Abstract: A quick-connect drill bit assembly comprising a drive shank and a drill bit releasably attached to the drive shank, the drill hit being configured to bore a first hole in a bone through a drill guide. A portion of the drill bit is configured to remain within the first hole after the drive shank is detached therefrom, the drill bit being configured to prevent the drill guide from rotating with respect to the bone as a second hole is bored into the bone.

Abstract: A quick-connect drill bit assembly comprising a drive shank and a drill bit releasably attached to the drive shank, the drill hit being configured to bore a first hole in a bone through a drill guide. A portion of the drill bit is configured to remain within the first hole after the drive shank is detached therefrom, the drill bit being configured to prevent the drill guide from rotating with respect to the bone as a second hole is bored into the bone.

Abstract: A segmented orbital drill includes a segmented portion with a semi-finishing cutting portion and a plurality of finishing cutting portions. The semi-finishing cutting portion and finishing cutting portions are separated by grooves formed by a front wall and a rear wall. The segmented portion allows for a fresh cutting edge (i.e., rear wall of the groove) to be revealed as the orbital drill wears in the axial direction. The segmented portion also causes less contact with the workpiece, which reduces power consumption and minimizes deflection of the orbital drill. The segmented orbital drill also includes an optional pilot at one end of the drill, and a clearance neck portion between a shank and the segmented portion. A method of machining a workpiece using the segmented orbital drill is also disclosed.

Abstract: One non-limiting aspect of the present disclosure is directed to a multi-piece twist drill head. The multi-piece twist drill head includes a core piece formed from a first hard material, and a peripheral piece formed from a second hard material. The core piece and peripheral piece each comprise a cutting edge and are adapted to mate to provide a central region and a peripheral region, respectively, of the multi-piece twist drill head. A twist drill including the multi-piece twist drill head is also disclosed.

Abstract: A method of forming an opening in a layered structure includes providing a layered structure including a first layer and a second layer and a near-zero gap interface defined between the first layer and the second layer; providing an opening through the layered structure such that the opening extends through the first layer and the second layer; and working simultaneously the opening in the fay surface of the first layer and the opening in the fay surface of the second layer without separating the first layer and the second layer. An internal chamfering device is also disclosed.

Abstract: The invention relates to a tool for machining a workpiece, which tool is rotatable about a tool axis, having a tool shank and a tool head, which tool head comprises at least one land, at least one spiral point assigned to the land and at least one flute assigned to the land, wherein the flute has a left-hand helix and the spiral point is skewed to the left, or wherein the flute has a right-hand helix and the spiral point is skewed to the right.

Abstract: A tool and method for cutting a circular opening and retaining the cut portion. The tool comprises a shaft having at least one cutting thread and at least one tapping thread, or at least one cutting thread and at least one male screw thread, or only at least one tapping thread, or only at least one male screw thread, or a cutting tip and at least one tapping thread, or a cutting tip and at least one male screw thread, and a cutting member having at least one cutting bit radially displaced from the shaft. The shaft and the cutting member have a mutual rotational axis. An alternative tool has a spaced distance on the shaft between the cutting member and the at least one cutting thread and at least one tapping thread, or the at least one cutting thread and at least one male screw thread, or the at least one tapping thread, or the at least one male screw thread, or the cutting tip and at least one tapping thread, or the cutting tip and at least one male screw thread.

Abstract: A device for performing a plurality of operations on a workpiece has a combination tool holder and a rotatable spindle for retaining the tool holder. The combination tool holder has a central opening at its forward end for receiving a drill bit and a pair of forwardly extending bosses onto which a pair of cutting tools are received. A slot is provided in the tool holder dividing it into a pair of gripping elements receiving the drill bit, the gripping elements being forced together onto the drill bit when the tool holder is mounted in the spindle.

Abstract: A twist drill is provided with a countersink and collar assembly. The countersink includes a body with a face which cooperates with a similar face of the collar to trap a pair of balls between them. The faces being conical, enable the balls to be driven radially inward into the drill flutes by tightening the collar onto the countersink. A chip deflector is provided at the cutting edges of the countersink.

Abstract: A machining tool comprising a rotatable holder, a removable, axially adjustable leading element, such as a drill bit, mounted in the holder and a throw-away cutting insert mounted in a fixed, unadjustable position on the holder to fix the position of the cutting edge on the insert axially in relation to the leading element and the holder.