Combined square, what is it for and how to use it?

Do you know how to use a combined square? What is the professional combination square for? Find out which are the most complete types of combined square and how to choose correctly. In this article today we will talk about the combined square, a very useful tool in various activities of daily life for electricians.

Most people believe that this is a mechanic’s or carpenter’s tool, but contrary to what many imagine, it is possible to use it in various electrical activities, mainly in electrical infrastructure assemblies. In the image below you can see the combined square of the 435 lines, it is manufactured by Starrett and is composed of 4 parts: A scale of 300mm or 30cm, the main square, the centering square, and a degree transferor.

Discover all the parts of the 435 Starrett combined square

Tools for an electrician!

Definitely one of the most interesting things that exist in an electrician’s work environment is the tools ! The more efficient it is, the better the work will be done. The greater the variety of tools, the greater your area of ​​expertise and that is why they are so important.

Combined square: How to use?

In fact, we can say that there are several uses! It can be used as a 90º or 45º square, known as a half square. It can also be used as grass. For those who do not know, the graminho is a tool that traces risks parallel to an edge and as the scale of the combined square is not fixed, you can vary the measurements you want to trace.

This use is very simple, you define the distance that the line will be parallel to the edge of the piece and then lock the square, then just place the pencil on the side of the scale and move it next to the square, as shown in the image below.

See how to use the combined square for graminho!

In the body of this Starrett combined square, you find a tracer that can be used to mark the pieces, which can be very useful in the absence of a pencil or to mark pieces where the pencil would not be efficient for example. This combination of square and ruler can also be used to measure and calibrate depth and height, as shown in the following image.

See how to mark and measure depth with the combined square!

Combined square: How to use the center plotter?

When this part is used together with the scale, you can define the center of the cylindrical parts or even the square parts. To do this, you must touch the piece against the center plotter and using the ruler as a support, you must make a scratch, then rotate the piece and make a second scratch and that’s it, the intersection of the two scratches is the center of the same circle shows the following image.

See how to mark the center of a circle with the combined square!

It is still possible to define the marking of a square on a piece, for that it is enough to touch one of the corners of a rectangular piece on the center tracer and make the diagonal streak, then using the square, mark the cut to be made as shown in the image below.

See how to mark a square with the combined square!

Combined square: How to use the angle protractor?

The use of the angle protractor combined with the scale can be quite interesting! With this combination, it is possible to measure angles and plot angles. See this example below.

See how to draw angles with the combined square!

If you use only the protractor, you can measure and check the angle of parts and pipes, using the level check bubble as shown in this example below.

See how to measure angles with the combined square?

In this video of the WORLD OF ELECTRICAL, it is possible to view in practice, all the examples that we cite in this article. See how simple it is to make measurements and traces and how easy the tool is to use.

For you who still did not know the combined square, it can be very useful in services such as: installation of apparent conduits or cable trays, cutting and assembly of electrical panels, structure assemblies for electrical equipment and other activities. The more accurate the measurement is, the more efficient the device must be and this accuracy you will certainly find in the Starrett combined square!