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2. 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 ...

3. Rotary tool - Wikipedia

   en.wikipedia.org/wiki/Rotary_tool

   Die grinders are often used for engraving, cylinder head porting, and general shaping of a part. [1] Die grinders typically rotate at a high speed, typically 25,000 rpm. This is much faster than most cutting tools. As such, one must use accessories rated for such a high rpm to avoid the tool shattering.

4. Spindle (tool) - Wikipedia

   en.wikipedia.org/wiki/Spindle_(tool)

   A machine tool may have several spindles, such as the headstock and tailstock spindles on a bench lathe. The main spindle is usually the biggest one. References to "the spindle" without further qualification imply the main spindle. Some machine tools that specialize in high-volume mass production have a group of 4, 6, or even more main spindles.

5. Jig grinder - Wikipedia

   en.wikipedia.org/wiki/Jig_grinder

   The machine operates by a high-speed air spindle rotating a grinding bit. The air spindles are removable and interchangeable to achieve varying surface speeds. Some spindles are fixed speed (such as at 60,000 rpm), others are adjustable (such as from 30,000 to 50,000 rpm), and still others are very high speed (such as at 175,000 rpm).

6. Router (woodworking) - Wikipedia

   en.wikipedia.org/wiki/Router_(woodworking)

   A tool similar to a router, but designed to hold smaller cutting bits—thereby making it easier to handle for small jobs—is a laminate trimmer. A related tool, called a spindle moulder (UK) or shaper (North America), is used to hold larger cutter heads and can be used for deeper or larger-diameter cuts. Another related machine is the pin ...

7. Burr (cutter) - Wikipedia

   en.wikipedia.org/wiki/Burr_(cutter)

   To achieve optimal surface speed and cutting conditions, burrs are rapidly rotated at high speeds, often in the range of thousands or tens of thousands of RPM, which is typically the maximum speed supported by a given spindle. The cutters depicted in the image, being made of tungsten carbide, can withstand and operate at these elevated speeds.