Product Details

FANUC A06B-0075-B203 is βiS B8/3000 AC servo motor with keyway shaft and no built-in holding brake, belonging to FANUC Beta iS servo series, compatible with βiS servo amplifiers and FANUC 0i-MF, 0i-MF Plus CNC systems. It adopts 200V three-phase AC power supply, rated power 1.2kW, rated speed 3000rpm, stall torque 7Nm, equipped with B128iA absolute encoder, which retains position data after power outage and eliminates homing operation. The keyway shaft design is suitable for timing belt and pulley transmission layout, transferring torque steadily and preventing slipping under medium heavy cutting load. It is widely used for horizontal X and Y feed axes of CNC lathes and small vertical machining centers.

This servo motor integrates stator winding, moderate inertia rotor assembly and B128iA absolute encoder inside red-capped aluminum housing. The B128iA absolute encoder transmits high-precision angle feedback to servo amplifier, supporting closed-loop position, speed and torque control. It comes with keyway shaft matched with synchronous pulley and gear coupling. Without built-in brake, this variant cannot lock the shaft when power fails; external mechanical brake must be equipped if deployed on vertical Z-axis. Two separate connectors are arranged at the rear for power cable and encoder cable, following FANUC standard pin definition for convenient wiring and maintenance.

The front shaft sealing structure reaches IP65 protection grade, resisting coolant splashes, cutting oil mist and fine metal dust in CNC workshops. The internal bearing set uses long-life grease lubrication, stable under continuous medium-speed reciprocating cutting. Its moderate rotor inertia balances torque capacity and dynamic response, delivering smooth feed movement for mold turning and milling. Users can adjust servo gain and soft limit parameters on CNC system to match medium-speed heavy cutting feed characteristics and the elastic property of belt drive.

It serves as a direct replacement spare part for original keyway shaft βiS B8/3000 servo motors suffering from bearing abnormal noise, encoder signal loss, shaft wear and winding burnout. Every unit will pass winding insulation test, encoder position reading test and servo amplifier matching test before shipment, ensuring stable torque output and precise positioning performance. Replacing this servo motor can restore heavy-load medium-speed feed axis motion rapidly, avoid machine shutdown caused by cutting interruption and positioning deviation. It is widely deployed in CNC lathes, vertical milling machines, mold processing centers and other belt-driven CNC feed axis applications.