Systems and methods for conduit deburring include rotational bits and/or supporting structure for reducing burrs on conduit or other pipe or tubing, which often result from cutting. Certain devices simultaneously act on an entire circumference of a tubular end opening. Other devices act on only a portion of a circumference of a tubular end opening, but are guided, registered, or oriented for travel along the circumference to cut a chamfer of a predetermined angle along an interior edge thereof.

A cutting tool rotates about a rotation axis, and includes a tip end portion. The tip end portion includes a partially spherical surface that is brought into contact with a workpiece. The surface is provided with a plurality of recesses disposed apart from each other. An opening edge of each of the plurality of recesses constitutes a cutting edge.

The invention relates to a method for machining a toothing that is chamfered on a tooth head front edge, in which a material projection resulting on said tooth head front edge chamfer, caused by chamfer formation on a tooth front edge of the toothing by means of plastic deformation, and/or caused by removing a primary/secondary burr produced on said end face during production of the toothing and, if applicable, formation of the tooth front edge chamfer, is removed in a rotational operation by a machining procedure with a machining tool that has a cutting edge.

A filing and fastener driving bit assembly for deburring the end of a pipe includes a shaft that has a first end and a second end. A first section of the shaft that is positioned adjacent to the first end is hexagonally shaped. The first section is insertable into a chuck of a rotary tool to couple the shaft to the rotary tool. A second section of the shaft that is positioned between the first section and a second end of the shaft is textured. The second section is used to file an edge of a tubular substrate, such as Electrical Metallic Tubing, as the shaft is rotated by the rotary tool. A screwdriver tip that is coupled to the second end of the shaft is insertable into a complementary head of a fastener, positioning a user to utilize the rotary tool to drive the fastener.

A filing and fastener driving bit assembly for deburring the end of a pipe includes a shaft that has a first end and a second end. A first section of the shaft that is positioned adjacent to the first end is hexagonally shaped. The first section is insertable into a chuck of a rotary tool to couple the shaft to the rotary tool. A second section of the shaft that is positioned between the first section and a second end of the shaft is textured. The second section is used to file an edge of a tubular substrate, such as Electrical Metallic Tubing, as the shaft is rotated by the rotary tool. A screwdriver tip that is coupled to the second end of the shaft is insertable into a complementary head of a fastener, positioning a user to utilize the rotary tool to drive the fastener.

The rotatable cutting tool includes a cutting portion extending from the front end and a mounting portion extending from the rear end. The cutting portion includes a front end face surface and a peripheral surface extending from the front end face surface towards the mounting portion. The peripheral surface includes first helical flutes extending from the front end to a first helical flute rear end and second helical flutes extending from a second helical flute front end to a second helical flute rear end. The first helical flutes are helically aligned about the longitudinal axis and form a first helix angle. The second helical flutes are helically aligned about the longitudinal axis and form a second helix angle. The first helix angle decreases in absolute value away from the front end and/or that the second helix angle increases in absolute value away from the front end.

The invention relates to a method for machining a toothing that is chamfered on a tooth head front edge, in which a material projection resulting on said tooth head front edge chamfer, caused by chamfer formation on a tooth front edge of the toothing by means of plastic deformation, and/or caused by removing a primary/secondary burr produced on said end face during production of the toothing and, if applicable, formation of the tooth front edge chamfer, is removed in a rotational operation by a machining procedure with a machining tool that has a cutting edge.

The rotatable cutting tool includes a cutting portion extending from the front end and a mounting portion extending from the rear end. The cutting portion includes a front end face surface and a peripheral surface extending from the front end face surface towards the mounting portion. The peripheral surface includes first helical flutes extending from the front end to a first helical flute rear end and second helical flutes extending from a second helical flute front end to a second helical flute rear end. The first helical flutes are helically aligned about the longitudinal axis and form a first helix angle. The second helical flutes are helically aligned about the longitudinal axis and form a second helix angle. The first helix angle decreases in absolute value away from the front end and/or that the second helix angle increases in absolute value away from the front end.

A guide 2 for a burr cutter 34, the guide 2 comprising: a body portion 4 having first and second guide surfaces 12a, 12b which are spaced from one another to define a slot 14 between the first and second guide surfaces 12a, 12b; a bearing 32a, 32b for rotatably mounting the body portion 4 to a shank 38 of the burr cutter 34 with a cutting head 36 of the burr cutter 34 adjacent the slot 14; wherein the first and second guide surfaces 12a, 12b and the bearing 32a, 32b are positioned relative to one another such that the first and second guide surfaces 12a, 12b are tangential to the cutting head 36 of the burr cutter 34.

The present disclosure relates to a rotary burs with variable pitch. The file is made up of a cutter head (1) and a cutter handle (2). The cutter head is connected with the cutter handle. Multiple groups of cutter teeth are distributed on the cutter head. Each group of cutter teeth can be mixed cutter teeth, and can also be a single cutter tooth. The mixed cutter teeth are respectively a group of cutter teeth composed of a large tooth (3), a medium tooth (4) and a fine tooth (5) sequentially arranged, and can also be a group of mixed cutter teeth formed by combining any two of a large tooth, a medium tooth and a fine tooth.