A replaceable milling head rotatable in a cutting direction about a longitudinal central axis, the central axis defining a forward direction and an opposite rearward direction, has a forward cutting portion and a rear threaded coupling portion for coupling to a shank. The cutting portion includes two or more key actuating portions which assist in mounting the milling head onto the shank. The cutting portion includes a plurality of helical chip flutes alternating with cutting edges. At least one or more of the cutting edges and flutes extend axially rearward of at least a portion of the key actuating portions.

A rotary tool can be adapted for removing material from a workpiece such as a lower receiver. A rotary tool can have an adapter with a major diameter, and a cutter head with a minor diameter. The major diameter of the adapter can reduce deflection and chatter, while the minor diameter of the cutter head can be used to manufacture lower receivers with accuracy. The rotary tool can be adapted to be engaged with a rotary power tool.

A rotary cutting tool that implements a chip space in proportion to a feed-per-tooth is proposed. The rotary cutting tool includes a cutting part in which a plurality of cutting teeth and flutes are alternately formed, wherein a cross-section of the cutting part perpendicular to a central axis is divided into a plurality of cutting tooth spaces defining a section between cutting edges of adjacent cutting teeth on the basis of the central axis, such that all of the cutting tooth spaces are designed in different sizes, or some of the plurality of cutting tooth spaces are set in different sizes from the other cutting tooth spaces.

An end-mill comprising a shank and a cutting portion along its longitudinal axis, and formed by combining ceramic and metal based materials via a brazing method. The cutting portion includes a cutting diameter varying between 2 to 20 mm, at least one web thickness found at a blade part, at least one helix angle having a cutting edge thereon, a core diameter that is at least 0.7 times the cutting diameter, at least one corner radius found at the tip part of the blades between the flutes, and axial and radial rake angles at which a cutting operation is made. TiAlN coating is applied over the ceramic-metal based end-mill by a PVD method in order to extend the service life of the end-mill, increase abrasion resistance, and minimize the welding (sticking) problem of chips on the cutting tools.

A tool body for a milling tool includes a front end and a rear end between which a center axis and a peripheral envelope surface extend. The tool body is arranged to be rotated in a direction of rotation around the center axis. At least one insert seat is configured to support a cutting insert. A chip pocket is provided in front of the insert seat in the direction of rotation, delimited by a wall surface. A surface pattern including a plurality of first grooves and second grooves is formed on at least a portion of the wall surface. The second grooves intersect the first grooves and each groove of the first grooves and/or each groove of the second grooves has a concave groove profile.

A rotary cutting tool is provided that includes a shank and a body. The body extends axially outwardly from the shank, and has a plurality of first teeth and a plurality of second teeth. The first and second teeth are alternately arranged and spaced apart from one another around a circumference. Each first tooth includes a primary cutting edge disposed at a primary angle relative to the rotational axis and a tertiary cutting edge disposed at a tertiary angle relative to the rotational axis. Each second tooth includes a secondary cutting edge disposed at a secondary angle relative to the rotational axis. The secondary cutting edge is disposed axially between the primary cutting edge and the tertiary cutting edge.

A blank for a shaft milling tool having a generally cylindrical body of solid carbide, a rear portion and a front portion, the periphery of which front portion being designed for chip flutes to be formed therein, is made according to a method including the step of providing at least two separate green bodies having at least one axially extending inner channel, which are fitted together along a common interface and sintered together to form a unitary body. For a more economic production of blanks with radially extending channels at least one generally radially extending channel is formed in at least one of the connecting surfaces before sintering the bodies together. The channel is formed with its radially inner end configured for fluid communication with the axial channel and with a radial extension to a position corresponding to at least 40% of the outer radius of the blank.

Broadly contemplated herein, in accordance with at least one embodiment, is a multi-flute end mill configuration that maintains circumferential spacing between the rake surface and clearance surface adjoining two adjacent end face cutting edges, respectively, regardless of the number of flutes and the desired end face configuration.

A milling tool, preferably a fir tree cutter, having an operating area which is rotatable about an operating axis of rotation for milling a workpiece and comprises a milling edge which extends transversely to the circumferential direction (U) of an operating axis of rotation, wherein the at least one milling edge includes at least one milling edge portion in which a milling edge profile (P), which is defined by the radial distance (F) between the milling edge and the operating axis of rotation along the milling edge, comprises a non-linear progression, wherein the milling edge in the milling edge portion comprises a chip space, which extends radially inward toward the operating axis of rotation in relation to the milling edge and comprises a chip space base which follows the milling edge profile (P) at least in portions in the milling edge portion with the non-linear milling edge profile (P).

A slotting tool body includes a disc-like cutter portion and a shank portion projecting rearwardly therefrom. The cutter portion includes a resilient clamping portion having a peripherally disposed insert receiving slot. The shank portion includes a peripherally disposed forward shank recess that is axially adjacent the cutter portion. A radially inward portion of the insert receiving slot merges in the rearward direction with the forward shank recess. A cutting insert is releasably and resiliently clamped in the insert receiving slot to form a rotary slot cutting tool. The cutting insert includes two cutting portions that each include a long and short insert lateral extension, the long insert lateral extension being longer than the short insert lateral extension. The longest insert lateral extensions are orated on opposite sides of the cutting insert.