CENTER PUNCH

 TYPES OF MARKING PUNCHES 

Punches are used in order to make certain dimensional features of the layout permanent. There are two types of punches. There are centre punch and prick punch.       Centre Punch: the angel of the point is 90degree in a centre punch. The Punch mark made by this is wide and not very deep. This punch is used for locating holes. The wide punch mark gives a good seating for starting the drill.                                                            Prick Punch:the angle of the prick punch is 30 or 60 degree. The 30 degree point punch is used  for marking light punch marks needed to position dividers. The divider leg will  get a proper seating in the punch mark. The 60degree prick punch is used for marking witness mark