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Eppinger Preci-Flex dual radial collet chucks from Exsys Tool are designed to increase the machining capability of turning center turret stations. The chucks are compatible with Mazak Quick Turn and QTU turning centers with optional high-speed drive motors, Y-axis functionality and standard BMTY turrets. The double-collet chuck can deliver speeds ranging to 10,000 rpm with a 1:1 ratio and 20 Nm of torque and features 1,000-psi (70-bar) internal coolant. In addition, 12,000-rpm live toolholders are available.

With the double-collet chuck, operators can switch between fixed- and rotary-base holders with quick changeovers in one station on the machine turret. Any combination of two collets, end mill holders, expanding collet chucks and shrink fit tooling can be mounted on a single base holder.

Available in horizontal-type, 90-degree radial holders and vertical-type, straight offset axial holders, the Preci-Flex double-collet chuck provides repeatability within 5 microns. The tooling system features a compensating clutch with a floating coupling between turret drive motor tangs and toolholders that automatically compensates for misalignment. The resulting precision reduces vibration and chatter for longer tool life and improved surface finishes.

The Preci-Flex modular system includes conical and flat-face planar interfaces that accept either an adapter or a standard ER collet. According to the company, its monoblock housing maximizes torque transmission and rigidity, resulting in increased machining accuracy and improved productivity.