For most applications the spark gap for electrical discharge machining falls within the range of :

0.02 to 0.2 mm

0.2 to 0.5 mm

0.5 to 0.8 mm

0.8 to 1.0 mm

For low cost layout

For increasing the rate of production

For better working environment

All of the above

Draw-in collet

Push type collet

Dead-length collet

Master collet with pads

The dead length collet front face

The parting off tool side face towards right of the operator

The parting off tool Side face towards left, of the operator

The Centre of the parting off tool shank

Bar loading

Bar feeding

Coolant circulation

Collet opening and closing