Product Description
The Allen-Bradley MPL-A320H-MJ72AA is a high-performance, low-inertia, 400V AC brushless servo motor designed for demanding motion applications. Part of the MP series, it features smart motor technology for automatic identification and advanced windings for up to 40% higher torque-to-size ratio. This 1.5 kW motor delivers 27 lb-in continuous stall torque (70 lb-in peak) with a 14A peak stall current and a base speed of 3,500 rpm. It includes a battery-free, multi-turn 1024 sin/cos absolute encoder (Hiperface) for precise position feedback. While it lacks a 24V DC brake option, it offers enhanced winding insulation, 180-degree rotatable SpeedTec connectors (M23/M40 compatible), a standard shaft-end threaded hole and key, a 100mm frame, a 50.8mm magnet stack, and an IP51 enclosure. Operating within 0-40C and 5-95% non-condensing humidity, this 3.7 kg motor is CE, UL, and CSA certified.
Is Your Device Showing These Signs?
The Allen Bradley MPL-A320H-MJ72AA servo motor commonly experiences issues such as resolver signal degradation leading to inaccurate positioning, necessitating resolver replacement or recalibration. Bearing failures are frequent due to demanding application loads and environmental factors, requiring bearing replacement and proper lubrication. Overheating is observed, stemming from inadequate heat dissipation or excessive current draw, which demands investigation of cooling systems and drive parameters. Winding insulation breakdown occurs due to thermal stress and voltage spikes, often requiring motor rewinding or replacement. Shaft keyway damage or shaft breakage results from mechanical overload or improper coupling alignment, mandating shaft repair or motor replacement.
Technical specifications
The Allen-Bradley MPL-A320H-MJ72AA is a 1.5 kW, 400V AC brushless servo motor with high performance and low inertia. It delivers 27 lb-in continuous stall torque, features a Hiperface absolute encoder, SpeedTec connectors, and is CE, UL, and CSA certified.
Our Repair Process for the
MPL-A320H-MJ72AA
Our repair process for the Allen Bradley MPL-A320H-MJ72AA servo motor begins with a comprehensive diagnostic evaluation to pinpoint the root cause of failure, addressing common issues such as resolver signal degradation through resolver replacement or recalibration to ensure accurate positioning. Bearing failures are rectified by replacing bearings and implementing proper lubrication techniques. Overheating problems are resolved by investigating cooling systems and optimizing drive parameters to enhance heat dissipation and reduce current draw. Winding insulation breakdown necessitates motor rewinding or complete motor replacement. Shaft keyway damage or shaft breakage demands shaft repair or motor replacement, coupled with meticulous coupling alignment to prevent recurrence.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.

Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.

















