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  1. The point or edge of a diamond or other material set in a drill bit. Also known as cutting point. 2. The edge of a lathe tool in contact with the work during a machining operation.


Related Terms

DIAMOND ORIENTATION

The set of a diamond in a cutting tool so that the crystal face will be in contact with the material being cut.

DIAMONDTOOL

1.Any tool using a diamond-set bit to drill a borehole. 2. A diamond shaped to the contour of a single-pointed cutting tool, used for precision machining.

CLEARANCE ANGLE

The angle between a plane containing the end surface of a cutting tool and a plane passing through the cutting edge in the direction of cutting motion.

CIRCULAR FORM TOOL

A round or disk-shaped tool with the cutting edge on the periphery.

NEGATIVE RAKE

The orientation of a cutting tool whose cutting edge lags the surface of the tooth face.

CUTTER BAR

The bar that supports the cutting tool in a lathe or other machine.

COLD SAW

  1. Any saw for cutting cold metal, as opposed to a hot saw. 2. A disk made of soft steel or iron which rotates at a speed such that a point on its edge has a tangential velocity of about 15,000 feet per minute (75 meters per second), and which grinds metal by friction.

LEAD SCREW

A threaded shaft used to convert rotation to longitudinal motion; in a lathe it moves the tool carriage when cutting threads; in a disk recorder it guides the cutter at a desired rate across the surface of an ungrooved disk.

DRILL SLEEVE

A tapered, hollow steel shaft designed to fit the tapered shank of a cutting tool to adapt it to the drill press spindle.

CLAPPER BOX

A hinged device that permits a reciprocating cutting tool (as in a planer or shaper) to clear the work on the return stroke.

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