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Masa Tool’s Microconic T-type over-grip collet features a longer gripping surface for holding longer parts. The collet can open as wide as 3.5 mm (0.138") over the chucking diameter and runs within 5 microns (0.0002") TIR.  

The collet is designed for use with longer parts such as bonescrews with wide-pitch threads; orthopedic surgical drills and taps; long shafts with flange; long, thin-walled tubular parts and long plastic parts.

Extra spread is required to open the collet wide enough to go over the larger diameter. The correct over-grip collet for a specific part can be chosen based on grip diameter, width of the grip land and the largest diameter of the part.

According to the company, the collet expands machine capability, eliminates secondary operations and reduces cycle time. It features a standard gripping land length of two-to-three times the diameter. It is available with diameters ranging from 1.55 mm to 7.2 mm (0.061" -0.283"). The collet is said to grip with the same rigidity and accuracy as regular collets and features a fatigue-tested design built to last more than 250,000 full-load cycles. The collets are compatible with the company’s cartridges and come with its Microguide Brass ejection guide sleeve blank.