Product Details

FANUC A06B-0115-B203 is βiS B0.5/6000 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 0.35kW, rated speed 6000rpm, stall torque 0.65Nm, built for ultra-high-speed running with compact frame size. It is equipped with serial encoder for high-precision position feedback. The keyway shaft is designed for timing belt and pulley connection, keeping stable torque transfer under light and medium cutting loads. It is widely used for high-speed X/Y axes and rotary fourth axes on small engraving machines and compact tapping centers.

This servo motor integrates stator winding, low inertia rotor assembly and 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 high-speed cyclic operation. Its low rotor inertia enables quick acceleration and deceleration, ideal for frequent short-stroke reciprocating movement and rapid positioning. Users can adjust servo gain and soft limit parameters on CNC system to match light-load ultra-high-speed feed and the elastic property of belt transmission.

It serves as a direct replacement spare part for original keyway shaft βiS B0.5/6000 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 light-load ultra-high-speed feed axis motion rapidly, avoid machine shutdown caused by cutting interruption and positioning deviation. It is widely deployed in compact tapping machines, small engraving equipment and other belt-driven CNC feed axis applications.