Product Description
The Mitsubishi MELSERVO HC-UFS352K is a compact, 3.5 kW brushless AC servo motor designed for agile performance in diverse applications. Operating at 200V AC, it features a keyed shaft, flange mounting, and an oil seal for enhanced stability and protection. It delivers a rated torque of 16.7 Nm (max 50.1 Nm) at a rated speed of 2000 RPM (max 2500 RPM) with a rated current of 23A (max 69A).
Is Your Device Showing These Signs?
The Mitsubishi HC-UFS352K servo motor commonly requires repair due to issues such as resolver feedback errors, encoder failure, and resultant positioning inaccuracies. Over time, the bearings degrade, causing excessive noise and vibration, which affects performance. Winding shorts or open circuits in the stator are frequent problems, leading to torque deficiencies and potential drive faults. Connector pin corrosion and cable insulation breakdown also interrupt signal integrity, causing intermittent operation and system downtime. These issues necessitate component replacement, winding repair, or complete motor refurbishment to restore optimal functionality.
Technical specifications
The Mitsubishi MELSERVO HC-UFS352K is a 3.5 kW, 200V AC servo motor with a keyed shaft, flange mounting, and oil seal. It offers 16.7 Nm rated torque (50.1 Nm max) at 2000 RPM (2500 RPM max) with a rated current of 23A (69A max).
Our Repair Process for the
HC-UFS352K
Our repair process for the Mitsubishi HC-UFS352K servo motor begins with a comprehensive diagnostic evaluation to pinpoint resolver feedback errors, encoder failures, bearing degradation, winding shorts or open circuits, and connector/cable issues. Following the assessment, we proceed with component replacement, which includes bearings, encoders, resolvers, and connectors, as needed. Stator windings are either repaired or rewound to eliminate shorts or open circuits, ensuring proper torque output. Damaged cables are replaced or repaired to maintain signal integrity. The motor is then reassembled, dynamically tested under load conditions, and subjected to rigorous quality control checks to verify performance and adherence to original specifications before being returned.
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.

















