Abstract: A device for holding and securing a rotating tool to be attached to the spindle shaft of a machine tool, that can realize ultra-precise cutting or grinding work under conditions of high rotation speed and rapid feeding. A tool holder consists of an outer cylinder having a tapered outside peripheral surface which comes into contact with the inside peripheral surface in a tapered hole of a spindle shaft; an inner cylinder which fits in such a manner that the outer cylinder can slide in an axial direction; a retainer having an outer armor which is formed at the front end of the inner cylinder and can contact the top end of said spindle shaft; and an elasticity-accelerating member which imparts elastic force to the retainer such that the outer cylinder can move towards its base end.

Abstract: There is disclosed an automatic lubricating device for a remotely operable bowden cable which consists of an outer wire and an inner wire relatively frictionally slidably inserted in said outer wire and which is connected between operating means and actuating means so that the actuating means may be remotely operated by pulling the inner wire of the bowden cable, wherein an oil cover provided with an inner-wire receiving aperture is interposed between an outer-wire holding cap directly supporting the end of the outer wire and an oil cover attaching bracket fixed to one or each of said operating and actuating means, and lubricating oil is enclosed in a lubricating oil storage chamber formed in said oil cover, said lubricating oil being applied to the inner wire inserted in said inner-wire receiving aperture, the arrangement being such that the back and forth movement of the inner wire produced as a result of the operation of the operating means is utilized to cause said lubricating oil to flow along the relati