Drill size=Reamed size-(Under size-over size)

Drill size=Reamed size+ (Under size + over size)

Drill size=Reamed size-(Under size +over size)

Drill size=Reamed size-(Under size x over size)

Mild steel

Brass

H. S.S

Cast iron

Stock

Chuck

Sleeve

Socket

Bevel gear hand drill

Pneumatic hand drill

Electric hand drill light duty

Electric hand drill heavy duty

Pillar drilling machine

Radial drilling machine

Column drilling machine

Sensitive bench drilling machine