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2. Oscillating multi-tool - Wikipedia

   en.wikipedia.org/wiki/Oscillating_multi-tool

   An oscillating multi-tool or oscillating saw is a multitool and power tool that oscillates (rather than rotating or reciprocating), powered by battery or mains. The name "multi-tool" is a reference to the many functions that this tool can perform with the range of attachments available. "Master Tool" is also a trade name used in North America ...

3. Ultrasonic machining - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic_machining

   An ultrasonic drill from 1955. Ultrasonic machining is a subtractive manufacturing process that removes material from the surface of a part through high frequency, low amplitude vibrations of a tool against the material surface in the presence of fine abrasive particles. The tool travels vertically or orthogonal to the surface of the part at ...

4. Dremel - Wikipedia

   en.wikipedia.org/wiki/Dremel

   Variable-speed versions cover a range of 3,000 to 37,000 rpm. The Dremel relies on high speed, rather than the high torque of a conventional power drill. By inserting the appropriate bit (or burr), the tool can perform drilling, grinding, sharpening, cutting, cleaning, polishing, sanding, routing, carving, and engraving. Early cordless models ...

5. Reciprocating saw - Wikipedia

   en.wikipedia.org/wiki/Reciprocating_saw

   Reciprocating saws have many uses; here, one is shown cutting through hard-to-remove nails in a staircase. A reciprocating saw is a type of handheld, small, machine-powered saw, in which the cutting action is achieved through a push-and-pull ("reciprocating") or back-and-forth motion of the blade. The original trade name, Sawzall, is often used ...

6. Grinding (abrasive cutting) - Wikipedia

   en.wikipedia.org/wiki/Grinding_(abrasive_cutting)

   Grinding is a subset of cutting, as grinding is a true metal-cutting process. Each grain of abrasive functions as a microscopic single-point cutting edge (although of high negative rake angle), and shears a tiny chip that is analogous to what would conventionally be called a "cut" chip (turning, milling, drilling, tapping, etc.) [citation needed].

7. Annular cutter - Wikipedia

   en.wikipedia.org/wiki/Annular_cutter

   A tungsten carbide tipped (TCT) and high-speed steel (HSS) annular cutter (also known as a "core drill" or "hole saw"). An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal.