Working with a circular saw

In any construction, repair work, you cannot do without a circular saw. In professional sawmills, woodworking enterprises, you can find this tool. At home, you can use a hand-held circular saw. When working with the tool, you need to be extremely careful, because you are dealing with sharp cutting and fairly high-speed equipment. In this article, I want to give you some important safety tips, since working with a circular saw is very dangerous. However, the user has nothing to fear if he follows the safety standards and rules for the care of circulars and their use.

What is a circular saw

Circular saw – one of the varieties of circular saws. The device is presented in two designs: a stationary machine and a manual circular. In both types, we have two main elements: an electric drive and a cutting flat disc. In stationary machines, the rotation of the disk goes through a belt drive, and in hand-held circular saws, the saw wheel is mounted directly on the shaft of the gear reducer

The material is cut by the fast rotation of the saw blade with sharp teeth on the outer edge. This type of saw was invented at the end of the 18th century. Since the disc was flat and round, the saw was called that – round or circular. The tool has proven to be very efficient and productive in sawmills. Since the teeth of the blade moved continuously and very quickly, it cut workpieces several times faster than other types of saws. As a result, the circular saw became the most popular saw in woodworking, although it required a more powerful drive. Over time, the circular saw has improved, it has an adjustment of the cutting depth, the ability to install a saw blade at an angle to the plane being processed, a parallel stop, a nozzle for a chip suction.

 

What is a circular saw for?

The circular saw is used to cut a variety of hard materials. It perfectly cuts wood and wood-based panels, plastic, laminate, drywall and even soft metals such as aluminum. The tool makes rip and cross cuts efficiently. Since the cutting depth in the circular saw is adjustable, it is possible to make not only through cuts, but also grooves. When using a circular submersible type, you can make a cut not only from the edge of the workpiece, but also in any desired place.

Circular saws are very popular among home craftsmen; they are used in the country, during repairs, during construction work. It is an indispensable tool in carpentry workshops, in the manufacture of wood products (windows, doors, floors), in furniture shops and in woodworking enterprises.

Since direct cuts of various materials are made with a circular, the equipment (cutting disc) is installed taking into account what exactly is cut.

  • Circular saws are classified according to their class – household or professional. Professional circular saws are characterized by increased power and performance. The device is stationary, fixed on a workbench or table and fixed with bolts or clamps. The workpiece is fed to the sawing table. The large diameter saw blade is installed at the bottom. The motor, as a rule, is connected to a three-phase network and is designed for long-term operation and heavy loads.
  • Household circulars are most often hand-held, portable, table-top. Since their engine heats up, it is impossible to work for a long time without interruption. Let the motor cool down. The purpose of the household circular saw is home workshops, where work is performed not continuously, but periodically, from time to time.

Circular saw: device, how it works, what types are there

Working on a circular saw, as well as working with a circular saw, consists in sawing wood, drywall (not recommended), plastic, aluminum products, laminate. This tool allows you to make straight, longitudinal cuts. If the workpieces are small and you need a higher accuracy, it will be most convenient to process them on a table circular saw. If it is necessary to unfold the workpieces along the length or to make rough cuts, a hand circular saw (circular saw) will be your reliable assistant.

There are several types of circular saws:

  • hand saw (circular) ;
  • tabletop ;
  • outdoor ;
  • professional .

 

How to cut with a circular saw? The question, on the one hand, is simple, but in order to understand how to do this correctly, you first need to familiarize yourself with the design of the equipment on which you are going to work.

The principle of operation of any circular saw is similar. The disc, mounted on the shaft with two nuts, always rotates sideways towards the operator. This is done so that the workpiece does not bounce during the cut, the cut is even and you can hold it with your hands without getting injured. In a manual circular, the principle of operation is similar – during the cut, the tool itself is pressed against the surface to be machined.

Motors can be used both brushed and asynchronous. Depending on the type of engine installed, the volume and time of work will depend. Cheaper circular saws have brushed motors. They are good in that, with minor voltage drops, they do not lose speed, making it possible for the tool to work with the performance indicated by the issuing brand. But with prolonged operation, this motor overheats and, if the design does not provide protection, it may fail. The asynchronous motor, on the contrary, can maintain a longer operating mode and is used mainly in semi-professional and professional equipment.

