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The angle that the cutting face of a tool makes with the work surface back of the tool.



Related Terms

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.

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.

BUTTRESS THREAD

A screw thread whose forward face is perpendicular to the screw axis and whose back face is at an angle to the axis, so that the thread is both efficient in transmitting power and strong.

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.

PERCUSSION BIT

A rock-drilling tool with chisellike cutting edges, which when driven by impacts against a rock surface drills a hole by a chipping action.

NEGATIVE RAKE

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

CUTTING EDGE

  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.

ENTERING ANGLE

The angle between the side-cutting edge of a tool and the machined surface of the work; angle is 90 for a tool with 0 side-cutting edge angle effective.

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.

ADZE

Shipwrights tool used to face timber (cut surface to shape).

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