MicroCentric Corp. announces a new line of high precision power chucks to replace the current PPC series. The new PPC-D models feature a dual actuator design providing increased clamping force and higher RPM capability. The new design achieves greater rigidity resulting in improved accuracy at high draw tube forces. Increased chuck life is also attained since the internal clamping load is distributed over twice the surface area compared to the original PPC design. Workholding is a critical factor in the overall quality of a machined workpiece, particularly in precision machining operations such as finish turning and grinding as well as hard turning and sub spindle applications where maintaining close geometric tolerances with previously machines surfaces is often critical. PPC-D chucks are designed for the stringent demands of these applications. They feature a repeating accuracy of .0001” (0.0025mm), and enable users to exceed their Cpk and Ppk requirements by holding tighter concentricity, squareness, and parallelism tolerances than conventional power chucks. MicroCentric’s patented QC precision jaw locating system is standard on all PPC-D models. The QC system maintains .0002” (0.005mm) maximum workpiece runout after jaw change without remachining top jaws. The QC system also enables the interchangability of finished machined jaws between different chucks and still maintains maximum workpiece runout within .0008” (0.02mm). PPC-D chucks are available in the following diameters: 4.33” (110mm), 6.50” (165mm), 8.25” (210mm), 10.00” (250mm), and 12.00” (300mm), in both 3 jaw and 2 jaw models. Different configuration spindle adapter plates are available, and PPC-D chucks can be adapted to operate with existing hydraulic or pneumatically actuated draw tubes. MicroCentric also specializes in designing hardened and precision ground top jaws, part stops, and other tooling for specific machine and workpiece applications.
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