A cutting tool includes: a shank part; and a cutting part provided at one end of the shank part. The cutting part includes a first region provided at one end of the cutting tool, and a second region located closer to a center of the cutting tool than the first region. Abrasive grains adhere to the first region and the second region. An average grain diameter of the abrasive grains in the second region is smaller than an average grain diameter of the abrasive grains in the first region.

Metal bond abrasive articles and methods of making metal bond abrasive articles via a focused beam are disclosed. In an aspect, a metal bond abrasive article includes a metallic binder material having abrasive particles retained therein, where the abrasive particles have at least one coating disposed thereon. The coating includes a metal, a metal oxide, a metal carbide, a metal nitride, a metalloid, or combinations thereof, and the at least one coating has an average thickness of 0.5 micrometers or greater. The metal bond abrasive article includes a number of layers directly bonded to each other. Metal bond abrasive articles prepared by the method can include abrasive articles having arcuate or tortuous cooling channels, abrasive segments, abrasive wheels, and rotary dental tools. Further, methods are provided, including receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying a metal bond abrasive article; and generating, with the manufacturing device by an additive manufacturing process, the metal bond abrasive article based on the digital object. A system is also provided, including a display that displays a 3D model of a metal bond abrasive article; and one or more processors that, in response to the 3D model selected by a user, cause a 3D printer to create a physical object of the metal bond abrasive article.

A device for reforming a vessel cavity is provided that includes a central shaft, a central gear coupled to the central shaft, and a plurality of roller gears coupled to the central gear, with each of the plurality of roller gears having a central portion. A proximal support member couples the plurality of roller gears and at least one of the central gear and the central shaft. A plurality of rollers is also provided, each of the plurality of rollers connected to the central portion of each of the plurality of roller gears. In one form, at least one idler member is disposed between the plurality of rollers. A distal support member couples the plurality of rollers and at least one of the central gear and a translation member. Also, a stationary member is secured to a distal portion of the vessel cavity.

A device for reforming a vessel cavity is provided that includes a central shaft, a central gear coupled to the central shaft, and a plurality of roller gears coupled to the central gear, with each of the plurality of roller gears having a central portion. A proximal support member couples the plurality of roller gears and at least one of the central gear and the central shaft. A plurality of rollers is also provided, each of the plurality of rollers connected to the central portion of each of the plurality of roller gears. In one form, at least one idler member is disposed between the plurality of rollers. A distal support member couples the plurality of rollers and at least one of the central gear and a translation member. Also, a stationary member is secured to a distal portion of the vessel cavity.

The present disclosure relates to a method for making a grinding wheel with abrasive surfaces located on an outer diameter of the grinding wheel to provide grinding characteristics of both coarse and fine abrasive textures. The method includes forming on the grinding wheel a coarse abrasive portion located proximate to a first axial end of the outer diameter, a fine abrasive portion located proximate to a second axial end of the outer diameter and a transition band formed at an interface between the abrasive surfaces. The transition band has an abrasive coating with a gradual change in texture from a coarse surface to a fine surface.

The present disclosure relates to a method for making a grinding wheel with abrasive surfaces located on an outer diameter of the grinding wheel to provide grinding characteristics of both coarse and fine abrasive textures. The method includes forming on the grinding wheel a coarse abrasive portion located proximate to a first axial end of the outer diameter, a fine abrasive portion located proximate to a second axial end of the outer diameter and a transition band formed at an interface between the abrasive surfaces. The transition band has an abrasive coating with a gradual change in texture from a coarse surface to a fine surface.

An abrasive article can include a body including a plurality of portions including a first abrasive portion and a second abrasive portion. The first abrasive portion can include a vitreous bond material and abrasive particles contained within the bond material. The second abrasive particles can include an organic bond material and abrasive particles contained within the bond material. The body can have a burst speed of at least 65 m/s. In an embodiment, the abrasive article can include an interior portion coupled to the first and second abrasive portions. In another embodiment, the interior portion can optionally include abrasive particles or a filler material.

An abrasive article can include a body including a plurality of portions including a first abrasive portion and a second abrasive portion. The first abrasive portion can include a vitreous bond material and abrasive particles contained within the bond material. The second abrasive particles can include an organic bond material and abrasive particles contained within the bond material. The body can have a burst speed of at least 65 m/s. In an embodiment, the abrasive article can include an interior portion coupled to the first and second abrasive portions. In another embodiment, the interior portion can optionally include abrasive particles or a filler material.

A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder. The diamond abrasive grains and the CBN abrasive grains have projecting tips acting on a workpiece, the projecting tips having a variation in height of 10 μm or less, the diamond abrasive grains having their projecting tips with irregularities of 0.1 μm or more in height.

A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder. The diamond abrasive grains and the CBN abrasive grains have projecting tips acting on a workpiece, the projecting tips having a variation in height of 10 μm or less, the diamond abrasive grains having their projecting tips with irregularities of 0.1 μm or more in height.