Proper development of an item in the engineering world can be determined from the marking-out and how the operator has used it. Marking-out and measuring is a crucial stage that can never be left behind when developing an item; I am sure any engineer can relate. If a project is wrongly measured and mark out, hence not planned. There is a 95% probability that there will waste materials, and mistakes will occur.
The primary purpose of this article is to prepare for the manufacturing world, to help the list of measuring and marking-out tools and their applications
The followings will help you know how to use measuring and marking-out tools correctly:
- Knowing tools and where it is ideally used
- Reading dimensions from drawings or sketches correctly
- use the right tools for the right job, don’t compromise
- know how to use tools correctly and accurately
- make a review of any measuring and marking-out to ensure its accuracy
Measuring and Marking-out tools
The followings stated below are different types of measuring and marking-out instruments used in the workshop for various operations. It includes:
Pencil: the pencil is one of the most used marking-out tools reason because it can be easily clean. The right way to use it is to sharpen its edge very lightly in order to give thin light lines that won’t engrave the workpiece.
Steel rule: these types of measuring tools are made of steel used in a flat surface to produce a rigid straight line. It can measure at least 300 mm in length. If the measuring tools are not ideally used, the path becomes inaccurate.
Measuring tape: the measuring tape is an instrument that contains a thinning sheet in a rubber case labelled with numbers on it. It can measure at least 5m long, making it applicable on large projects. If care is not taken while using, the flexible sheet becomes twisted and can break.
Marking gauge: the marking indicators are types of marking-out tools that scribe lines parallel to edges so that waste material can be clean off. For instants, in a woodwork project where a small part needs to be cut off, a marking gauge can be used to scribe out the unwanted part that will be chiselled away.
Try square: the try square is used to draw perpendicular lines on a material to mark out on a workpiece. The purpose of try squares is to ensure paths are parallel to each other and helps to draw the line at right-angles to an edge.
Mortise gauge: a mortise gauge is a marking-out tool that enables two lines to be scribe parallel to an edge. It has two sharp spurs that can be adjusted and set to the mortise chisel’s width before marking the workpiece. These marking-out tools are often used in woodworking.
Sliding bevel: the sliding bevel is used to mark out a part, adjusted to create the required angle. A pencil is then used to mark the line on the material.
Engineer’s square: these hand tools are used to draw a perpendicular line on material with a scribe. It is placed on a workpiece surface with the flat edge being firm on the workpiece.
Spring dividers: these hand tools are used to scribe an arc or draw a circle on materials. They have two legs, looking much similar to a compass. One of the legs is firmly placed on the workpiece while the other leg rotates, scribing a circle or arc onto the workpiece.
Scriber: These popular hand tools help to mark a line on a material. It contains a sharp point and acts as a pencil to engrave a fine line on surfaces like metal or plastic, where pens might not correctly work.
Centre punch: the centre punch help to indicate a centre dot for drilling. A hammer is used to drive the point of the centre punch into the metal, leaving a small surface impression.
Odd-leg callipers: the old-leg callipers assist inscribing a parallel mark on metal or plastic. It has two legs with purposes, one with a guiding edge with a foot and the other with a scribe point. The guiding side runs along the edge of the object to be scored while the scribing edge marks a line parallel to the edge.
Inside callipers: these types of marking-out tools look much similar to the odd leg callipers. They are used to measure distances on the inside of materials like tubes.
These callipers also have two legs with guiding feet pointing outwards. The braces are placed inside the material or object to be measured and then extended until the feet make contact with the material.
Outside callipers: the outside callipers aid the measurement of thicknesses and outside diameters of materials. They are placed around a material with the legs tightened so the guiding feet meet the workpiece but can be removed without being adjusted. The span of the legs is then measured against a steel rule to give an accurate reading.
Micrometre: this is used to give a precise measurement of an object. It is a more accurate version of outside callipers and can give an accurate measurement of outside edges of the material.
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Templates: A template is applicable when a number of identical shapes or patterns need to be marked out. A template can be made from any thin material like plywood or aluminium, or object that is easy to draw around.
That is all for this article, “Measuring and marking-out tools.” The tools listed above are mostly used in metalwork and woodworking workshop. I hope you enjoyed the reading, if so, kindly comment and share. Thanks!