Scribers

Scribers are used for marking lines on the surfaces of work like a pen/pencil. They are made of high carbon steel and its length is usually 4-12 inches. It has two pointed ends with one end bent at an angle of 90^o.

FIGURE

The following are the points to be noted when using scribers.

• Check the points for sharpness before using a scriber.
• Ensure the straightedge is positioned flat on the metal.
• Hold the scriber like a pencil and slightly tilt it in the direction toward which it will be moved.
• Keep the point close to the guiding edge of the straightedge.
• The scribed line should be visible but not deeper than required.
• As scribers can crack aluminium and its alloys at a scriber mark due to stress, they are not to be used on notch sensitive metals.