The Dunham Tool collet provides an expanding member to locate and hold work from the inside, using your present 5c, 16c and 3j equipment - lathes, milling machines, grinders, fixtures, etc. with no extra attachments. Accuracy within .0005 is not unusual on concentricity and the expanding collet enables you to hold close shoulder tolerances.

• 5c Expanding Collet Construction Diagram
• Product Drawings for Expanding Collets
• 5c Expanding Collet Model Number and Description
• Order Online
• For product information or to order, e-mail or call us at 203-739-0415

• Requires no special adapters
• Rigid one piece body / mandrel construction
• Actuated by machine draw tube or collet fixture
• Available from 1/4” to 6” diameter
• Available from 1” to 3” expandable length
• Machinable by customer to desired diameter
• No draw back gives positive end length
• Special expanding collet configurations available
• Internal collet chucking
• Economical and accurate

Visit our online catalog to view the complete Dunham Tool line of machine tool products.

The Dunham Tool expanding collet is inserted into the spindle of your machine and it's 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 Tool 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 expanding collet can operate with the spindle moving.

Dunham Tool expanding 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.

• Dunham Expanding Collet Layout Drawing
gif format or dwg format
• Dunham Expanding Collet Arrangement Drawing
gif format or dwg format