A cutting tool includes a tubular body made of a composite material, such as carbon reinforced fiber polymer (CFRP). A front support structure comprising a central hub and a plurality of spokes extending radially outward from the central hub is attached proximate the front end of the tubular body. A rear support structure comprising a central hub and a plurality of spokes extending radially outward from the central hub is attached proximate the rear end of the tubular body. Cartridge supports are attached directly to one of the front and rear support structures. A rear machine connection member is attached to the rear support structure for providing coolant to the front and rear support structures. The CFRP tubular body increases the stiffness to weight ratio of the cutting tool.

A machine reaming tool includes a base body with a plurality of insert receivers with cutting inserts that are inserted therein. The cutting inserts are inserted into insert receivers that each form a linear guide of the cutting inserts in a direction orthogonal to a rotation axis of the machine reaming tool. The linear guide is a prismatic sliding guide such as a dovetail guide. In particular, the dovetail guide is designed asymmetrically.

A rotary cutting tool includes a tool body and a cutting edge tip provided at the tool body. At least one first groove is provided in a rake face of the cutting edge tip, the first groove has a portion inclined with respect to a rotation axis, and a front end of the first groove is provided at a front cutting edge. A rear end of the first groove is provided on an inner side with respect to an outer peripheral cutting edge, and an irregularity of the outer peripheral cutting edge is 30 μm or less.

A rotary cutting tool includes a tool body and a cutting edge tip provided at the tool body. At least one first groove is provided in a rake face of the cutting edge tip, the first groove has a portion inclined with respect to a rotation axis, and a front end of the first groove is provided at a front cutting edge. A rear end of the first groove is provided on an inner side with respect to an outer peripheral cutting edge, and an irregularity of the outer peripheral cutting edge is 30 μm or less.

A cutting tool with interconnected arms that increases the stiffness to weight ratio of the cutting tool is described. The principles of the invention can be applied to any cutting tool, such as a reamer, a milling cutter, a slotting cutter, and the like. In one example, a cutting ring includes a cutting head assembly with a leading arm, a trailing arm, and a cutting head supported by the leading arm and the trailing arm. The trailing arm interconnects with the leading arm of an adjacent cutting head assembly, and the leading arm interconnects with a trailing arm of another adjacent cutting head assembly. As a result of this interconnection of arms, the axial, radial and tangential stiffness to weight ratio of the cutting tool is increased. A support member may be included to further increase the stiffness to weight ratio.

A cutting tool with interconnected arms that increases the stiffness to weight ratio of the cutting tool is described. The principles of the invention can be applied to any cutting tool, such as a reamer, a milling cutter, a slotting cutter, and the like. In one example, a cutting ring includes a cutting head assembly with a leading arm, a trailing arm, and a cutting head supported by the leading arm and the trailing arm. The trailing arm interconnects with the leading arm of an adjacent cutting head assembly, and the leading arm interconnects with a trailing arm of another adjacent cutting head assembly. As a result of this interconnection of arms, the axial, radial and tangential stiffness to weight ratio of the cutting tool is increased. A support member may be included to further increase the stiffness to weight ratio.

A reamer has a shank made of steel and a cutting body made of a harder material, wherein the cutting body forms the outer circumference of the reamer in the region of the workpiece side end and has all the cutting ribs.

A reamer has a shank made of steel and a cutting body made of a harder material, wherein the cutting body forms the outer circumference of the reamer in the region of the workpiece side end and has all the cutting ribs.

To make it possible for bores (16) that are in line with one another to be efficiently worked by means of a boring bar (2), the boring bar has a main body (10) with an axis of rotation (R) and a number of cutting elements (12, 12A) at intervals from one another in the axial direction (4) and also guiding elements (14) for guiding the main body (10) in a guiding bore (16A). The guiding elements (14) are kept at a distance from the axis of rotation (R) equivalent to a guide radius (r1). The main body (10) is divided into a functional region (19) and an eccentric region (10), wherein the cutting elements (12, 12A) and the guiding elements (14) are arranged such that they are distributed around the main body (10) over an angular range (a) of less than 180°. Furthermore, the circumferential side (22) of the main body (10) can be passed eccentrically through a respective bore (16, 16A) of which the unworked tube radius (r2) is less than the guide radius (r1).

A drilling tool with: a shaft; a seat at one end of the shaft; a drill bit, which is arranged on the seat; and a clamping section, which is provided on the shaft and can interact with the drill bit. Also provided is a tensioning screw, which is screwed into the shaft and comprises an expanding section as well as a contact section. The expanding section interacts with the clamping section, and the contact section interacts with the drill bit.