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Raybalama

reamer or ream is a tool for enlarging holes and is used in metalworking. It may be used as a hand tool or may have a specialized drive end. For production machine tools the drive will usually be a standard taper. For hand tools the drive will usually be a square drive, intended for use with the same type of wrench used to turn a tap for the cutting of screw threads.A typical reamer consists of a set of parallel straight or helical cutting edges along the length of a cylindrical body. Each cutting edge is ground at a slight angle and with a slight undercut below the cutting edge. Reamers must combine both hardness in the cutting edges, for long life, and toughness, so that the tool does not fail under the normal forces of use. They should only be used to remove small amounts of material. This ensures a long life for the reamer and a superior finish to the hole.#

 
 
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