Abstract: A cradle type adaptor for a magnet base drill which includes a box having a width slightly smaller than the width of the magnet base of the drill so that it can be assembled to the magnetic base by a clamping action. The box includes a pair of longitudinal sides and a pair of end sides. A front and rear vertically adjustable plate is adjustably mounted on the front and rear sides of the box. The front and rear adjustable plates have a V-slot in the lower ends thereof. The lower end of each of the longitudinal sides of the box is formed at an oblique angle so that the adjustable side plates may be adjustably mounted thereon for mounting the cradle pipe adaptor on a small size diameter pipe.

Abstract: An arbor for a rotary cutting tool which includes an elongated cylindrical shank that has an axial bore formed therethrough. The upper end of the shank is adapted to be attached to the drive spindle of an electric motor. The arbor shaft is slidably mounted in a carrier sleeve which is rotatable with the arbor shank which is retained against axial movement by a mounting means. An annular cutter is attached to the lower end of the arbor shank and a pilot ejector member is slidably mounted therein. The pilot ejector member is retained in the normal at rest position by a spring which has its upper end mounted in a bore in a piston that is attached to the carrier sleeve. The lower end of the spring engages a plunger member which maintains the pilot ejector member in its initial and other operative positions.