Precision Six-Jaw Power Chuck

The Rota NCR is a six-jaw power chuck designed for machining thin-walled and easily deformed workpieces. With six-point contact on the workpiece, pre-machined parts can be clamped without deforming them. The power chuck comprises a central chuck piston that has jaws oscillating in pairs for concentric clamping.

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The Rota NCR is a six-jaw power chuck designed for machining thin-walled and easily deformed workpieces. With six-point contact on the workpiece, pre-machined parts can be clamped without deforming them. The power chuck comprises a central chuck piston that has jaws oscillating in pairs for concentric clamping. A pendulum is connected to each set of two base jaws, so that the workpiece is centered between six points of contact where the members of each pair lie opposite one another. The clamping forces align toward the center of the chuck, which permits maximum roundness of workpieces with conventional jaw clamping, the company says. During finish machining or when clamping pre-machined surfaces, the pendulums of the power chuck can be clamped in their center position. With this configuration, the six clamping jaws are moved simultaneously and concentrically. Clamping is achieved simply by inserting the attachment bolt in the piston. The power chuck is available in sizes of 165 mm, 210 mm, 250 mm and 315 mm.