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Showing posts with label Marking Tools. Show all posts
Showing posts with label Marking Tools. Show all posts
Engineer’s Scriber




It is a tool used to mark or scribe a guide line onto a workpiece prior to it being machined. The name scriber came from the word scribe, which itself came from the Latin word scriba, which was a person who would write, engrave or inscribe documents. They are Specifically used to mark out metal work pieces due to their advantages over other marking methods on this type of material.


Drawbacks of using a scriber
Drawbacks of scribers over other marking tools are that the lines made by scribers cannot easily be removed, without grinding or polishing. That is why scribers are not always the best tool for marking out an area of the work piece that will also be visible in the finished part.
You also need to take care when using scribers means measurements you have taken should also be correct before you scribe the work piece.
Dot Punch                                                                   Centre Punch



The centre punch is made up mild steel which has a hardened and tempered point so that it withstands impact with the material it is marking. It is usually used to mark the centre of a hole to be drilled either by hand or on the drilling machine.

Dot punch is a lighter and thinner version of the centre punch and is also used for same purpose. However dot produced by dot punch is smaller than centre punch.

Centre and Dot punches both are used in the same way. A ball peen hammer is commonly used to tap the head of the punch and this delivers enough force to the point of the punch to put a small indentation into the surface of the material.