performance

The MPL-B330P motor family is designed for applications where relatively high rotational speed and fast dynamic response are required.

The motor has a rated speed of 5000 RPM, allowing it to operate effectively in high-speed rotary applications. Its continuous stall torque is approximately 4.18 Nm, while the peak stall torque is approximately 11.1 Nm.

The difference between continuous and peak torque is important in servo applications. Continuous torque relates to the motor’s sustained torque capability under the applicable thermal conditions, while peak torque is intended for short-duration acceleration, deceleration, transient loading, and other dynamic operating conditions.

The B330P rotor inertia is approximately 0.00012 kg·m². This relatively low rotor inertia is one of the key characteristics of the MPL low-inertia motor design and supports rapid changes in motor speed when the servo system is correctly tuned.

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7. Resolver Feedback

The MPL-B330P-RK74AA uses a resolver for motor feedback.

The resolver provides the servo drive with information required to determine rotor position and control motor commutation. Resolver-based feedback is commonly used in industrial environments where a robust feedback device is desirable.

For machine builders, the resolver configuration can be useful in applications involving continuous operation, high motor speeds, repeated acceleration and deceleration, and industrial environments where feedback reliability is important.

The resolver also allows the servo drive to establish the motor’s electrical position so that the control system can regulate torque and speed appropriately. The exact drive configuration and feedback interface must match the selected servo controller.

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8. Keyless Shaft Design

The RK portion of the model identifies a keyless shaft configuration.

A keyless shaft can be useful when the machine uses a suitable clamp-style coupling, shrink-fit arrangement, or other compatible shaft connection.

Compared with a keyed shaft, a keyless configuration can simplify certain coupling arrangements and can provide a clean shaft interface when the mechanical transmission has been designed around a keyless connection.

However, the coupling method must be selected according to the mechanical load, shaft diameter, allowable radial load, allowable axial load, operating speed, acceleration, and manufacturer’s coupling requirements.

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9. 24 V DC Holding Brake

One of the most important features of the MPL-B330P-RK74AA is its 24 V DC brake.

The brake is intended primarily for holding the motor shaft when the servo motor is not actively producing torque. This can be useful for vertical axes, lifting mechanisms, indexing equipment, positioning systems, and machines where the axis needs additional mechanical holding capability.

The brake should not automatically be treated as the primary dynamic stopping device. Servo stopping, emergency stopping, and mechanical holding are separate functions and should be designed according to the machine’s safety requirements.

Brake Parameter	Specification
Model	MPL-B330P-RK74AA
Brake Type	Holding Brake
Brake Voltage	24 V DC
Brake Function	Shaft holding
Configuration	Integrated motor brake
Typical Use	Vertical axes, holding applications, positioning systems

The 24 V DC brake is explicitly identified in the product configuration for the RK74 model.

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10. SpeedTEC DIN Connector

The motor uses a right-angle SpeedTEC DIN connector with a rotatable configuration.

The connector can be rotated through approximately 180°, providing greater flexibility when installing the motor in confined machine spaces.

This feature can be particularly useful in machines where the motor is mounted close to guards, machine frames, linear modules, gearboxes, or other mechanical structures.

The right-angle connector also helps with cable routing by allowing the cable exit direction to be adjusted rather than forcing the cable to project straight out from the motor.

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11. Product Series

The MPL-B330P-RK74AA belongs to the:

MP-Series → MPL Series → Low-Inertia Brushless Servo Motor Family → B330P Motor Class

The MPL family contains several motor sizes and configurations designed for servo motion applications.

Within the B-series performance range, the B330P sits between the smaller B320P class and larger B420P / B430P classes.

Motor Family	Rated Speed	Continuous Torque	Peak Torque	Output
MPL-B310P	5000 RPM	1.58 Nm	3.61 Nm	0.77 kW
MPL-B320P	5000 RPM	3.05 Nm	7.91 Nm	1.5 kW
MPL-B330P	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW
MPL-B420P	5000 RPM	4.74 Nm	13.5 Nm	1.9 kW
MPL-B430P	5000 RPM	6.55 Nm	19.8 Nm	2.2 kW

These figures show the progression of torque and power across several MPL low-inertia motor classes.

