Product Details

FANUC A06B-0114-B503 is βiS B1/4000 AC servo motor with keyway shaft and built-in 24V holding brake, belonging to FANUC Beta iS servo series, compatible with βiS servo amplifiers and FANUC 0i-MF, 0i-MF Plus CNC systems. It is the brake-equipped variant of A06B-0114-B203. It adopts 200V three-phase AC power supply, rated power 0.4kW, rated speed 4000rpm, balancing fast dynamic response and medium torque capacity. The integrated power-off electromagnetic brake locks the shaft immediately once power cuts off, preventing vertical Z-axis falling on tapping centers and compact vertical machining centers. It is equipped with high-resolution serial encoder which memorizes axis position data after power loss and removes homing operation. The keyway shaft is designed for timing belt and pulley transmission, maintaining stable torque transfer and resisting slippage under medium cutting loads. It is commonly used on vertical Z axes and auxiliary rotary axes of tapping machines and small CNC machining centers.

This servo motor integrates stator winding, medium inertia rotor assembly, high-resolution serial encoder and spring static holding brake inside red-capped aluminum housing. The encoder transmits high-precision angle feedback to servo amplifier to realize closed-loop position, speed and torque control. The built-in brake is power-release type, only for static shaft holding instead of dynamic braking during high-speed running. 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 speed and load disturbance resistance, suitable for frequent positioning and light to medium milling tasks. Users can adjust servo gain, soft limit and brake delay parameters on CNC system to match vertical axis gravity balance and medium-load medium-speed belt transmission characteristics.

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, brake slip, shaft wear and winding burnout. Every unit will pass winding insulation test, encoder position reading test, brake holding force verification and servo amplifier matching test before shipment, ensuring stable torque output and reliable static locking performance. Replacing this servo motor can restore medium-load medium-speed vertical feed axis motion rapidly, avoid machine shutdown caused by cutting interruption and vertical axis sliding. It is widely deployed in tapping centers, compact vertical machining centers and other belt-driven CNC feed axis applications.