The holder for chamfering, reaming, chasing and drilling work with different machine spindle routine diameters for different machine mode, it can be quick change of different tools in seconds. Both tools can be used to clean up a thread, which is called chasing. However, using an ordinary tap or die to clean threads generally removes some material, which results in looser, weaker threads. Because of this, machinists generally clean threads with special taps and dies—called chasers. Reamer Chamfering Drilling are a type of rotary cutting tool used in metalworking precision, reamers are designed to enlarge the size of a previously formed hole by a small amount but with a high degree of accuracy to leave smooth sides. There are also non-precision reamers which are used for more basic enlargement of holes or for removing burrs. The process of enlarging the hole is called reaming. DCP008-19 is adapt cylindrical shank drilling bits with diameter 19 mm, to hold different tools for chamfering, reaming, drilling which make one machine for all.
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