Product Details

FANUC A06B-0075-B003 is βiS B8/3000 AC servo motor with straight taper shaft and no built-in holding brake, belonging to FANUC Beta iS low-inertia 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 1.2kW, rated speed 3000rpm, stall torque 7Nm, equipped with B128iA absolute encoder, which retains position data after power outage and eliminates homing operation. It is designed for medium-speed heavy cutting feed axes, suitable for milling machine X, Y horizontal axes that pursue stable torque output rather than ultra-high speed.

This servo motor integrates stator winding, low inertia rotor assembly and 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 adopts straight taper shaft, matched with rigid coupling and directly connected to ball screw, reducing transmission backlash and improving contour accuracy. Without built-in brake, this variant cannot lock the shaft when power fails; external mechanical brake is required for vertical Z-axis application. 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, stable under continuous medium-speed reciprocating cutting. Its moderate rotor inertia balances torque capacity and dynamic response, delivering smooth feed movement for heavy mold cutting. Users can adjust servo gain and soft limit parameters on CNC system to match medium-speed heavy cutting feed characteristics.

It serves as a direct replacement spare part for original straight shaft βiS B8/3000 servo motors suffering from bearing abnormal noise, encoder signal loss, shaft runout 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 medium-speed feed axis motion rapidly, avoid machine shutdown caused by cutting interruption and positioning deviation. It is widely deployed in vertical milling machines, mold processing centers, heavy tapping equipment and other CNC feed axis applications.