Abstract: The grip chuck spindle assembly is used to hold burs and drills in dental high speed handpieces. The grip chuck spindle assembly consists of three parts. An outer spindle which is hollow having three different diameter bores and a outer diameter sized to receive press fitted bearings and an impeller. A clamping bushing at the bur end of the spindle which has two bores one to freely accept burs and drills and a smaller bore at the end with longitudinal slots that run into a tear drop hole which together form the two clamping fingers. The third part is a plunger with one wedge shape end which engages the clamping bushing slots, and when pressure is applied to the plunger the wedge spreads the end of the clamping bushing open to allow removal or insertion of a bur or drill. The entire assembly is held together by the bur end, i.e., the larger bore end, of the spindle being crimped closed.