A pen milling device and a method for milling pen blanks therewith. The device has a body selectively engageable with a rotating apparatus. A replaceable cutter is engaged with the body such that a cutting edge thereof extends outwardly beyond the body's end surface. The cutter has multiple cutting edges and may be reoriented relative to the body if a presented cutting edge becomes dull or damaged. A reamer extending outwardly from the body includes at least one flute. As the device is rotated, the cutter removes material from a pen blank and the reamer removes dried adhesive from a bore of a pen tube secured within a hole defined in the pen blank The device removes all of the pen material extending between an end of the pen blank and an associated end of the pen tube.

A pen milling device and a method for milling pen blanks therewith. The device has a body selectively engageable with a rotating apparatus. A replaceable cutter is engaged with the body such that a cutting edge thereof extends outwardly beyond the body's end surface. The cutter has multiple cutting edges and may be reoriented relative to the body if a presented cutting edge becomes dull or damaged. A reamer extending outwardly from the body includes at least one flute. As the device is rotated, the cutter removes material from a pen blank and the reamer removes dried adhesive from a bore of a pen tube secured within a hole defined in the pen blank The device removes all of the pen material extending between an end of the pen blank and an associated end of the pen tube.

It is an object to provide a rotating tool having an excellent wear resistance. The rotating tool includes: a base member including a cutting edge portion and a flute portion; and a coating film that coats a surface of the base member, a ratio B/A of a film thickness B of the coating film coating a surface of the flute portion to a film thickness A of the coating film coating a surface of the cutting edge portion being not less than 0.8.

A surface-coated tool includes a substrate and a coating film formed on the substrate. The coating film includes an alternate layer in which one or more A layers and one or more B layers are alternately stacked. The A layer and the B layer each have a thickness not smaller than 2 nm and not greater than 100 nm. An average composition of the A layer is expressed as TiaAlbSicN (0.5<a<0.8, 0.2<b<0.4, 0.01<c<0.1, a+b+c=1), an average composition of the B layer is expressed as TidAleSifN (0.4<d<0.6, 0.3<e<0.7, 0.01<f<0.1, d+e+f=1), and a condition of 0.05<AD0.2 AND 0.05<EB0.2 is satisfied.

It is an object to provide a rotating tool having an excellent wear resistance. The rotating tool includes: a base member including a cutting edge portion and a flute portion; and a coating film that coats a surface of the base member, a ratio B/A of a film thickness B of the coating film coating a surface of the flute portion to a film thickness A of the coating film coating a surface of the cutting edge portion being not less than 0.8.

A coated cutting tool has a base material of a WC-based cemented carbide and a film formed on the surface of the base material by a chemical vapor deposition method. The coated cutting tool has a rake face, a flank face and a cutting edge ridgeline part positioned between the rake face and the flank face being provided, wherein a total film thickness of the entire film is 3 to 20 m in an average film thickness, and one or more oblique cracks where an extension angle of the crack to the surface of the film is 45 or less are present at the rake face within 300 m from the cutting edge ridgeline part.

A hard and wear resistant coating for a body includes at least one metal based nitride layer having improved high temperature performance. The layer is (Zr1-x-zSixMez)Ny with 0<x<0.30, 0.90<y<1.20, 0z<0.25, and Me is one or more of the elements Y, Ti, Nb, Ta, Cr, Mo, W and Al, comprised of a single cubic phase, a single hexagonal phase or a mixture thereof, with a cubic phase of a sodium chloride structure and a thickness between 0.5 m and 15 m. The layer is deposited using cathodic arc evaporation and is useful for metal cutting applications generating high temperatures.