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