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12. Product Applications

The MPL-B330P-RK74AA can be used in a wide range of industrial motion-control systems where controlled speed, accurate positioning, fast acceleration, and reliable holding capability are required.

CNC and Machine Tools

The motor can be applied to machine-tool axes where rapid positioning and controlled acceleration are important.

Typical applications can include feed axes, indexing mechanisms, rotary tables, auxiliary axes, and other machine-tool motion functions.

The 5000 RPM capability can be useful where the mechanical transmission is designed for relatively high motor speed.

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Packaging Machinery

Packaging machines frequently require rapid repetitive movements.

The low-inertia motor configuration can be useful for indexing, cutting, sealing, feeding, positioning, and synchronization mechanisms.

The integrated 24 V DC brake can also be beneficial on axes that need to remain mechanically held during machine stops or maintenance conditions.

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Material Handling Equipment

Servo motors are commonly used in controlled conveyor, positioning, indexing, and transfer systems.

The MPL-B330P-RK74AA can provide controlled acceleration and deceleration while the resolver supplies position feedback to the servo control system.

For vertical material-handling applications, the brake configuration can provide additional mechanical holding capability when properly integrated into the machine design.

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Robotics and Automated Machinery

The motor can be used in industrial automation equipment involving repeated point-to-point positioning.

Examples include automated transfer systems, rotary positioning equipment, indexing mechanisms, pick-and-place machinery, and automated assembly equipment.

The low-inertia design is particularly relevant where the machine requires frequent speed changes.

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Printing and Converting Equipment

Printing and converting machinery often requires accurate synchronization between multiple rotating or linear axes.

Servo motors can control roller systems, feeding mechanisms, tension-control systems, cutting mechanisms, and registration functions.

The 5000 RPM operating capability provides flexibility for high-speed rotating mechanisms when the motor and transmission are correctly selected.

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Semiconductor and Electronics Manufacturing Equipment

The motor can also be considered for precision automation equipment used in electronics production, inspection, handling, and assembly.

The resolver feedback system provides the servo controller with motor position information for closed-loop motion control.

Mechanical vibration, positioning accuracy, acceleration requirements, and environmental conditions should be evaluated during system design.

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13. Main Product Advantages

13.1 Low-Inertia Rotor

The low-inertia construction is one of the principal characteristics of the MPL series.

The B330P rotor inertia is approximately 0.00012 kg·m².

Lower rotor inertia allows the servo system to change motor speed rapidly when the drive, mechanical load, and control parameters are properly matched.

This makes the motor suitable for machines with frequent acceleration and deceleration cycles.

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13.2 High-Speed Operation

The motor provides a rated speed of 5000 RPM.

This makes it suitable for applications requiring fast rotary movement and high machine cycle rates.

The actual operating speed should always be selected according to the machine load, drive configuration, mechanical transmission, thermal conditions, and motor speed-torque characteristics.

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13.3 Strong Peak Torque Capability

The B330P family provides approximately 4.18 Nm continuous stall torque and 11.1 Nm peak stall torque.

The peak torque capability can be useful during acceleration, deceleration, short-duration overload conditions, and dynamic machine movements.

The actual available torque at a particular speed must be determined from the appropriate motor performance curves rather than from the stall torque value alone.

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13.4 Integrated Holding Brake

The RK74 configuration includes a 24 V DC holding brake.

This is a practical advantage for machine axes that need to maintain their position while servo torque is removed.

Typical examples include vertical mechanisms and positioning axes where the motor shaft must remain mechanically restrained.

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13.5 Keyless Shaft

The keyless shaft configuration provides compatibility with mechanical systems designed around keyless couplings.

This can be advantageous when a machine uses clamp-type coupling systems or other shaft interfaces specifically designed for keyless motor shafts.

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13.6 Flexible Connector Orientation

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

This gives machine builders additional flexibility when routing motor cables and designing compact machine layouts.

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13.7 Resolver Feedback

The resolver feedback system provides closed-loop motor position information.

Resolver-based systems are well suited to industrial servo applications requiring continuous feedback for speed, position, and torque control.

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14. Recommended Servo Drive Configuration

The MPL-B330P-RK74AA should be used with a compatible servo drive and motor-feedback configuration.

The servo drive must be configured for the appropriate motor family, feedback type, voltage class, motor parameters, brake operation, and applicable current limits.

