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

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

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Manufacturing And Production Technology
Side relief angle of a single point tool is the angle

By which the face of the tool is inclined sideways
Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base
By which the face of the tool is inclined towards back
Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of tool

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