enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   Twist drill bits are available in standard lengths, referred to as Stub-length or Screw-Machine-length (short), the extremely common Jobber-length (medium), and Taper-length or Long-Series (long). Most drill bits for consumer use have straight shanks. For heavy duty drilling in industry, bits with tapered shanks are sometimes used. Other types ...

3. Drill bit shank - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_shank

   The whole of the drill bit, shaft and shank, is usually of the same diameter. It is held usually in a three-jaw drill chuck. Bits of diameter too small to grip firmly can have straight shanks of larger diameter than the drill, which can be held firmly in a standard size collet or chuck. Large drill bits can have straight shanks narrower than ...

4. List of components of oil drilling rigs - Wikipedia

   en.wikipedia.org/wiki/List_of_components_of_oil...

   Drill bit (#26) is a device attached to the end of the drill string that breaks apart the rock being drilled. It contains jets through which the drilling fluid exits. Drill floor (#21) is the area on the rig where the tools are located to make the connections of the drill pipe, bottom hole assembly, tools and bit. It is considered the main area ...

5. Well drilling - Wikipedia

   en.wikipedia.org/wiki/Well_drilling

   PDC (Polycrystalline Diamond Cutter) Drill Bit Early rotary drill bits. The earliest wells were water wells, shallow pits dug by hand in regions where the water table approached the surface, usually with masonry or wooden walls lining the interior to prevent collapse. Modern drilling techniques utilize long drill shafts, producing holes much ...

6. Collet - Wikipedia

   en.wikipedia.org/wiki/Collet

   In the U.S. it is generally for 0.25 or 0.5 inches (6.4 or 12.7 mm) bits, while in Europe bits are most commonly 6, 8 or 12 mm (0.24, 0.31 or 0.47 in). The collet nut is hexagonal on the outside so it can be tightened or loosened with a standard wrench , and has threads on the inside so it can be screwed onto the motor arbor .

7. Drilling - Wikipedia

   en.wikipedia.org/wiki/Drilling

   Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute.