Fanuc AC A06B-6044 spindle servo drive. CNC West offers a large inventory of Fanuc AC Digital Spindle Servo Units for service exchange and outright (exchange stock permitting), as well capabilites and service too fault diagnose, repair, rebuild, refurbish and test within our closed loop Fanuc test rigs.. Stocks include 3KW upto 60KW spindle amps driving AC spindle motor models. These Fanuc AC digital spindle servo units are the third generation of Fanuc AC spindle and 1st digital spindle and CNC West offers 180 day warranty on exchange and repairs of the A06B-6044 series.