Dunham Tool Co. Workholding

> 5C Expanding Collets & Mandrells BACK TO SPECIAL SALES, TIPS, & TECHNICAL INFO HOME 5C Expanding Collets 16C Expanding Collets •INTERNAL COLLET CHUCKING •ECONOMICAL • ACCURATE The DUNHAM COLLET provides an expanding member to locate and hold work from the inside, using your present 5C or 16C equipment - lathes, milling machines, grinders, fixtures, etc. - no extra attachments. Accuracy within .0005 is not unusual on concentricity and the expanding collet enables you to hold close shoulder tolerances. Features and Benefits 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 Collet configurations available   Machinable Expanding Mandrel (Miser Mandrel) The DUNHAM "Miser Mandrel" provides an expanding member to locate and chuck work from the bore, for light secondary operations - using your present machine tools. Features and Benefits Requires no special adapters Can be used with 5C Collets or standard Jaw Chucks Can be used with vises or special fixtures Actuated manually via Hex head draw bolt Available from 5/16” to 3¾” diameter Available from 1” to 2” expandable length Machinable by customer to desired diameter No draw back gives positive location