Abstract
BT standard tooling is a tooling interface that is held with a 7/24 taper. A gap exists between the spindle nose and the tool flange when the tooling is clamped. However, when users demands high speed and high precision machining capabilities, and when the cutting tools for high speed is being developing, the serious problems become clear on 7/24 taper standard tooling. We introduce 1/10 short taper, taper & flange double face contact tooling "NIKKEN NC5 Tooling System" for the high speed and high precision machining.