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2. Reamer - Wikipedia

   en.wikipedia.org/wiki/Reamer

   A reamer is a type of rotary cutting tool used in metalworking.Precision reamers are designed to enlarge the size of a previously formed hole by a small amount but with a high degree of accuracy to leave smooth sides.

3. Bead roller - Wikipedia

   en.wikipedia.org/wiki/Bead_roller

   A bead roller is a machine tool that makes rigid lines in sheet metal to make surfaces more rugged and durable. The lines bead rollers add to sheet metal prevent warping and disfigurement by adding structural integrity to the metal.

4. Boring (manufacturing) - Wikipedia

   en.wikipedia.org/wiki/Boring_(manufacturing)

   A part's-eye view of a boring bar. Hole types: Blind hole (left), through hole (middle), interrupted hole (right). In machining, boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a gun barrel or an engine cylinder.

5. Hole opener - Wikipedia

   en.wikipedia.org/wiki/Hole_opener

   Heavy-duty roller cones hole opener used for offshore drilling. A hole opener is a device used to enlarge the borehole during a well drilling operation. It can be positioned either above the drill bit or above a pilot run inside the existing borehole. Usages range from hydrocarbon drilling operations to water drilling or horizontal drilling.

6. Jig borer - Wikipedia

   en.wikipedia.org/wiki/Jig_borer

   The revolutionary underlying principle was that advances in machine tool control that expedited the making of jigs were fundamentally a way to expedite the cutting process itself, for which the jig was just a means to an end. Thus, the jig borer's development helped advance machine tool technology toward later NC and CNC development. The jig ...

7. Machine tool - Wikipedia

   en.wikipedia.org/wiki/Machine_tool

   The Moore family firm, the Moore Special Tool Company, independently invented the jig borer (contemporaneously with its Swiss invention), and Moore's monograph is a seminal classic of the principles of machine tool design and construction that yield the highest possible accuracy and precision in machine tools (second only to that of ...