Abstract: A tool for machining workpieces, having a shank and a cutting insert having a base body held in the shank. The shank has a slot accommodating the cutting insert. The body has a central section with a central axis. At least one convexly bowed centering surface running in the direction of the central section. At least one drive element originates from the central section. The slot in the shank has at least one interior surface region shaped to cooperate with the at least one centering surface.

Abstract: A drill bit having a shank portion and a cutting portion, which cutting portion generally has at least one cutting edge and a chip flute that has a helical portion. The drill bit has at least one straight coolant channel that has a coolant exit orifice disposed at least partially in the flute and oriented toward the cutting edges to supply coolant thereto to cool the cutting edges and chips produced during a cutting operation.

Abstract: Boring tool and a cutting insert therefor. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: This invention relates to a boring tool having a cutting insert. The insert has a chip breaker with a base that extends from the secondary cutting edge to the primary cutting edge. The primary cutting edge, which is also referred to below as the major cutting edge, thereby runs diagonally with respect to the insert surface or top face of the indexable insert toward the chip breaker base of the chip breaker. The secondary cutting edge, which is also referred to as the minor cutting edge below and is advantageously straight, descends toward the major cutting edge, as a result of which a wiper geometry is realized on the minor cutting edge. Therefore the major cutting edge and the minor cutting edge preferably form a closed triangle with the chip breaker base.

Abstract: Boring tool and a cutting insert therefor. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: A drill bit having a shank portion and a cutting portion, which cutting portion generally has at least two cutting edges, each with an at least partially spiraled or helical flute extending therefrom to the shaft portion. The drill bit has coolant channels that extend from the shaft portion and run substantially straight. The coolant channels have outlet openings that are arranged in the flutes and oriented toward the cutting edges. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims.

Abstract: Disclosed is a drilling tool comprising a first drill bit (2) that is provided with at least two forward cutting edges (4, 5) and a second drill bit (3) which encompasses at least two rear cutting edges (6, 7). A cutting groove (8, 9) runs continuously from one respective forward cutting edge (4, 5) to a rear cutting edge (6, 7). Said cutting groove (8, 9) is embodied in an asymmetric manner in an area (A) bordering the forward drill bit (2), in a symmetric manner in a central area (B), and asymmetric in an area (C) bordering the rear drill bit (3).

Abstract: A twist drill, having a replaceable drill tip, comprising a drill bit shaft (1), a cutting insert (2) which is detachably fixed thereto and which forms the tip area of the twist drill, and comprises a flute (3) that continues into the cutting insert (2). The cutting insert rests, with a bearing surface (6) extending orthogonal to the center longitudinal axis (8) of the drill bit, on the face (7) of the drill bit shaft (1) and extends with a fixing stud (9), which centrally protrudes from the bearing surface (6), into a receiving recess (10) which is configured complementary thereto and which is provided in the face (7) of the drill bit shaft (1).

Abstract: On a drill with a base body and a replaceable cutting insert, the cutting insert lies in a receptacle that runs through the base body at a right angle to the latter's longitudinal axis and is open toward the drill tip, whereby the cutting insert is in contact by means of two diametrically opposite contact surfaces against the side walls of the receptacle. Between each contact surface of the cutting insert and a side wall of the receptacle, there is a groove that extends in the direction of the longitudinal axis, in which groove a clamping wedge sits with a form-fit and a friction-fit, and interacts with the base body and the cutting insert in the manner of a self-locking device that acts toward the drill tip.

Abstract: A twist drill, having a replaceable drill tip, comprising a drill bit shaft (1), a cutting insert (2) which is detachably fixed thereto and which forms the tip area of the twist drill, and comprises a flute (3) that continues into the cutting insert (2). The cutting insert rests, with a bearing surface (6) extending orthogonal to the center longitudinal axis (8) of the drill bit, on the face (7) of the drill bit shaft (1) and extends with a fixing stud (9), which centrally protrudes from the bearing surface (6), into a receiving recess (10) which is configured complementary thereto and which is provided in the face (7) of the drill bit shaft (1).

Abstract: A twist drill, having a replaceable drill tip, comprising a drill bit shaft (1), a cutting insert (2) which is detachably fixed thereto and which forms the tip area of the twist drill, and comprises a flute (3) that continues into the cutting insert (2). The cutting insert rests, with a bearing surface (6) extending orthogonal to the center longitudinal axis (8) of the drill bit, on the face (7) of the drill bit shaft (1) and extends with a fixing stud (9), which centrally protrudes from the bearing surface (6), into a receiving recess (10) which is configured complementary thereto and which is provided in the face (7) of the drill bit shaft (1).

Abstract: On a drill with a base body and a replaceable cutting insert, the cutting insert lies in a receptacle that runs through the base body at a right angle to the latter's longitudinal axis and is open toward the drill tip, whereby the cutting insert is in contact by means of two diametrically opposite contact surfaces against the side walls of the receptacle. Between each contact surface of the cutting insert and a side wall of the receptacle, there is a groove that extends in the direction of the longitudinal axis, in which groove a clamping wedge sits with a form-fit and a friction-fit, and interacts with the base body and the cutting insert in the manner of a self-locking device that acts toward the drill tip.