The drive selection should not be based only on motor power.

The following factors should also be considered:

Selection Factor	Requirement
Motor Voltage	Must match the applicable servo drive class
Motor Power	Approximately 1.8 kW motor class
Continuous Torque	Approximately 4.18 Nm
Peak Torque	Approximately 11.1 Nm
Feedback	Resolver-compatible drive required
Brake	24 V DC brake control required
Rated Speed	Up to 5000 RPM
Mechanical Load	Must remain within allowable motor limits
Duty Cycle	Must satisfy thermal requirements
Acceleration	Must satisfy motor and drive peak-current capability

A compatible servo drive must be selected using the complete motor and drive selection data rather than relying solely on the motor’s nominal wattage.

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15. Five Related / Same-Series Models

The following models are closely related to the MPL-B330P-RK74AA and are useful for comparison when selecting a servo motor with similar mechanical and performance characteristics.

Model	Feedback	Shaft	Brake	Speed	Continuous Torque	Peak Torque	Output	Frame / Stack
MPL-B330P-RK72AA	Resolver	Keyless	No Brake	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	100 mm / 76.2 mm
MPL-B330P-RJ72AA	Resolver	Keyed	No Brake	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	100 mm / 76.2 mm
MPL-B330P-RJ74AA	Resolver	Keyed	24 V DC	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	100 mm / 76.2 mm
MPL-B330P-MK72AA	Absolute Multi-turn Encoder	Keyless	No Brake	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	100 mm / 76.2 mm
MPL-B330P-MJ74AA	Absolute Multi-turn Encoder	Keyed	24 V DC	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	100 mm / 76.2 mm

The B330P family includes multiple combinations of resolver or encoder feedback, keyed or keyless shaft configurations, and brake or no-brake versions.

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16. Five Representative Same-Brand Models

The following are representative Allen-Bradley MPL servo motor models that can be considered when comparing different torque, power, frame-size, or application requirements.

Model	Rated Speed	Continuous Torque	Peak Torque	Output	Rotor Inertia	Approx. Weight
MPL-B310P	5000 RPM	1.58 Nm	3.61 Nm	0.77 kW	0.000044 kg·m²	2.7 kg
MPL-B320P	5000 RPM	3.05 Nm	7.91 Nm	1.5 kW	0.000078 kg·m²	3.7 kg
MPL-B330P	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	0.00012 kg·m²	4.6 kg*
MPL-B420P	5000 RPM	4.74 Nm	13.5 Nm	1.9 kW	0.00026 kg·m²	4.3 kg
MPL-B430P	5000 RPM	6.55 Nm	19.8 Nm	2.2 kW	0.00038 kg·m²	5.5 kg

*The 4.6 kg value is the published generic B330P family weight. The exact RK74AA configuration is heavier because of its specific hardware configuration and is commonly listed at approximately 6.8 kg.

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17. Same-Brand Model Comparison

Model	Frame Class	Speed	Continuous Torque	Peak Torque	Output	Typical Selection Direction
MPL-B310P	Smaller	5000 RPM	1.58 Nm	3.61 Nm	0.77 kW	Lower-load, compact servo axes
MPL-B320P	Small/Medium	5000 RPM	3.05 Nm	7.91 Nm	1.5 kW	Medium-duty high-speed axes
MPL-B330P-RK74AA	100 mm	5000 RPM	4.18 Nm	11.1 Nm	1.8 kW	High-speed axis with brake and resolver
MPL-B420P	100 mm class	5000 RPM	4.74 Nm	13.5 Nm	1.9 kW	Higher torque requirement
MPL-B430P	115 mm class	5000 RPM	6.55 Nm	19.8 Nm	2.2 kW	Higher dynamic torque requirement

The progression illustrates how the motor selection can move toward a larger motor when the required continuous torque, peak torque, or mechanical load increases.

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18. Application Selection Guide

The MPL-B330P-RK74AA is particularly suitable when the machine requires a combination of:

• High operating speed
• Low rotor inertia
• Closed-loop servo control
• Resolver feedback
• Approximately 1.8 kW motor capacity
• Approximately 4.18 Nm continuous torque
• Short-duration peak torque up to approximately 11.1 Nm
• Keyless shaft connection
• 24 V DC holding brake
• Flexible right-angle motor connector
• Metric flange mounting

The motor is therefore a practical configuration for machine axes where the brake requirement makes a no-brake version unsuitable.

