View source for Scriber

[[File:Scriber.png|300px|right]]
__TOC__


=====Description=====

[http://wiki.dtonline.org/index.php?title=File:Scriber.png '''Scribers'''] are made from a rod of [https://en.wikipedia.org/wiki/Hardened_steel '''Hardened'''] and [https://en.wikipedia.org/wiki/Tempering_%28metallurgy%29 '''Tempered'''] [https://en.wikipedia.org/wiki/Tool_steel '''Tool Steel'''] which has been ground to a fine point at one or both ends. They are used to mark accurate lines - usually when working in metal.


=====Features and Applications=====

Scribers are sharpened to a 30 degree point by holding them '''[[Tangents and Normals|Tangentially]]''' to a '''[[Tool Grinder]]''' and rotating them. This tends to create grinding marks which run along the point and strengthen it rather than weakening it by going across. 
----
<span style="color: green">'''Note:'''
When scribing lines for bending or folding sheet metal ''(or plastics)'' always mark on the surface that will become the inside of the bend. In this way, '''[[Compression|Compressive Forces]]''' will close up the scribed line during bending, whereas if on the outside, '''[[Tension|Tensile Forces]]''' would open it up and may cause the material to tear or fracture.
</span>
----
<span style="color: green">'''Note:'''
To make scribed lines stand out more, bright steel can be coated with [https://en.wikipedia.org/wiki/Marking_blue '''Marking Blue'''] ''(or a felt tipped pen)'' whilst black steel or rusty metal can first be rubbed with chalk.
</span>
----

{{Marking Out Buyers Guide}}



[[Category:Marking and Measuring Tools]]