MITSUBISHI HC-KFS43K-S27 AC Servo motor 3000rpm 400W

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The MITSUBISHI HC-KFS43K-S27 is a compact AC servo motor from the MELSERVO HC-KF/KFS series, designed for precise axis motion and positioning on CNC machines and industrial automation equipment. With a rated output of 400 W and a rated speed of 3000 rpm, it is suitable for light- to medium-duty feed axes and auxiliary motion applications.

The motor operates with a nominal current of 2.3 A and features a keyed shaft for standard mechanical coupling. Its integrated feedback system provides closed-loop control when paired with a compatible MITSUBISHI servo amplifier, enabling accurate positioning, stable speed regulation and repeatable axis movement.

The HC-KFS43K-S27 is suitable for small CNC machining centers, CNC lathes, positioning tables, tool changers, loaders, pick-and-place systems and automated machinery. Its compact design makes it suitable for applications where installation space is limited.

This MITSUBISHI servo motor is particularly appropriate as a replacement motor, spare part or CNC replacement component for existing MELSERVO installations. Before installation, it is recommended to verify the servo amplifier compatibility, feedback configuration, mounting dimensions, connector type and shaft dimensions.

A tested unit can be checked with a compatible MITSUBISHI servo amplifier to verify motor operation, feedback signals and electrical performance before dispatch. It is therefore a practical solution for maintenance, retrofit and emergency replacement, helping reduce downtime on CNC and industrial automation equipment.

Frequently asked questions about HC-KFS43K-S27:

Which servo drives pair with this motor?
Use a MITSUBISHI servo amplifier rated for 400 W that matches the motor’s feedback and connector style. Check the existing drive nameplate and motor label to confirm a direct pairing before ordering.

Is it a drop-in replacement for other HC-KF variants?
It depends on mechanical flange, shaft details, feedback specification and connector orientation. Compare the full code against the installed unit and match these points to ensure a clean drop-in.

Can it be used for retrofits on older machines?
Yes when mechanical mounting, rated speed, voltage class and feedback interface align with the target drive. Many retrofit teams validate fitment with drawings and a short test on a bench before installation.

What checks help during a field replacement?
Inspect the coupling and alignment, verify insulation resistance and confirm drive parameters match the motor code. After installation run a low-speed jog and autotune if required by the drive.