Manufacturing And Production Technology
In ultrasonic machining, the metal is removed by

Using abrasive slurry between the tool and work
Maintaining an electrolyte between the work and tool in a very small gap between the two
Erosion caused by rapidly recurring spark discharges between the tool and work
Direct contact of tool with the work

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

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

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