MITSUBISHI HF-H54S-A51 AC Servo Motor 340V 1.1A 3000rpm 0.5kW A51

Buy online your MITSUBISHI HF-H54S-A51 AC Servo Motor from our US e-store Cnc-shopping USA, specialist in CNC machine-tools spare parts.

The MITSUBISHI HF-H54S-A51 is a compact AC brushless servo motor designed for precision axis positioning and feed motion in CNC machine tools and industrial automation systems. Used with compatible Mitsubishi servo amplifiers, it delivers accurate speed and torque control, making it an ideal replacement motor or spare part for maintenance, repair, and retrofit applications.

Rated at 0.5 kW with a rated speed of 3000 rpm, the motor operates on the 400 V class with a rated current of 1.1 A. It produces a rated torque of 1.6 N·m and a stall torque of 2.9 N·m, providing smooth acceleration and reliable positioning under varying load conditions. The integrated 20-bit absolute encoder (equivalent to approximately 1,000,000 pulses per revolution) ensures highly accurate position feedback and stable commutation for precise closed-loop motion control.

The HF-H54S-A51 features a 130 × 130 mm flange, a straight shaft, and an IP67 protection rating, making it suitable for demanding industrial environments. It is commonly installed on CNC X, Y, and Z feed axes, rotary indexers, gantry systems, automated fixtures, and other precision motion applications. Its compact flange-mounted design allows straightforward replacement when the original motor shares the same mechanical dimensions and shaft configuration.

Maintenance teams frequently select this model to replace motors affected by encoder failures, bearing wear, winding damage, or reduced performance. Installing an identical motor helps restore machine accuracy while minimizing commissioning time and reducing production downtime. It is also widely used as a stocked spare for preventive maintenance and emergency repairs on Mitsubishi-based CNC systems.

Each motor can be supplied as a tested unit after functional verification by qualified engineers using dedicated CNC servo test equipment. Testing includes encoder feedback verification, smooth rotation, and electrical performance checks. Units are carefully packaged with shaft and connector protection for safe industrial transport and are covered by the Cnc-shopping warranty. Repair, exchange, refurbished unit, and obsolete part sourcing services may also be available to help extend the operating life of legacy Mitsubishi CNC installations.

Frequently asked questions about HF-H54S-A51:

How do I confirm drive compatibility for the HF-H54S-A51?
Verify that your Mitsubishi servo amplifier supports the 340 V class and the A51 feedback specification. Check the drive manual against the motor nameplate values for voltage, rated speed and current before ordering a replacement unit.

What does the A51 option indicate on this motor?
A51 designates the feedback and connector specification defined by Mitsubishi for this variant. It must match the installed drive and cable sets to maintain proper commutation and position control.

Can this motor replace a similar HF series unit with a different suffix?
Only if the voltage class, encoder option, speed rating, flange size, shaft details and connectors are the same. If any of these differ, consult our team for a compatible CNC replacement component or repair service.

Are cables included with the motor?
Power and encoder cables are typically sourced separately. Reusing existing Mitsubishi cable sets is common when connectors and lengths match the installation.