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19. Difference Between RK74AA and RK72AA

The two models are mechanically and electrically related, but the brake configuration is different.

Parameter	MPL-B330P-RK72AA	MPL-B330P-RK74AA
Feedback	Resolver	Resolver
Shaft	Keyless	Keyless
Speed	5000 RPM	5000 RPM
Continuous Torque	4.18 Nm	4.18 Nm
Peak Torque	11.1 Nm	11.1 Nm
Output	1.8 kW	1.8 kW
Frame	100 mm	100 mm
Stack	76.2 mm	76.2 mm
Brake	No Brake	24 V DC Brake
Connector	Right-angle DIN	Right-angle DIN
Primary Difference	No holding brake	Integrated holding brake

The RK74AA version is therefore the appropriate configuration when the machine requires a motor-mounted 24 V DC holding brake, while the RK72AA version is intended for applications that do not require that brake configuration.

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20. Difference Between RK74AA and RJ74AA

Another closely related configuration is the MPL-B330P-RJ74AA.

The primary mechanical difference is the shaft configuration.

Parameter	MPL-B330P-RK74AA	MPL-B330P-RJ74AA
Feedback	Resolver	Resolver
Shaft	Keyless	Keyed
Brake	24 V DC	24 V DC
Speed	5000 RPM	5000 RPM
Continuous Torque	4.18 Nm	4.18 Nm
Peak Torque	11.1 Nm	11.1 Nm
Output	1.8 kW	1.8 kW
Frame	100 mm	100 mm
Stack	76.2 mm	76.2 mm
Connector	Right-angle DIN	Right-angle DIN

If the mechanical system uses a keyless coupling, the RK74AA configuration is the relevant choice. If the machine transmission requires a traditional keyed shaft connection, the RJ74AA configuration is the corresponding alternative.

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21. Installation Considerations

Correct mechanical installation is important for servo motor performance.

The motor should be mounted on a rigid, accurately machined mounting surface. Excessive misalignment between the motor shaft and driven equipment can produce additional radial and axial loads.

The coupling should be correctly aligned, and the allowable shaft loading should be observed.

Cable routing should provide sufficient clearance around the right-angle connector. Because the connector is rotatable, its orientation can be selected to reduce cable bending and interference with surrounding machine components.

The 24 V DC brake wiring should be connected according to the applicable control architecture. The brake should not be treated as a replacement for the machine’s safety-rated stopping system.

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22. Maintenance Considerations

Routine inspection can help maintain reliable servo motor operation.

Recommended maintenance activities include:

• Inspecting motor mounting bolts.
• Checking coupling alignment.
• Checking the motor shaft and coupling for abnormal vibration.
• Inspecting feedback and motor cables.
• Checking connector condition.
• Checking brake operation.
• Monitoring abnormal motor noise.
• Monitoring unusual motor temperature.
• Checking for excessive shaft or bearing vibration.
• Inspecting the surrounding machine for mechanical overload.

For a servo motor, abnormal vibration or temperature should not automatically be attributed to the motor itself. Mechanical imbalance, coupling misalignment, excessive load, incorrect servo tuning, bearing problems, cable issues, and drive configuration can all produce similar symptoms.

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23. Troubleshooting Guide

Symptom	Possible Cause	Recommended Check
Motor does not rotate	Drive enable or wiring problem	Check drive status and motor connections
Position error	Feedback or tuning issue	Check resolver feedback and servo parameters
Excessive vibration	Misalignment or tuning issue	Check coupling alignment and servo tuning
Motor overheats	Excessive load or duty cycle	Check load torque and thermal conditions
Brake does not release	24 V brake circuit problem	Check brake supply and control wiring
Motor stops unexpectedly	Drive fault or overload	Check servo drive diagnostics
Excessive noise	Bearing, coupling, or mechanical issue	Inspect mechanical system
Position instability	Feedback or control issue	Check resolver wiring and control parameters
Poor acceleration	Insufficient drive capacity or excessive load	Check peak torque/current requirements
Cable interference	Connector orientation	Rotate connector and improve cable routing

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24. Advantages for Machine Builders

The MPL-B330P-RK74AA offers several practical advantages in machine design.

