Question
Download Solution PDFThis punch is used for making witness marks
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Punches are used in order to make certain dimensional features of the layout permanent.
There are two types of punches. They are made up of high carbon steel, hardened and ground.
|
Punch |
Point Angle |
Application |
|
Centre Punch |
90° |
This is used for locating the centre of the holes. The wide punch mark gives a good seating for starting the drill. |
|
Prick Punch |
30° |
It is used for making light punch marks needed to positive dividers |
|
Dot Punch |
60° |
These punches are used to make witness marks on scribed lines. This makes it easier to see accurate marking out lines. |
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