Fanuc AC spindle servo units A06B-6060 I Series drive. CNC West offers a large inventory of Fanuc AC Spindle Servo Units for part exchange, as well facilities and the expertise to fault diagnose, repair, rebuild, refurbish and test within our custom built closed loop Fanuc test rigs. Stocks include 3KW upto 12KW spindle amps driving I Series spindle motors. These Fanuc AC digital spindle servo units are the fifith generation of Fanuc AC spindle and CNC West offers 180 day warranty on exchange and repairs of the A06B-6060 series.