A drill bit includes a cutting head and a bit body. The cutting head has a tip and cutting parts. The bit body is connected to the cutting head and has a longitudinal axis extending through the tip. The bit body has chip discharge flutes. The cutting parts are disposed at different angular positions around the longitudinal axis. Each cutting part is concaved inwardly and bounds one of the chip discharge flutes. Each of the cutting parts includes a rake face that has a corner edge adjacent to a respective one of the chip discharge flutes. When a bottom of the cutting head is viewed in a direction parallel to the longitudinal axis of the bit body, the corner edge has an obtuse included angle.

A cutting tool includes a base material and a coating formed on the base material. The coating includes a hard layer. The hard layer includes a plurality of crystal grains having a sodium chloride-type crystal structure. When the angle of intersection between the normal direction to (001) plane that is a crystal plane of the crystal grain and the normal direction to the surface of the base material is measured, a proportion A of the crystal grains having the angle of intersection of 0 degree or more to less than 20 degrees is 50% or more. The length of 3 grain boundaries is 50% or more of the length of 3-29 grain boundaries and is 1% or more and 30% or less of the total length of all boundaries that is the sum of the length of 3-29 grain boundaries and the length of general boundaries.

A machining tool, in particular a drill carrier tool, includes a monolithic base body extending in the axial direction which, at least in one section, has a porous or grid-like core structure that is encased in a solid outer jacket. These measures allow less material to be used, while maintaining good mechanical properties. The porous or grid-like core structure is simultaneously used for transporting coolant. The base body is manufactured in particular by means of a 3D printing method.

A cutting tool holder of the present disclosure includes a bar-shaped main body. The main body includes a first pocket to receive a first insert, a second pocket to receive a second insert, a first groove extending from the first pocket, and a second groove extending from the second pocket. The first groove includes a second opening located on a rear side in a rotation direction, and the second groove includes a fourth opening located on a rear side in the rotation direction in a cross section orthogonal to a rotation axis. An angle 1 formed by the second opening and an outer peripheral surface of the main body is smaller than an angle 2 formed by the fourth opening and the outer peripheral surface of the main body in a cross section orthogonal to the rotation axis.

A cutting tool including a body, a blade, a feed shaft, and a locking member. The body defines an axis and is adapted to be received by a spindle of a power tool. The blade is removably supportable on the body and rotatable about the axis for cutting a workpiece. A feed shaft is removably supportable in the body and rotatable about the axis for engaging a workpiece, the feed shaft being mountable in the cutting tool to engage and at least partially restrain the blade. The feed shaft further includes an opening transverse to the axis. The locking member is engageable with the body and with the opening in the feed shaft. Advancement of the locking member into the opening tightens both the blade and the feed shaft to the body.

A combined drill and chamfer tool (13, 21) for producing boreholes (29) in a workpiece (28) and for subsequently producing a chamfer (30) on at least one bore edge of the borehole (29), comprising a drill bit (1), which is secured in a rotationally fixed manner in a base body (3), and at least one chamfering blade (4) arranged behind the drill bit (1) in the axial direction, said chamfering blade being mounted in a blade window (25) arranged in the drill shank (35) and spring-loaded so as to be displaceable transversely to the longitudinal axis of the combined tool (13, 21), wherein the drill body (13) comprising the drill bit (1) and the drill shank (35) is made of a solid hard metal material, and wherein a spring-loaded, displaceable control bolt (5) is located in a central longitudinal bore (36) of the solid hard metal drill, the front tip (15) of said bolt controlling the transverse displacement of the chamfering blade (4), which is transversely displaceable within the blade window (25).

A machining tool, in particular a drill carrier tool, includes a monolithic base body extending in the axial direction which, at least in one section, has a porous or grid-like core structure that is encased in a solid outer jacket. These measures allow less material to be used, while maintaining good mechanical properties. The porous or grid-like core structure is simultaneously used for transporting coolant. The base body is manufactured in particular by means of a 3D printing method.

The present disclosure relates to a cutting insert and an indexable drill. The cutting insert and the indexable drill according to the present disclosure are configured such that when the cutting insert is mounted on the indexable drill, the cutting insert is easily inserted into the indexable drill at the initial time, and strong coupling force is implemented between the indexable drill and the cutting insert at a point of time at which the cutting insert is completely mounted. In addition, the cutting insert, according to the present disclosure, has excellent rigidity, when compared to cutting inserts in the related art that perform identical/similar cutting processing, since a portion, which is weak in rigidity, is provided as a thick portion.

A cutting tool for cutting a hole into a fluid transportation pipe and for retaining a cutting chip is provided. The tool (1) comprises a main body (2) having an end which is prolonged by a tapered part (3), the tool (1) further comprising an accommodation space (11), the tool being configured to receive a cutting chip in the accommodation space (11) via an opening (10) which extends at least from a geometrical apex (5) of the tapered part (3) to the periphery of the main body (61), and the tool (1) further has a cutting edge (4) extending at least from the geometrical apex (5) of the tapered part (3) to the periphery of the main body (2) of the cutting tool (1). The main body (2) is made of a material that differs from a material of which the cutting edge (4) is made.

A front-loaded, side-activated modular drill includes a shank and a replaceable cutting insert installed on and engaging the tool shank. The shank has a pocket for supporting the cutting insert when the cutting insert is installed within the pocket. The pocket includes a first centering wall having an aperture with internal threads formed with a first pitch and a second centering wall having an aperture with a first portion with internal threads formed with a second, different pitch. A first member is threaded into the aperture of the first centering wall, and a second member is threaded into the second centering wall. The first member is threaded into the second member. The cutting insert has an opening in a trailing end for allowing the first member to pass therethrough. Rotation of the first member causes the centering walls to elastically deform and move relative to each other.