A rotating tool includes a tool body having an axis of rotation and a first recess for receiving an ID chip having a first mass and a first exterior geometry. The tool includes a dummy chip receivable in the first recess and the tool is rotationally balanced with the dummy chip in the first recess, wherein after balancing the dummy chip is removed and the ID chip is insertable in the first recess.

A drill bit includes a shank, a transition portion, and a body portion defining a plurality of axially stacked, progressively sized steps. The steps include a first step and a terminal step coupled to the transition portion. The first step defines two tip flutes each disposed at a tip flute angle. The body portion defines a body flute extending from the first step to the transition portion. The drill bit also includes an indicator band formed on a portion of the body flute and a portion of an outer surface of one of the plurality of steps.

The present invention relates to a method for working of a work piece, comprising the step of a) providing a template (1) with at least one opening (4, 6, 8, . . . 32) to the work piece (2), b) providing a work tool (70) at the opening (4, 6, 8, . . . 32), c) determining a distance (a) between a fixed reference (17, 116) for the tool (70) and a surface (118) of the work piece (2) facing the template (1), d) collecting the determined distance (a) into a memory (126), e) vibrating a rotary cutting tool (68) on the work tool (70) by means of a vibrating means (77); and f) working the work piece (2) based on said collected distance (a). The present invention also relates to a system for working and measuring objects comprising a computer (128) including a computer program (P) for carrying out the method. The present invention also relates to a computer programme (P) and a computer programme product for performing the method steps.

A coated hole cutter including an ink-based colored coating applied only to the external surface of the cylindrical blade body of the hole cutter, but not to the surfaces of a circumferentially-extending cutting edge or to the interior surface of the blade body. The ink-based color coating is an ultraviolet activated ink that cures when the coating is exposed to a specific ultraviolet light intensity and wavelength. At least the surfaces of the cutting edge and the internal surface of the blade body, which do not include the coating, have a steam tempered oxide finish that imparts a color that contrasts with the color imparted by the coating.

A drill bit includes a shank and a body portion defining a plurality of axially stacked, progressively sized steps. The steps include a first step and a terminal step. The first step defines two tip flutes each disposed at a tip flute angle. The body portion defines a body flute extending through the steps. The drill bit also includes an indicator band formed on a portion of the body flute and a portion of an outer surface of one of the plurality of steps.

A drill bit includes a shank extending along a bit axis and a body portion coupled to the shank. The body portion having a distal end and defining a plurality of axially stacked, progressively sized steps. The body portion defining a body flute having a flute surface. The drill bit includes a first indicium formed on the flute surface adjacent a first step of the plurality of steps, the first indicium including a number and an indicator band around the number and a second indicium formed on the flute surface adjacent a second step of the plurality of steps and spaced from the first indicium, the second indicium including a number and an indicator band around the number, wherein the first indicium is spaced from the second indicium by at least one step of the plurality of steps.