As many as four indexers with tailstocks mount for multipart processing. Bearing spindle indexers are available in single, dual, triple and quad units. Options include manual or pneumatic tailstocks and a choice of collet closers including a fail-safe, through-hole model with a 1.080-in. through-hole for bar feeding, through-coolant and long parts. The air-open, spring-close failsafe design keeps parts clamped if air is lost. Drawbar travel of 0.0625 in. allows 0.015-in. loading clearance without adjustment.
The bearing spindle indexer integrates with CNC applications as a fourth axis using a Hardinge all-digital servo control and a CNC interface cable, or by connecting via the RS-232 port and interface cable or by using the capabilities of the machine's CNC control and motor amplifier.