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Major milestone with 6-jaw chuck from Schunk

Sealed Schunk 6-jaw chuck with pendulum compensation

Long time supplier to Romheld Automation, SCHUNK has expanded its product range for clamping deformation-sensitive workpieces with a sealed 6-jaw pendulum compensation power lathe chuck.

No surprise at this milestone for high precision automation holding requirements. Schunk is recognised the world over as the competence leader for gripping systems and clamping technology.

With this Schunk 6-jaw chuck, special seals located on the serrated jaw interface and pistons of the SCHUNK ROTA NCR-A prevent grease from being flushed out and prevent the clamping force from being gradually lost. Precise chuck function is ensured, even at low clamping forces. In addition, the seal prevents chips or dirt from ingress into the chuck body. This increases process reliability and extends maintenance intervals, translating into less frequent lubrication and cleaning of the lathe chuck.

The sealed SCHUNK ROTA NCR-A allows for gentle and precise clamping of deformation-sensitive components.

Perfect centering and maximum concentricity

The SCHUNK ROTA NCR-A consists of a central chuck piston carrying three inner pendulums aligned at 120°. Each pendulum is connected to two base jaws. This ensures workpiece centering between six contact points, which can be adjusted in pairs. As the clamping forces are directed towards the chuck center, optimal centering is achieved without distortion of the workpiece.

The chuck perfectly adjusts to the workpiece with its oscillating jaws. With conventional jaw clamping, this configuration allows for maximum concentricity of the workpieces and ensures optimal centering at the same time. In the case of ring-shaped workpieces, deformation is reduced by a factor of 10 as compared to clamping with 3-jaw chucks.

Users can also clamp the pendulum of the ROTA NCR-A in the center position during the final processing stage or when clamping pre-turned surfaces so that all six jaws move concentrically. The clamping force between the first and second clamping can be adjusted by a pressure reduction at the hydraulic cylinder. An extremely rigid chuck body and long jaw guidance ensure high repeat accuracy and precise results.

See the full story on the Schunk website: https://schunk.com/pl_en/news/highlights/notifications/article/3584-sealed-6-jaw-power-lathe-chuck-with-pendulum-compensation/ 

Vast Schunk chuck jaw selection

Standard jaws can be used to replace elaborate system jaws and special solutions on the ROTA NCR-A jaw interface. This saves both time and cost-intensive special solutions, increases flexibility, and reduces set-up costs. Because of its high precision, it is possible to eliminate entire production steps, for example, by reaching tolerances during the finishing process that would otherwise only be reached in complex grinding operations. Since the chuck has a very flat design, and there is plenty of space in your machine for the workpiece and the machining process.

Need more information about the Schunk 6-jaw chuck or other options? We can help. Call us or drop a note on Contact Us.

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We want to help you find the best product or system solution. Call us on 1800 465 348 or tell us more in an email at Contact Us.

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