Abstract: Proposed is a drilling tool for drilling in solid material, having a base body (1) containing chip flutes (5, 5a) and at least two interchangeable inserts (3, 3a) at the face of the base body (1). The inserts are arranged on the base body at different radial distances such that their working ranges partially overlap. The blades (12) of the inserts (3, 3a) are formed by two cutting edges (8, 9) which together form an obtuse angle, that is the point angle (11). The face (13) of the blades (12) has parallel profile ribs (14, 14a) which act as runners and which in the region of the cutting edges (8, 9), aligned in the direction of chip removal, extend radially inwards over a curved course relative to their installed position, toward a flank region (17) of the insert (3, 3a) near the drilling tool axis (7).

Abstract: Proposed is a drilling tool for drilling in solid material, having a base body (1) containing chip flutes (5, 5a) and at least two interchangeable inserts (3, 3a) at the face of the base body (1). The inserts are arranged on the base body at different radial distances such that their working ranges partially overlap. The blades (12) of the inserts (3, 3a) are formed by two cutting edges (8, 9) which together form an obtuse angle, that is the point angle (11). The face (13) of the blades (12) has parallel profile ribs (14, 14a) which act as runners and which in the region of the cutting edges (8, 9), aligned in the direction of chip removal, extend radially inwards over a curved course relative to their installed position, toward a flank region (17) of the insert (3, 3a) near the drilling tool axis (7).

Abstract: A rotary tool for drilling and chamfering, which takes place in one common advance, essentially comprises a base body, a drill clamped centered therein and a chamfering tool disposed on the end of the base body toward the drill tip and having a cutter body tip disposed next to the flank of the lateral free face of the drill. The chamfering tool can be radially adjusted in relation to the drill in a direction pointing at right angles in respect to the drill axis.

Abstract: A drill with a drill point part that contains the drill cutter and is made of a solid hard material. The drill point part is replacably attached to the end face of a drill shaft. The drill shaft is penetrated by a shaft groove which extends in an axial direction of the shaft to accomodate the drill point part and can center the drill point part in the groove region. The drill shaft has grooves on its periphery which run in the axial direction and extend into the region of the shaft groove and continue into the region of the drill point part. The drill point part can be clamped on its side faces corresponding to and opposite the groove flanks in a force-locking manner by an insertion-clamping fit in the shaft groove.

Abstract: A drilling tool, in particular a drill, has replaceable cutting elements that form the cutting edges, and chip-removing flutes. A chip shaping area (22) at least partially made of a more wear-resistant material than the drill body itself is arranged next to the faces (11) of the main cutting edges (5) approximately in the chip flow direction. In another embodiment, the chip shaping area if made of the same material as the drill body and is subjected to a subsequent local hardening process that makes it wear-resistant.

Abstract: Guide element for a cutting tool having a location hole (20) in the tool shank (4) having an internal thread (16, 10), which has a threaded bolt (14) having an external thread that can be screwed into the internal thread (16, 10) and is spring mounted in the screw-in direction when screwed in, and a guide head (13) fixed to a free end of the threaded bolt (14) and operating in the manner of a sliding rail.

Abstract: The invention pertains to a drilling tool for drilling in solid metal. It comprises a base body with flutes for chip removal and two interchangeable inserts (1) designed especially as reset bits, having the same shape and size and being arranged in a recess at the end of a flute at the front of the base body. The inserts (1) are situated at different radial distances from the drilling tool axis (30) with overlapping work ranges. The blade (4,4a) of the insert (1) is formed by two cutting edges (10, 10a) and (14, 14a) which together form an obtuse point angle (18). The insert (1) is characterized by an extended form in its longitudinal direction L with channel-like troughing of its faces (3) running essentially in the longitudinal direction and by an arrangement of the blades (4,4a) at the channel ends. Furthermore, the channel has a base surface (9) which with its longer parallelogram sides (6,7) forms an acute angle (8) with the longitudinal axis (2) of the insert (1).

Abstract: A twist drill having a longitudinal axis and major flanks ground by helical face grinding by means of a grinding wheel having a grinding face perpendicular to its axis of rotation and a circumferential profile, each major flank terminating in a cutting edge and having a surface which defines a clearance angle relative to the cutting edge wherein: the drill has an outer diameter and a central solid core having a thickness equal to 25% to 40% of the outer diameter; and each major flank is ground by a grinding operation performed by rotating the grinding wheel while its grinding face forms the major flank, effecting angular movement of the drill about its longitudinal axis and relative to the axis of rotation of the grinding wheel, effecting relative radial movement between the grinding wheel and the drill in the direction perpendicular to the drill axis and away from the axis of rotation of the grinding wheel, and effecting axial movement of the drill along its longitudinal axis toward the grinding wheel in a p