Manufacturing And Production Technology
The grooving is an operation of

Embossing a diamond shaped pattern on the surface of a workpiece
Beveling the extreme end of a workpiece
Reducing the diameter of a workpiece over a very narrow surface
Enlarging the end of a hole cylindrically

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Manufacturing And Production Technology
The lip clearance angle is the angle formed by the

Chisel edge and the lip as viewed from the end of a drill
Leading edge of the land with a plane having the axis of the drill
None of the listed here
Flank and a plane at right angles to the drill axis

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