Patent ID: 8360695

Claim:
An interface between a shank tool arranged in a tool holder, the shank tool comprising a machining section, a shank comprising a cylindrical clamping section and a conical shank end on the side facing away from the machining section and at least one internal lubricant duct comprising an orifice, the orifice located in the tapered surface of the shank end outside of the shank axis and a lubricant transfer area provided in the tool holder, the lubricant transfer area comprising an inner recess, the inner recess narrowing in the direction of a centrical lubricant feed pipe, said inner recess defining an inner cone, the inner cone supporting the conical shank end radially outside of the orifice, characterized in that the conical shank end and the lubricant transfer area including a funnel-shaped lubricant transfer chamber, the funnel-shaped lubricant transfer chamber extending between the centrical lubricant feed pipe and a tapered surface contact area between the inner cone of the lubricant transfer area and the conical shank end.