Abstract: A quick-change adapter which allows the precise positioning of a working member such as a tool, a workpiece or the like with respect to a machining device has a precision of one or two ten-thousandths of an inch. The adapter includes first and second holders affixed to the working member and the machining device. Each of the first and second holders includes a mating surface, configured as a helical face gear or as a cylindrical stud and recess. A shank extends from the first holder and has a V-shaped notch on which pins on the second holder abut, so as to draw the first and second holder engagement surfaces into firm abutment. The pins are preferably driven by a floating cam ring carried by the second holder, so that positioning of the holders with respect to one another is determined substantially only by the engagement surfaces. Misalignment of the holder due to movement caused by non-axial drawing on the shank is eliminated.

Abstract: A blade clamping device for securing a blade assembly on a rotary cutting tool having a body formed with a cylindrical surface concentric with the axis of the cutting tool. The clamping device selectively locks the blade assembly in position along a radially disposed track which is defined by an elongated slot extending radially from the cutting tool body's outer diameter to its inner bore and a key-shaped channel formed inwardly of the elongated slot's bottom wall. A ball head screw is slidingly retained in the key-shaped channel such that its threaded shank is held in threaded engagement with a threaded aperture formed in the blade assembly in order to provide a means to selectively clamp the blade assembly in position along the elongated slot.

Abstract: Radial adjustment of cutter blades in a roughing hypoid gear cutter is effected by a tapered adjustment block. A differential screw engages threads in the block and in the cutter body to cause relative axial displacement. The taper on the adjustment block in cooperation with a tapered surface on the cutter body translates the axial displacement into a radial displacement of the upper surface of the adjustment block and the corresponding cutter blade. A pair of cap screws permit independent axial adjustment of each cutter blade. A one piece cutter body provides maximum simplicity and rigidity.