HC-KFS43 is Mitsubishi MELSERVO J2S low inertia AC servo motor, rated 400W, rated speed 3000rpm, rated torque 1.3Nm, equipped with 17-bit high resolution encoder, matched with MR-J2S servo amplifier. HFUC-25-50-2UH-SP is Harmonic Drive HFUC series strain wave reducer, size 25, reduction ratio 50:1, 2UH integrated heavy-duty cross roller bearing, SP for special customized version. This combination is widely used in robot joints, rotary indexing tables, precision automation positioning equipment requiring zero-backlash and high torque density. Both are end-of-life spare parts for legacy precision motion platforms.

HFUC-25-50-2UH-SP harmonic reducer adopts wave generator, flexspline and circular spline structure, extremely low backlash and high rotation accuracy. Built-in cross roller output bearing can directly support heavy payload without extra auxiliary bearing. The reducer input flange matches HC-KFS43 servo motor, compact integrated assembly saves machine space. The servo motor IP55 protection class, low rotor inertia realizes fast acceleration/deceleration response. Separate power and encoder connectors for convenient wiring and maintenance, AC200V winding design.

The reducer repeated peak torque reaches 98Nm, momentary peak torque 186Nm, input speed up to 3500rpm, suitable for continuous cyclic swing and indexing motion. The operating temperature range for whole assembly is 0~40℃. Motor internal thermal sensor monitors winding temperature to avoid burnout; reducer filled with special harmonic grease for long service life. Combined system needs MR-J2S amplifier, encoder cable and power cable for commissioning.

HC-KFS43 and HFUC-25-50-2UH-SP are obsolete precision motion spare parts. Many legacy robot and automation stations adopt this servo & harmonic reducer set. When the assembly fails, replacement with identical HC-KFS43 + HFUC-25-50-2UH-SP can reuse mounting frame, output flange, power and encoder cables. Technicians install the set, align motor and reducer, perform origin setting and test jogging and positioning motion, so high-precision rotary motion system resumes operation and reduces production downtime.

Before shipment, every HC-KFS43 undergoes winding resistance, insulation and encoder signal test. Every HFUC-25-50-2UH-SP checks rotation smoothness, backlash and grease status. All products come with 12-month warranty. Our automation technical team provides remote support for installation, alignment guidance, parameter configuration and fault diagnosis. Fast global shipping available for urgent maintenance orders.

For automation maintenance engineers and system integrators, HC-KFS43 + HFUC-25-50-2UH-SP is reliable spare servo-harmonic reducer assembly for legacy high-precision rotary axes. It restores high-torque zero-backlash positioning, guarantees robot joint and indexing performance, extends service life of automation assets and avoids whole mechanical renovation.