The collet-type punch former is equipped with an ER collet, and the collet can be used in a telescopic range of 1mm

For clamping below 4mm, straight shank type ER16Φ0 must be used for clamping with minimum inner diameter of 2mm

This can quickly and firmly clamp the workpiece, it can be used more stably during processing, and it can be used without adjusting the center.