SCHUNK expands product range
SCHUNK, manufacturer of gripping systems and clamping technology has expanded its product range with a sealed 6-jaw pendulum compensation chuck for clamping deformation-sensitive workpieces. The special seals located on the serrated jaw interface and pistons of the SCHUNK ROTA NCR-A prevent grease from being flushed out and 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 getting into the chuck body. This increases process reliability and lengthens maintenance intervals, translating into less frequent lubrication and cleaning of the lathe chuck.
The SCHUNK ROTA NCR-A consists of a central chuck piston carrying 3 inner pendulums aligned at 120°. Each pendulum is connected to 2 base jaws. This ensures workpiece centring between 6 contact points, which can be adjusted in pairs. As the clamping forces are directed towards the chuck centre, 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 centring 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 centre position during the final processing stage or when clamping pre-turned surfaces so that all 6 jaws move concentrically. The clamping force between the first and second clamping can be adjusted by means of a pressure reduction at the hydraulic cylinder. An extremely rigid chuck body and long jaw guidance ensure high repeat accuracy and precise results.
Standard jaws can be used to replace elaborate system jaws and special solutions on the ROTA NCR-A jaw interface. This saves 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, there is plenty of workspace in your machine for the workpiece and the machining procedures.
The company is also offering a range of diverse claw and stepped jaw models for raw part clamping from the world’s largest range of standard chuck jaws also optionally as a lightweight version. Depending on the jaw type, the user can save around 40% of the weight but completely retain all of the characteristics of the standard jaws, such as stability.
The lightweight chuck jaws primarily reduce the effects of centrifugal force at high speeds, which reduces the loss of clamping force and increases process reliability. Alternatively, parts that are sensitive to deformation require lower clamping forces in order to machine workpieces in a process-stable way. Other advantages are improvements to the interfering contour as well as energy saving since less mass is accelerated and slowed down. The weight-reduced chuck jaws therefore provide the ideal preconditions for the use on lightweight lathe chucks such as the SCHUNK ROTA NCE and on conventional lathe chucks with fine serration or tongue and groove.
SCHUNK’s 6-jaw pendulum compensation chuck
SCHUNK lightweight jaw