The invention concerns a machining tool for machining fiber-reinforced materials such as CFRP, glass-fiber-reinforced plastics or plastics reinforced with polyester threads. The machining tool comprises a plurality of flutes (1, 2, 3, 4) which distance lands (5, 6, 7, 8), disposed about a cylinder core segment (9), from each other in the peripheral sense. At least one of the lands (6, 8) is designed as a premachining land (6, 8) and at least one other of the lands (5, 7) is designed as a postmachining land (5, 7), each comprising a peripheral working region extending along, or with a twist and in the form of a helical segment about, the tool axis. The working region of each premachining land (6, 8) is designed as a peripheral file with a plurality of teeth (10) which are incorporated in a cylinder surface segment-shaped outer surface of the working region, and provided in the working region of each postmachining land (5, 7) is a number of sharp cutting edges (11, 12, 13, 15) extending parallel to or with a twist and in the form of a helical segment about the tool axis. The invention is characterized in that the number of sharp cutting edges (11, 12, 13, 15) on at least one postmachining land (5, 7) comprises a plurality of cutting edges (11, 12) each provided on a peripheral casing groove, the casing grooves being incorporated in a cylinder surface segment-shaped outer face of the working region, parallel to each other and at a pitch relative to the flute (1, 3) leading at least one postmachining land (5, 7).

The invention concerns a machining tool for machining fiber-reinforced materials such as CFRP, glass-fiber-reinforced plastics or plastics reinforced with polyester threads. The machining tool comprises a plurality of flutes (1, 2, 3, 4) which distance lands (5, 6, 7, 8), disposed about a cylinder core segment (9), from each other in the peripheral sense. At least one of the lands (6, 8) is designed as a premachining land (6, 8) and at least one other of the lands (5, 7) is designed as a postmachining land (5, 7), each comprising a peripheral working region extending along, or with a twist and in the form of a helical segment about, the tool axis. The working region of each premachining land (6, 8) is designed as a peripheral file with a plurality of teeth (10) which are incorporated in a cylinder surface segment-shaped outer surface of the working region, and provided in the working region of each postmachining land (5, 7) is a number of sharp cutting edges (11, 12, 13, 15) extending parallel to or with a twist and in the form of a helical segment about the tool axis. The invention is characterized in that the number of sharp cutting edges (11, 12, 13, 15) on at least one postmachining land (5, 7) comprises a plurality of cutting edges (11, 12) each provided on a peripheral casing groove, the casing grooves being incorporated in a cylinder surface segment-shaped outer face of the working region, parallel to each other and at a pitch relative to the flute (1, 3) leading at least one postmachining land (5, 7).

A broken bolt extractor is disclosed having a counter clockwise cutting tip section for drilling a bore into a broken bolt, a tap section having counter clockwise orientated threads, an intermediate shaft section, a chuck end portion, and a channel formed in the tip section, the tap section, and the shaft section.

A broken bolt extractor is disclosed having a counter clockwise cutting tip section for drilling a bore into a broken bolt, a tap section having counter clockwise orientated threads, an intermediate shaft section, a chuck end portion, and a channel formed in the tip section, the tap section, and the shaft section.

An orthopedic screw extractor device including a shaft, an end portion about a first end of the shaft for securing to a handle, and a screw extracting tip about a second end of the shaft opposite the first end. The screw extracting tip further includes a generally frustoconical shape having a side at an angle of about 5 to 15 degrees relative to a longitudinal axis of the screw extracting tip. The screw extracting tip further includes first, second and third screw threads and first, second and third flutes circumferentially spaced about the screw extracting tip and extending across an entire length of the screw extracting tip. Each of the screw threads has a lead of about 0.07 to 0.12 inches, a pitch of about 0.02 to 0.04 inches, a thread angle of about 40 to 50 degrees, and a depth of about 0.01 to 0.02 inches.

A method of installing cable through material, for example, concrete, wood, masonry, plastic steel, or the like comprising a drill bit with a distal end having a hollow tip with an attachment mechanism for receiving the cable. The drill bit is drilled through the material, and left in place while the cable is attached to the proximal end of the drill bit. There is no need to remove the drill bit from the aperture or material to attach the cable thereto. After attachment to the drill bit, the cable is inserted through the aperture with the drill bit and removed from the drill bit after it passes through the material so it can be attached to a receiver device.

A method of installing cable through material, for example, concrete, wood, masonry, plastic steel, or the like comprising a drill bit with a distal end having a hollow tip with an attachment mechanism for receiving the cable. The drill bit is drilled through the material, and left in place while the cable is attached to the proximal end of the drill bit. There is no need to remove the drill bit from the aperture or material to attach the cable thereto. After attachment to the drill bit, the cable is inserted through the aperture with the drill bit and removed from the drill bit after it passes through the material so it can be attached to a receiver device.

A cross hole deburring tool which performs rotary cutting on a cross hole burr occurring on a cross ridgeline part between a through path and an inner circumferential surface of a spherically-shaped hollow part. A tool main body includes a tip part and a shank, and the tip part has a shape obtained by setting a diameter axis of a circle, setting an eccentric axis parallel to the diameter axis and away therefrom by a predetermined eccentric distance, setting a closed region in a bow shape formed of a line segment obtained by cutting the eccentric axis by the circle and a minor arc on the circle by defining this line segment as a chord, setting an outer surface shape of a bow-shaped solid of revolution formed by rotating this bow shape about the eccentric axis, and taking this outer surface shape as the shape of the tip part.

A cross hole deburring tool which performs rotary cutting on a cross hole burr occurring on a cross ridgeline part between a through path and an inner circumferential surface of a spherically-shaped hollow part. A tool main body includes a tip part and a shank, and the tip part has a shape obtained by setting a diameter axis of a circle, setting an eccentric axis parallel to the diameter axis and away therefrom by a predetermined eccentric distance, setting a closed region in a bow shape formed of a line segment obtained by cutting the eccentric axis by the circle and a minor arc on the circle by defining this line segment as a chord, setting an outer surface shape of a bow-shaped solid of revolution formed by rotating this bow shape about the eccentric axis, and taking this outer surface shape as the shape of the tip part.

A fastener extraction ratchet bit system for facilitating extraction of stripped fasteners by permitting attachment of extraction bits to an air drive ratchet. The system includes a driving tool and a fitting coupled to and extending from the driving tool. A drill socket is coupled to a drill bit wherein the drill bit is selectively couplable to the fitting such that the driving tool provides a driving force to the drill bit. An extraction socket is coupled to an extraction bit wherein the extraction bit is also selectively couplable to the fitting such that the driving tool provides the driving force to the extraction bit.