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2. Spotface - Wikipedia

   en.wikipedia.org/wiki/Spotface

   The most common application of spotfacing (spot facing) is facing the area around a bolt hole where the bolt's head will sit, which is often done by cutting a shallow counterbore, just deep enough "to clean up"—that is, only enough material is removed to get down past any irregularity and thus make the surface flat. [1]

3. Facing (machining) - Wikipedia

   en.wikipedia.org/wiki/Facing_(machining)

   This process removes the material by rotating the facing tool in the counterclockwise direction as the table feeds the work piece across the cutter. Face milling can be achieved with an end mill, but is often done with a face mill, shell mill or a fly cutter. Face milling can be done in both manual machining and CNC machining. To obtain a ...

4. Counterbore - Wikipedia

   en.wikipedia.org/wiki/Counterbore

   The pilot matters little when running the cutter in a milling setup where rigidity is assured and hole center location is already achieved via X-Y positioning. The uppermost counterbore tools shown in the image are the same device. The smaller top item is an insert, the middle shows another three-fluted counterbore insert, assembled in the holder.

5. Drilling - Wikipedia

   en.wikipedia.org/wiki/Drilling

   The cutting tool can then be moved simultaneously in an axial direction to drill or machine a hole – and/or combined with an arbitrary sidewards motion to machine an opening or cavity. By adjusting the offset, a cutting tool of a specific diameter can be used to drill holes of different diameters as illustrated. This implies that the cutting ...

6. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   homepage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

7. Milling cutter - Wikipedia

   en.wikipedia.org/wiki/Milling_cutter

   Milling cutters are cutting tools typically used in milling machines or machining centres to perform milling operations (and occasionally in other machine tools).They remove material by their movement within the machine (e.g., a ball nose mill) or directly from the cutter's shape (e.g., a form tool such as a hobbing cutter).