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PZH-SF Large Stroke Gripper from SCHUNK

Story added 05 September 2011.

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If components with different sizes have to be handled in succession, one concentric gripper can now be used. With its swivelling fingers, the new PZH-SF Large Stroke Gripper from SCHUNK covers an enormous spectrum of components and diameters. Instead of changing the top jaws or the complete gripper again and again, the fingers of the PZH-SF just swivel into another position. The opening stroke per finger amounts to 113mm in radial direction. Depending on the jaw position, the gripper handles components with diameters between 100 and 430mm.

The PZH-SF is the largest standardized concentric gripper on the market, where the fingers swivel in the same direction. Despite its compact outside dimension, the gripper from the innovative family-owned company achieves an enormous stroke. Compared with conventional concentric grippers, it transmits a power ratio nearly double to its volume and mass. With a gripping force of 1,500N it handles workpieces up to 11.8kg (at a friction coefficient of µ=0.1) and achieves a safety factor that is twice as high. For larger diameters or special requirements, the length and the orientation of the three swivelling arms and also the length and shape of the fingers, can be individually adjusted. Moreover, monitoring can now be carried out reliably by magnetic field sensors or inductive sensors. With its variable gripping diameter, the new PZH-SF provides efficiency where components of various diameters have to be handled, particularly for loading machine tools or for handling cast materials.

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