The drive of circular saws is of three types: belt (installed only on large machines), direct (one of the most common types that can be found in any manufacturer) and spur gear (mainly used in hand-held circular saws).

A lot of interesting technical solutions are provided in the design to perform diverse work. Since a table circular saw has a motor under the cutting table, at the angle of inclination and cutting height, special levers regulate the movement of the entire motor together with the disc. The table in this design is an inseparable part of the body. If it is necessary to use long or wide workpieces, in most cases additional tables are provided. For a straight cut along the length or work with small workpieces, cutting at different angles, an additional guide, carriages and corner stops are also provided .

Since this equipment has different technical parameters, dimensions, and, of course, different purposes, you will not always be able to buy one machine and perform all the necessary work on it. But, if you are a pro in your field, then using any type of equipment, you can achieve the desired results.

 

The main parameters that you need to pay attention to are:

  1. Power – this parameter determines how long and how productively the tool will work with different materials;
  2. Disc diameter – provides parameters for the cutting depth – the larger the diameter, the thinner the board you can dissolve;
  3. The ability to adjust the depth of cut from 0 degrees and the angle of inclination up to 45 degrees;
  4. The size of the table, the possibility of its expansion, the presence of a ruler and an angle stop;
  5. Manufacturer – the price of the product, its quality and the class of the device will depend on this.

How to work with a hand-held circular saw

In order not to be injured during operation and to prolong the life of the circular saw, it is necessary to learn how to use the circular saw. Working with a circular saw is not only about cutting wood, processing various materials, but also following safety rules during work. This is a simple, but at the same time very traumatic tool that requires attention. For safe operation and also to prolong the life of the saw, certain rules must be followed.

First, prepare for the work:

  • check the serviceability of the tool before work;
  • it is advisable to use protective equipment, especially for the eyes, in order to avoid the ingress of shavings and all kinds of debris;
  • you can not rest the saw on the workpiece, and then turn it on;
  • always monitor the sharpening of the disc and the presence of all victorious tints on it;
  • do not apply excessive pressure on the tool, this is fraught with overheating;
  • always check the fastening of the disc before work;
  • be sure to clean the tool after work, especially moving structural elements;
  • cut materials only with discs designed for them.

Safety rules when working on a circular machine

Working on a circular machine provides for the following operating rules:

  • the operator working on the machine must stand to the left of the tool;
  • before starting to cut wood, it is necessary to check whether there are any nails, screws, or other unnecessary parts on the workpieces, since contact with these materials can cause the saw to break;
  • if uneven materials are processed, with the presence of pods, when approaching this place, the workpiece must be fed more slowly;
  • To replace the disc, turn off the tool completely and unplug the power cord.

To start working with the unit, you must:

  • arrange the processed material on the saw table;
  • the next stage – the saw blade should not touch the workpiece;
  • after starting the motor, you cannot immediately start trimming the material, first you need to wait until the equipment picks up maximum speed;
  • after finishing work, check the protective cover, it must return to its original position.

When working with a circular saw, it is prohibited to:

  • turn on the circular if the workpiece is in contact with the cutting disc;
  • use a poorly sharpened disc or if it does not have victorious soldering (cutting element);
  • apply excessive pressure on the workpiece, which can lead to a loss of engine speed and further overheating;
  • work with a saw whose blade is poorly and not securely fixed;
  • Leave the instrument dirty and clean it thoroughly after each use.

Each type of material has its own disc, therefore, it is necessary to cut the material only with the disc for which it is intended. Many inexperienced craftsmen, before buying a saw, also wonder what revolutions should be on the circular. The saw will run at different speeds depending on the blade diameter and engine type. For example, a saw with a collector motor and a disc diameter of 254 mm will maintain, on average, 4800-5000 rpm, and a circular saw with an asynchronous motor and a disc of 315 mm will have an operating speed of no more than 2900 rpm.

In this article, I tried to briefly familiarize you with circular saws, their design features and operating rules. I hope this information will be useful to you in the future choice of the tool and will make your work safer.

If you have any questions after reading the article, leave comments below. I will be happy to answer them!

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