Product Details

FANUC A06B-0114-B203 is βiS B1/4000 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 0.4kW, rated speed 4000rpm, designed for medium-speed operation with balanced dynamic response and torque capacity. It is equipped with high-resolution serial encoder which retains position data after power failure and skips homing operation. The keyway shaft is designed for timing belt and pulley transmission, delivering stable torque transfer and resisting slippage under medium cutting loads. It is widely used for X, Y sliding axes and rotary fourth axes on medium-sized engraving machines, tapping centers and compact vertical machining centers requiring fast medium-speed positioning.

This servo motor integrates stator winding, low-medium inertia rotor assembly and high-resolution serial encoder inside red-capped aluminum housing. The 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 for belt-driven mechanical layout. Without built-in brake, this variant cannot lock the shaft during power loss; external brake assembly 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 to sustain continuous medium-speed cyclic operation. Its moderate rotor inertia balances acceleration responsiveness and load anti-interference, suitable for frequent positioning and light to medium milling tasks. Users can adjust servo gain and soft limit parameters on CNC system to match medium-speed medium-load feed and the elastic property of belt transmission.

It serves as a direct replacement spare part for original keyway shaft βiS B1/4000 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 medium-load medium-speed feed axis motion rapidly, avoid machine shutdown caused by cutting interruption and positioning deviation. It is widely deployed in tapping machines, compact vertical machining centers and other belt-driven CNC feed axis applications.