Methods and structures for forming anodization layers that protect and cosmetically enhance metal surfaces are described. In some embodiments, methods involve forming an anodization layer on an underlying metal that permits an underlying metal surface to be viewable. In some embodiments, methods involve forming a first anodization layer and an adjacent second anodization layer on an angled surface, the interface between the two anodization layers being regular and uniform. Described are photomasking techniques and tools for providing sharply defined corners on anodized and texturized patterns on metal surfaces. Also described are techniques and tools for providing anodizing resistant components in the manufacture of electronic devices.

A rotary tool according to an aspect includes a body, a flank face positioned at a side of a tip end of the body, a flute extending from the flank face toward a rear end of the body, and a ridge line positioned at an intersection of the flank face and the flute. The ridge line includes a recessed portion recessed toward the rear end of the body, an inner edge extending from the recessed portion toward the tip end of the body, and an outer edge extending from the recessed portion toward an outer periphery of the body. The flute includes a recessed groove extending along the outer edge. The recessed groove is connected to the recessed portion and the outer edge, and is separated from the inner edge.

A cutting tool includes a grip part and a cutting part. In the grip part and the cutting part, a channel for guiding fluid supplied from the outside to an outflow port is formed. The channel includes: a first channel extending in parallel to a rotational center axis and linearly from an end part of the grip part on an opposite side to the cutting part; and a second channel extending linearly from the first channel toward a cutting edge of a cutting insert. The first channel is formed such that a center axis thereof is decentered so as not to match the rotational center axis.

Cutting tools (14) and cutting tool assemblies (10) include a friction ring (79). The friction ring (79) is provided in (disposed/secured within) a retaining groove (32) of a shank (30) of the cutting tool (14). The friction ring (79) can be formed from a resilient material or materials (150). The friction ring (79) can be secured in the retaining groove (32) by a retainer ring (80). The cutting tools (14) can also include a shank (30) having an increased diameter to provide increased strength and allow for a heavier cutting portion (28) of the cutting tool (14). The cutting tools (14) and cutting tool assemblies (10) can also include a washer (100) fitted about the shank (30) and positioned adjacent to a back side (26) of the cutting portion (28) of the cutting tool (14) for stabilizing the cutting tool body (22) in relation to a cutting tool holder (12).

A cutting tool includes: a rake face; a flank face continuous to the rake face; and a cutting edge formed by a ridgeline between the rake face and the flank face. The cutting tool includes: a base material having a first face on a side of the rake face and a second face on a side of the flank face; and a diamond layer covering the first face and the second face. The first face includes: a first top face continuous to the second face; and a second top face continuous to the first top face and disposed such that the first top face is sandwiched between the second top face and the second face. An angle formed between the first top face and the second top face is a negative angle in a cross section perpendicular to the cutting edge.

Various components of an electronic device housing and methods for their assembly are disclosed. The housing can be formed by assembling and connecting two or more different sections together. The sections of the housing may be coupled together using one or more coupling members. The coupling members may be formed using a two-shot molding process in which the first shot forms a structural portion of the coupling members, and the second shot forms cosmetic portions of the coupling members.

A bearingless groove router bit includes at least one cutting element affixed to a head of the router bit and has a first end spaced from an end of connected shank connected to the head and a second end adjacent to the second end of the head. The cutting element includes a cutting edge extending along the cutting element between the first end to the second end of the cutting element. The cutting edge may include a radial side edge that projects radially inwardly relative to a central axis of the router bit and a straight side edge that extends from an end of the radial side edge outwardly relative to the central axis to minimize tear out during cutting of a groove in a work piece.

When a closed type impeller is manufactured from one block, a rough cutting process of cutting a flow path region of a block using a rough cutting tool, and a residue-cutting process of cutting a cutting residue in the cutting process using a residue-cutting tool are executed. The residue-cutting tool has a tool main body having a blade formed on an outer periphery thereof, and a handle having the tool main body fixed to a distal end thereof. A maximum outer diameter of the tool main body is larger than a minimum outer diameter of the handle. Further, the tool main body has a rear blade directed in a direction including a tool rear side component.

A chamfer tool which comprises a tool holder. The tool holder extends along a central axis and comprises a plurality of slot-shaped cutting insert receptacles, each having two opposing lateral abutment surfaces and a base abutment surface arranged between the two lateral abutment surfaces and extending transversely thereto. The chamfer tool further comprises a plurality of cutting inserts, which are fixed in the plurality of cutting insert receptacles in a firmly bonded manner, wherein each of the cutting inserts comprises two opposing lateral surfaces, which abut against or are connected in a firmly bonded manner to the two lateral abutment surfaces of the respective cutting insert receptacle, and a lower surface arranged between the two lateral surfaces and extending transversely thereto, wherein the lower surface abuts against or is connected in a firmly bonded manner to the base abutment surface of the respective cutting insert receptacle. The cutting inserts project out of the first cutting insert receptacles both in an axial direction, which is parallel to the central axis of the tool holder, and transversely to the axial direction. Each of the cutting inserts comprises a main cutting edge which is oriented at a first acute angle to the central axis of the tool holder.

A milling tool is configured from a shank part and a head with a cutting edge that is provided on the leading end of the shank part. The head comprises an expanding diameter section, the diameter of which expands gradually from the base end that contacts the shank part in the direction of the leading end, and a decreasing diameter section, the diameter of which gradually decreases from the maximum diameter section in the direction of the leading end. At least one cutting edge is provided on each of the expanding diameter section and the decreasing diameter section.