The Circular Saw: Everything You Need To Know

With the circular saw, you will have a sawing machine that has a jagged circular blade. It can be hand held or mounted on a table and it can run off of a batter, a small fuel engine or electricity, which is more common.

Circular saws are often preferred because they can make a variety of cuts (straight, angular, cross and circular) and are easy to handle by virtue of their structural design. The basic design for a circular saw is housing for the motor, a handle for maneuvering the saw and a trigger switch which is used to operate the saw.

The main differences that you will find in this type of sawing machine is the types of blades that are used and the torque. The torque and the blade type are co-dependent so you always want to make sure that you are keeping that in mind in order to get the desired function you want.

Blades used in circular saws can either be mounted directly onto the motor’s drive shaft or, with the use of worm gears, can be driven by a perpendicularly mounted motor. These sawing machine blades can also vary in terms of their intended use.

There are smaller blades for the circular saw that are used for re-sawing wood while the high speed steel saws and Tungsten Carbide Tipped saws are used for cutting timber. If you want to cut through metal, you are going to need large diameter blades in your circular saw.

Torque is the rotational force exerted by the circular saw blade and is dependent on the diameter of the blade. Double gear drive saws which have two blades (one attached to the motor and the other to the blade shaft), have high speeds but low torque and are used to cut through thin material. Worm gear saws (strong circular saws that can change motion at right angles) and cold saws have slow rotational speeds but high torque enabling them to handle thick cuts.

Generally, when you are using a circular saw, you will need to have the material clamped down with a clamp or a vice. Your material should always be measured and marked in order to be properly cut. On the saw there should be a foot plate. This will allow you to properly line up the sawing machine with the markings you placed on the material.

Keep the circular saw blade about one inch above the material you are cutting when you start. You will hit the trigger switch and then slowly guide the saw along the marks you created. It is extremely important to make sure that the blade has completely stopped moving before you set the saw done after you are finished with your cuts. You can also adjust the bevel on the saw in order to make the best angle cuts possible.

Of course, the work table circular saw is an exception as you will move the material slowly towards the saw instead of moving the saw through the material.

Luis Torres is Owner of CML Machine Tools, a Circular Saw Supplier based in Boksburg, South Africa. To get more information on circular saw equipment, go to Intelligent Circular Saws

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