Product Details

FANUC A06B-0115-B503 is βiS B0.5/6000 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 version of A06B-0115-B203. It adopts 200V three-phase AC power supply, rated power 0.35kW, rated speed 6000rpm, stall torque 0.65Nm. It is fitted with B64IA serial encoder for high-precision position feedback. The integrated spring-loaded electromagnetic brake locks the shaft immediately after power loss, preventing vertical axis sliding on small high-speed engraving machines and compact tapping centers. The keyway shaft is designed for timing belt and pulley transmission, delivering stable torque transfer for light and medium load feed movement. It is commonly installed on Z-axis and auxiliary rotary axes of small CNC equipment where position retention is required during power outage.

This servo motor integrates stator winding, low inertia rotor assembly, B64IA serial encoder and spring static holding brake inside red-capped aluminum housing. The encoder transmits high-precision angle feedback signals 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 operation. Two separate connectors are reserved 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 support continuous ultra-high-speed cyclic operation. Its low rotor inertia enables rapid acceleration and deceleration, suitable for frequent short-stroke reciprocating positioning tasks. Users can adjust servo gain, soft limit and brake delay parameters on CNC system to match vertical axis gravity balance and ultra-high-speed light-load belt transmission characteristics.

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, 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 light-load ultra-high-speed vertical feed axis motion rapidly, avoid machine shutdown caused by cutting interruption and vertical axis sliding. It is widely deployed in compact tapping machines, small engraving equipment and other belt-driven CNC vertical feed axis applications.