Fanuc A06B-6055-H AC Spindle Servo Unit - Digital. DNC offer comprehensive services for the 6055 Series of AC digital spindle drives, including exchange, repair, used surplus spares, and full fault diagnosis and testing facilities. 180 day warranty exists on repairs and supplied parts, also spindle boards, orientation pcbs, and transistor modules are available. For the A06B-6055 AC spindle drives that are not in stock, or drives that not required urgently, DNC offer a 24 hour turnaround service as standard on A06B-6055- if AC spindle repairs are urgent then same day is possible with enough advanced notice.