First, its 5000 RPM speed capability allows designers to build high-speed rotary motion into a relatively compact servo motor package.

Second, its low rotor inertia supports rapid dynamic response and makes it suitable for applications with frequent acceleration and deceleration.

Third, the 4.18 Nm continuous and 11.1 Nm peak torque levels provide a useful combination of continuous load capacity and short-duration dynamic torque.

Fourth, the integrated 24 V DC holding brake provides an additional mechanical holding function for appropriate machine axes.

Fifth, the resolver feedback provides a robust closed-loop feedback solution for industrial servo control.

Sixth, the keyless shaft can simplify integration with compatible clamp-style mechanical couplings.

Finally, the rotatable right-angle DIN connector provides additional flexibility when installing the motor in machines with limited cable-routing space.

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25. Typical Industries

The motor can be considered for applications in:

Industry	Example Application
Factory Automation	Servo-controlled machine axes
Packaging	Indexing, feeding and cutting
Material Handling	Positioning and transfer mechanisms
Machine Tools	Feed and auxiliary axes
Printing	Roller and registration control
Converting	Cutting and tension-control mechanisms
Assembly Automation	Indexing and positioning
Electronics Manufacturing	Precision handling and assembly
Robotics	Rotary positioning mechanisms
Inspection Equipment	Controlled rotary axes
General Machinery	High-speed servo axes

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26. Product Selection Summary

The MPL-B330P-RK74AA is best understood as a specific configuration within the B330P low-inertia servo motor class rather than simply as a generic 1.8 kW motor.

Its key configuration is:

100 mm frame + 76.2 mm magnet stack + 5000 RPM + resolver + keyless shaft + right-angle rotatable DIN connector + 24 V DC brake.

This combination makes it particularly relevant to machines that need a high-speed, low-inertia servo motor together with a holding brake and keyless mechanical interface.

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27. Quick Reference Table

Item	Specification
Model	MPL-B330P-RK74AA
Brand	Allen-Bradley
Series	MP-Series MPL
Product Type	Low-Inertia Brushless AC Servo Motor
Voltage Class	460 V / 480 V AC
Rated Speed	5000 RPM
Output	1.8 kW
Continuous Stall Torque	4.18 Nm
Peak Stall Torque	11.1 Nm
Rotor Inertia	0.00012 kg·m²
Feedback	Resolver
Shaft	Keyless
Brake	24 V DC Holding Brake
Connector	SpeedTEC DIN
Connector Style	Right Angle
Connector Rotation	180°
Frame Size	100 mm
Magnet Stack	76.2 mm
Approx. Weight	6.8 kg
Mounting	IEC Metric
Main Application	High-speed industrial servo motion
Typical Load Type	Positioning, indexing, feeding, rotary motion
Related Family	MPL-B310P / B320P / B330P / B420P / B430P

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28. Final Product Description

The Allen-Bradley MPL-B330P-RK74AA is a 5000 RPM low-inertia brushless AC rotary servo motor in the MPL Series, configured with resolver feedback, a keyless shaft extension, a right-angle rotatable DIN connector, and a 24 V DC holding brake.

With approximately 1.8 kW output, 4.18 Nm continuous stall torque, 11.1 Nm peak stall torque, and 0.00012 kg·m² rotor inertia, the B330P motor class is designed for high-speed and dynamically responsive industrial motion applications.

The 100 mm frame and 76.2 mm magnet stack provide a compact motor platform for applications where available installation space is limited but higher dynamic performance is still required.

The resolver feedback system provides closed-loop motor position information, while the keyless shaft configuration is suitable for compatible keyless mechanical couplings.

The integrated 24 V DC brake makes the RK74AA configuration particularly useful for axes that require mechanical holding capability when the servo motor is not actively generating torque.

Overall, the MPL-B330P-RK74AA is a high-speed industrial servo motor configuration intended for demanding automated machinery, including packaging equipment, machine tools, indexing systems, material handling equipment, assembly machinery, printing and converting systems, and other servo-controlled production equipment.

When selecting this motor for a new machine, the most important items to verify are the required continuous torque, peak torque, operating speed, load inertia, acceleration profile, feedback compatibility, brake requirements, shaft interface, mounting dimensions, cable clearance, and complete drive compatibility.