Product Details

FANUC A06B-0085-B203#0100 is βiS B22/2000 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. The #0100 suffix stands for sealed B128iA absolute encoder configuration, the standard version for spare replacement of overseas exported machine tools. It adopts 200V three-phase AC power supply, rated speed 2000rpm, optimized for low-speed stable operation with high continuous torque to handle heavy roughing workloads. The sealed B128iA absolute encoder retains position data after power-off and skips homing operation, with improved sealing performance against coolant mist and fine dust in harsh factory environments. The keyway shaft is designed for timing belt and pulley transmission, maintaining steady torque transfer and preventing slippage under heavy cutting load. It is widely used for horizontal X and Y feed axes of heavy-duty vertical machining centers and large mold milling machines that require stable low-speed cutting.

This servo motor integrates stator winding, high inertia rotor assembly and sealed 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 for belt-driven mechanical layout. Without built-in brake, this variant cannot lock the shaft during power loss; 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 to sustain continuous low-speed heavy cutting cycles. Its high rotor inertia delivers outstanding load disturbance rejection during large stock removal, ensuring smooth and consistent feed movement for large mold roughing and finishing. Users can adjust servo gain and soft limit parameters on CNC system to match low-speed heavy-load feed and the elastic property of belt transmission.

It serves as a direct replacement spare part for original #0100 coded keyway shaft βiS B22/2000 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 low-speed feed axis motion rapidly, avoid machine shutdown caused by cutting interruption and positioning deviation. It is widely deployed in export heavy vertical milling centers, large mold processing equipment and other belt-driven CNC feed axis applications.