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Marking Out

Marking out is the process of transferring a design or pattern to a workpiece as the first step in manufacturing. It involves using tools to mark dimensions, angles, and reference points on the workpiece based on technical drawings or plans. Common marking out tools include surface plates, angle plates, scribes, height gauges, squares, protractors, punches, and compasses. The specific tools and methods used vary between industries, such as engineering which uses precision tools and welding which relies more on center punches, hammers, and chalk.

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Oladimeji Taiwo
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2K views2 pages

Marking Out

Marking out is the process of transferring a design or pattern to a workpiece as the first step in manufacturing. It involves using tools to mark dimensions, angles, and reference points on the workpiece based on technical drawings or plans. Common marking out tools include surface plates, angle plates, scribes, height gauges, squares, protractors, punches, and compasses. The specific tools and methods used vary between industries, such as engineering which uses precision tools and welding which relies more on center punches, hammers, and chalk.

Uploaded by

Oladimeji Taiwo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOC, PDF, TXT or read online on Scribd
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Marking out

Marking out or layout is the process of transferring a design or pattern to a work-piece,


as the first step in the manufacturing process. It is performed in many industries or
hobbies although in the repetition industries the machine's initial setup is designed to
remove the need to mark out every individual piece.
The actual method is unique for each field of expertise:

Engineering/Machining
In the metal trades area, marking out consists of transferring the dimensions from the
plan to the work-piece in preparation for the next step, machining or manufacture.
Tools that are peculiar to the engineering/machining area are typically

Surface plate or marking out table provides a true surface from which to work

Angle plates assist in holding the work-piece perpendicular to the table

Scriber is the equivalent of a pen or pencil. It literally scratches the metal


surface leaving behind a fine, bright line.

Vernier height gauge or scribing block allows lines to be scribed at a preset


distance, from the tables surface.

Surface gage an ungraduated comparison measuring tool that performs much


the same function as the vernier height gage. It is often used in conjunction with a
dial indicator and a precision height gage.

Marking blue to provide a usable writing surface by covering any existing


scratches and providing a contrasting background.

Protractor to assist in the transfer of angular measurements

Combination square an alternative tool for transferring angular measurements


Square to transfer 90 angles to the workpiece

Punches either prick or center punch to create permanent marks or dimples for
drill bits to start in.

Ball peen hammer used in conjunction with the punches to provide the striking
blow needed.

Dividers or measuring compass for creating circles or arcs.

Automatic center punch a spring loaded punch that creates prick punch marks
without the need for a ball peen hammer

Welding
As welding does not always require the use of fine tolerances, marking out is usually
performed by using centre punches, hammers, tape measures and chalk.
The "chalk" is actually a small pre-cut block of talc (soapstone). These talc blocks can be
sharpened to a stronger point than the softer blackboard chalk. The color of the chalk
provides good contrast against the dark color of the hot rolled steel that is generally used.

Sheet-metal
A sharp scriber along with try squares, rulers, trammels and tape measures are generally
sufficient for this field

Woodworking
In carpentry and joinery practice a pencil is used for marking while in cabinetmaking a
marking knife provides for greater accuracy.

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