1.)CENTER REAMER – A countersink having a 60° included angle for sizing and smoothing center holes in workpieces to be turned or ground between centers.
2.)CERAMIC TOOLS – A newer cutting tool material made of aluminium oxide or silicon carbide and held together by binders or additives of other materials.
3.)CHISELS– These are hand working tools, made from carbon tool steel, usually of octagonal section. The end of the chisel is shaped to the required form and finished by grinding.
4.)COUNTERBORE– When a drilled hole is to be enlarged concentrically for a portion of its length, a counterbore is used. It consists of a series of blades arranged to cut on the ends only, and a smooth pilot slightly smaller than the drilled hole.
5.)DIE (drawing) – Tool of angular form through which a shell is pushed, tubes, sections, bar and wire are pulled so as to give the required size and cross-sectional shape.
6.)DOT PUNCH – Light type of sharply pointed centre punch used for light centre dotting along a scribed line to make it more easily visible or to ensure a permanent record of its location.
7.)END MILL – A milling cutter having a straight or tapered shank for mounting into a holder for driving. The cutting portion has teeth on the end as well as on the circumference.
8.)FLAT ENDED DRILL– by means of which a hole previously drilled to the correct depth with a twist drill may be squared out to a flat bottom, the small “pip” is necessary to ensure that the drill runs concentrically.
9.)FLUTED CHUCKING REAMER – A machine reamer which has straight or helical flutes to provide cutting edges over the entire length of the flutes. Intended for removing a small amount of metal and for finishing a hole accurately and smoothly.
10.)HOB – Fluted rotary cutter used to produce spur, helical, and worm gears, a worm shaped cutting tool having a number of flutes or gashes running across the threads so that a series of cutting edges is formed.
THANX
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