Dunham tool has been designing and manufacturing innovative products for over 45 years. since 1958 Dunham Tool has been designing and manufacturing innovative, high quality workholding products for manufacturing industries worldwide. the dunham precision line of machine tools includes, collets, collet chucks, high speed precision spindles, expanding mandrels, collet closers, lathe bar pullers, spindle headstocks. our reputation in industry for quality, innovation, accuracy, repeatability and value has been earned by focusing the exceptional quality of our products and our customer support on producing manufacturing efficiencies and profits for you.