Workshop Technology
In blanking operation, the clearance is provided on

Punch
Either on punch or die depending upon designer's choice
Die
Half on the punch and half on the die

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Workshop Technology
Swab is used for

Smoothing and cleaning out depressions in the mould
Moistening the sand around the edge before removing pattern
Reinforcement of sand in the top part of the moulding box
Cleaning the moulding sand

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