The Microconic workholding system consists of a cartridge and precision collet. The collet fits inside the cartridge and is adjusted before being fitted directly into the existing collet sleeve. No machine adaptations are required.
Available with clamping diameters from 0.2 to 10 mm, the collets offer a concentricity level of 3 to 5 micron. The cartridge system incorporates a solid extended nose that is said to be rigid and robust. Of note, the device has the facility for micron-adjustment of the collet closure, ensuring that even the most fragile of components can be clamped. The hardened and ground cartridges can also be used as gauges to verify machine spindle accuracy.
The cartridge/collet combination can accommodate openings beyond 4 mm larger than the clamping diameter (depending on the application). This flexibility gives the production engineer the possibility to machine the part the other way around, which can often improve cycle times.
MASA Microconic collets are available in 0.05 mm increments, from 0.22 up to 10 mm diameter. Each collet has a nominal clamping range from 0.05 to 0.1 mm, depending upon the chosen collet diameter.
‘Over-clamping’ collets also feature in the Microconic range to clamp behind a shoulder, for example. Here, the nominal clamping diameter starts at 0.5 mm, up to a maximum of 7.20 mm. Fatigue tested to over 250,000 full-load cycles, the over-clamping collets include a part-ejection guide sleeve blank.