The LONGSTAR collet was developed to increase the clamping force. They give excellent results as headstock collet by assuring regularity of the pieces produced even by heavy turning of material. This collet replaces easily the Hainbuch system and it is more economical as it requires no special adaptation. It can also be used as counter spindle collet if a minimum clamping length of 20mm is respected into the bore.
The LONGSTAR collet is also very attractive because of its large clamping range of 0.5mm.