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2. 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.

3. Speeds and feeds - Wikipedia

   en.wikipedia.org/wiki/Speeds_and_feeds

   e.g. for a cutting speed of 100 ft/min (a plain HSS steel cutter on mild steel) and diameter of 10 inches (the cutter or the work piece) R P M = C u t t i n g S p e e d × 12 π × D i a m e t e r = 12 × 100 f t / m i n 3 × 10 i n c h e s = 40 r e v s / m i n {\displaystyle RPM={CuttingSpeed\times 12 \over \pi \times Diameter}={12\times 100ft ...

4. CNC router - Wikipedia

   en.wikipedia.org/wiki/CNC_router

   On some controllers the G-code can be loaded as a vector file on the router control panel. A vector file can be created from a picture file by using a drawing (CAD) software. The human operator selects the machine tool (such as a 1 ⁄ 4-inch (6-MM) v-bit or a 3 ⁄ 4-inch core box bit), speed, cut depth and tool path. For cut path, most ...

5. Router (woodworking) - Wikipedia

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

   Two typical router bits: (top) a 1 ⁄ 4-inch shaft Roman Ogee with bearing, (bottom) 1 ⁄ 4-inch shaft dovetail bit. Router bits come in a large variety of designs to create either decorative effects or joinery aids. Generally, they are classified as either high-speed steel (HSS) or carbide-tipped, however some recent innovations such as ...

6. High-speed steel - Wikipedia

   en.wikipedia.org/wiki/High-speed_steel

   High-speed steel (HSS or HS) is a subset of tool steels, commonly used as cutting tool material. It is superior to high-carbon steel tools in that it can withstand higher temperatures without losing its temper (hardness). This property allows HSS to cut faster than high carbon steel, hence the name high-speed steel.

7. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   The correct tool to start a traditionally drilled hole (a hole drilled by a high-speed steel (HSS) twist drill bit) is a spotting drill bit (or a spot drill bit, as they are referenced in the U.S.). The included angle of the spotting drill bit should be the same as, or greater than, the conventional drill bit so that the drill bit will then ...