The DUNHAM EXPANDING COLLET is inserted into the spindle of your machine and its threaded draw bar until the 5C or 16C taper seats. The conventional movement of the draw bar will expand and release the soft slotted member.
The soft mandrel may be machined to fit any I.D. within the range of the collet, i.e. from 1/4" to 6".
The solid taper on the collet, once seated, will not draw back into the spindle. Thus a machined shoulder will hold the width dimensions within .001". The DUNHAM EXPANDING COLLET may be removed and replaced in a machine without affecting its accuracy as with any standard collet. If accuracy to within .0005" is desired, a slight truing cut will suffice. The collet can operate with the spindle moving.
DUNHAM COLLETS may be transferred to any machine using standard 5C collets. Therefore, it may be switched from machine to machine for use in turning, grinding, machining, drilling, milling, etc., saving valuable time.
