Types of Punches
– Punches are used to drive fasteners, make holes, or form indentations on a workpiece.
– Decorative punches can create patterns or images.
– Pin punches are used for driving metal pins and connectors.
– Center punches mark the center of a point and are useful for drilling holes.
– Prick punches are used for marking out and have a sharper angled tip.
Center Punch
– Center punches are used to mark the center of a hole when drilling.
– They prevent the drill from wandering by creating a dimple.
– The tip of a center punch has an angle between 60 and 90 degrees.
– Pilot holes are usually needed for larger holes.
– Automatic center punches operate without the need for a hammer.
Prick Punch
– Prick punches are similar to center punches but used for marking out.
– They have a sharper angled tip for producing a narrower and deeper indentation.
– The indentation can be enlarged with a center punch for drilling.
– The tip of a prick punch is usually 60 degrees.
– Prick punches are also known as dot punches.
Transfer Punch
– Transfer punches are used to precisely transfer the center of an existing hole to another surface.
– They have a specific outer diameter and are non-tapered.
– Transfer punches are often part of an index set.
– They are useful for duplicating hole patterns or setting locations for threaded holes.
– They ensure accurate alignment and positioning of objects.
Drift Punch
– Drift punches aid in aligning bolt or rivet holes.
– They are tapered rods, with the hammer striking the large end of the taper.
– Drift punches are used to align components before inserting fasteners.
– Force should never be applied to the tip of a drift punch.
– They help align components and allow for easy insertion of fasteners. Source: https://en.wikipedia.org/wiki/Center_punch#Center
This article needs additional citations for verification. (April 2010) |
This article uses various versions of English |
A punch is a tool used to indent or create a hole through a hard surface. They usually consist of a hard metal rod with a narrow tip at one end and a broad flat "butt" at the other. When used, the narrower end is pointed against a target surface and the broad end is then struck with a hammer or mallet, causing the blunt force of the blow to be transmitted down the rod body and focused more sharply onto a small area. Typically, woodworkers use a ball-peen hammer to strike a punch.
