The graduated rule, How to choose the ideal and cheapest?

November 2, 2021

The graduated ruler, more commonly known only as a ruler, is a generally thin rectangular-shaped measuring tool that can be rigid, semi-rigid, or quite flexible for different uses. It can be made of metal, plastic or wood, being marked with a graduated length scale.

This instrument has universal applications, being useful in multiple areas, so knowing in more detail everything it offers is not too much.

Features of the graduated ruler

In general, graduated rulers tend to have a maximum height of up to 50 meters depending on the type, being the most commonly manufactured 30 centimeters for everyday use.

In all cases, it usually contains graduation in the decimal metric system with millimeters, centimeters, and decimeters, or in the Anglo-Saxon system of units, which is shown in inches and fractions of inches. Most rules tend to include the metric decimal system on one side and the Anglo-Saxon system of units just on the opposite side.

You can find various presentations of graduated rules, being very varied and different from each other, so they are adapted to multiple uses (in the school, academic, mathematical, financial environment, in carpentry, etc.).

Types of graduated rulers

Among the diversity of graduated rules we can find:

Desk ruler

This is the most common type of graduated rule, having three main purposes and utilities:

  • Simple measurements.
  • Draw straight lines.
  • Guide and mold to make straight cuts with an exact or blade.

The size of these rulers is between 15 and 100 centimeters in general, being easy to transport for everyday use. They are usually made of plastic or wood, with the graduations marked on one side, usually in millimeters, and even half millimeters in other cases.

Folding ruler

Also known as a carpenter’s rule, its design is quite old, so it has several uses. You can find folding rules made of wood mostly, although there are also some of metal, nylon and fiberglass, having steel or aluminum rivets to allow it to be folded and extended.

It reaches sizes of up to two meters, having its measurements printed, engraved, laminated or stamped. They are used most of all in carpentry and various craft workshops .

Measuring tape

This type of graduated ruler is very versatile, being able to be used perfectly on smooth or curved surfaces thanks to its great flexibility. They are usually made of fabric, plastic or rubber, always being one and a half meters their maximum measurement range.

In some cases they have a protective casing , being in the opposite cases, used in the field of dressmaking, sewing and fashion.

Those that have a protective casing are usually very exact, being subdivided into two other types:

  • The flexible meters that are made of corrugated steel and reach 2 meters in length, have a plastic or metal housing and their graduation is in centimeters or millimeters, as well as in inches or fractions of inches.
  • The rigid meters , which have lengths much longer than 10 to 50 meters long, having a tape made of flat steel and a cover of leather, plastic or metal.

Both types have a hook at the end that makes it easy to hold onto the surfaces to be measured, serving as an axis from which to hold.

Workshop rule

Two divisions of this rule can be found in relation to 2 pre-established classes; those of the first class have the beginning of their graduation marks from the first centimeter, while the second class begins at the beginning of the ruler.

The material of this type of rule is steel without tempering , while its lengths are usually between 50 centimeters and 5 meters (being the longest in the folding class). Your graduation marks may be etched or scratched.

Verification rule

Like the shop rulers, these are made of unhardened steel (in a few cases other materials), having their own omission of the first centimeter as class one shop rulers as well.

Its length is usually around 2 meters , going through 10 centimeters, 50 centimeters and 1 meter, as some of its options.

Comparison rule

Likewise, they are usually made of tempered steel or other resistant materials . Its maximum length is 1 meter , having sections with shapes similar to H, U or X.

Both this and the two previous rules are used in metrology workshops or to be mounted on tools and machines, depending on the precision that is required.

Standard rule

They are very similar to the comparison rules, their main function being to carry out the centralized control of graduated rules, especially in those previously mentioned.

That is, as its name indicates, they are used to specify the graduation of rules that are being manufactured, working as the pre-established pattern.

How and why to use the graduated ruler?

To use the graduated rules, three tips should be followed regardless of the case; these are:

  • Appreciation. With this we can understand the minimum measure offered by a measuring instrument according to its graduation. Being a millimeter in the decimal system to exemplify.
  • Estimate. If the measure we take does not coincide with the appreciation reached by the rule, the estimation is carried out. An example of this case would be the measurement of an object whose result remains between 25 and 26 millimeters; the estimate would be to say that the object measures 25.5 millimeters (this is not valid when exact precision is required, requiring in this case a more specific graduation).
  • When measuring any object, the ruler should be placed perpendicular to it, that is, it should not lie down but remain standing; in this way the measurement will be more exact.

A graduated rule is useful in many fields, to name the main ones we find:

  • Middle and basic education.
  • Architecture and engineering.
  • Mechanics.
  • Technical drawing.
  • Carpentry and crafts workshops.
  • Medicine.
  • In the homes.
  • Construction.
  • Industries
  • Plumbing.

The list of uses of the graduated ruler can only be extended, being a tool with great versatility and globalization, thanks to its great precision, accuracy and adaptability , it is the ideal instrument for whatever may be required.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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