A helical blade cutter including multiple linear blades attached to an outer circumferential surface of a round body having an outer surface formed into a cylindrical circumferential surface. The blades tilt to a given helix angle α from a straight line on the outer circumferential surface parallel to a rotational central axis O. Blade attachment surfaces are formed on the outer circumferential surface of the round body at given intervals in the circumferential direction. The blade attachment surfaces tilt to an angle same as the helix angle α of the blade while tilting to a rake angle β in a direction of an elevation angle from a tangent to the outer circumferential surface. The blades are each attached to a blade attachment part through intervention of a chip holder that allows detachment of the blade.

A disposable multi-edge carving blade contains a first end and a second end which are symmetrical to each other and are connected together so as to form a V-shaped end portion of the carving blade, wherein the first end of the carving blade has a first side face defined thereon, and the second end of the carving blade has a second side face formed thereon, the carving blade also includes two chip removing grooves correspondingly arranged beside a distal end of the V-shaped end portion thereof, and each chip removing groove has a cutting face defined on a bottom end thereof and intersecting with a rotation axis of the carving blade so that at least two cutting edges are oppositely defined beside the rotation axis.

A cutting insert includes a base body and a coating layer, and also includes a rake surface, a flank surface, and a cutting edge located along an intersecting ridge therebetween. The rake surface includes an outer peripheral part and a middle part protruded relative to the outer peripheral part. The middle part includes a constraining surface. The outer peripheral part includes a first breaker part, a second breaker part, and the third breaker part adjacent to the constraining surface. The constraining surface is configured by the base body and the coating layer does not exist at the constraining surface. A skewness Rsk of a roughness curve at the constraining surface is −1.5 μm to −0.5 μm. A skewness Rsk at the third breaker part is −0.2 μm or less. The skewness Rsk at the constraining surface is smaller than the skewness Rsk at the third breaker part.

A cutting insert includes a base body and a coating layer, and also includes a rake surface, a flank surface, and a cutting edge located along an intersecting ridge therebetween. The rake surface includes an outer peripheral part and a middle part protruded relative to the outer peripheral part. The middle part includes a constraining surface. The outer peripheral part includes a first breaker part, a second breaker part, and the third breaker part adjacent to the constraining surface. The constraining surface is configured by the base body and the coating layer does not exist at the constraining surface. A skewness Rsk of a roughness curve at the constraining surface is −1.5 μm to −0.5 μm. A skewness Rsk at the third breaker part is −0.2 μm or less. The skewness Rsk at the constraining surface is smaller than the skewness Rsk at the third breaker part.

A cutting insert (20) for a milling cutter (10) is described, wherein the cutting insert (20) comprises a first main surface (22) for abutment against a stop surface (24) oriented substantially perpendicular to the direction of rotation of the milling cutter (10), a second main surface (26) which is opposite to the first main surface (22), which comprises the cutting surface, and a lateral surface (28) which connects the first main surface (22) with the second main surface (26) and which comprises the free surface. The lateral surface (28) has at least one clamping section (38) by which the cutting insert (20) is clamped in a recess (18) in a tool body (12) by means of a clamping element (40), in particular wherein the cutting insert (20) is a turning cutting insert. Furthermore, a milling cutter (10) is described.

A cutting insert (20) for a milling cutter (10) is described, wherein the cutting insert (20) comprises a first main surface (22) for abutment against a stop surface (24) oriented substantially perpendicular to the direction of rotation of the milling cutter (10), a second main surface (26) which is opposite to the first main surface (22), which comprises the cutting surface, and a lateral surface (28) which connects the first main surface (22) with the second main surface (26) and which comprises the free surface. The lateral surface (28) has at least one clamping section (38) by which the cutting insert (20) is clamped in a recess (18) in a tool body (12) by means of a clamping element (40), in particular wherein the cutting insert (20) is a turning cutting insert. Furthermore, a milling cutter (10) is described.

An elongated tool holder includes a tool anti-vibration component having a mass housing portion and an anti-vibration arrangement. The anti-vibration arrangement includes an enclosed interior holder cavity formed in the mass housing portion. The anti-vibration arrangement also includes a vibration absorbing mass disposed within the holder cavity and elastically suspended therein by at least three non-torus shaped, resilient suspension members contacting an inwardly facing cavity wall surface. A cutting tool is provided with the tool holder.

A method of milling a piece of raw steel stock comprising: arranging a minimum of four solid pole extensions on top surface segments of a magnetic chuck such that the solid pole extensions are relatively evenly distributed under a piece of raw steel stock and within 2 inches of a perimeter of the piece of raw steel stock; arranging multiple mobile pole extensions beneath the piece of raw steel stock and on every other top surface segment of the magnetic chuck under the piece of raw steel stock that is not occupied by the solid pole extensions but beneath the piece of raw steel stock, each of the multiple mobile pole extensions having a biased top portion that contacts the piece of raw steel stock; and milling the piece of raw steel stock with a face mill that generates steel chip as swarf.

A cutting insert may include a first surface having a polygonal shape, a second surface, and a cutting edge located on a ridge line where the first surface intersects with the second surface. The first surface may include a first corner, a second corner, a third corner, a first side, and a second side. In a plan view of the first surface, the first side may have a straight line shape or a convex shape protruded outward relative to a first imaginary line connecting the first corner and the second corner, and the second side may have a concave shape recessed inward relative to a second imaginary line connecting the first corner and the third corner.

A cutting insert may include a first surface having a polygonal shape, a second surface, and a cutting edge located on a ridge line where the first surface intersects with the second surface. The first surface may include a first corner, a second corner, a third corner, a first side, and a second side. In a plan view of the first surface, the first side may have a straight line shape or a convex shape protruded outward relative to a first imaginary line connecting the first corner and the second corner, and the second side may have a concave shape recessed inward relative to a second imaginary line connecting the first corner and the third corner.