Circular saw is a hand-held power tool for straight-line sawing of wood, plywood, polymers and metal. The principle of its operation is simple: an electric motor rotates the circular saw blade with the help of a shaft . By rotating at high speed, the toothed disc cuts the workpiece. Tools of this type are used for repairs and private construction.
Today we will tell you which circular is better to buy for work at home. To do this, consider the main types, characteristics and functions of circular saws.
1. Varieties of circular saws
1.1 By appointment
- Professional ones are used in large industrial enterprises and in private workshops, where they cut volumetric batches of blanks every day. The main differences between a professional tool are high power and a large disc diameter. Industrial models are capable of making cuts up to 140 millimeters deep.
- Household circular saws for wood are designed to work in the country or in the garage. Their main purpose is sawing sheet materials. Household circulars are designed for a cutting depth of 40-50 millimeters.
Circular saws of these two classes differ in functionality and, as a result, in cost.
1.2 By design type
- A stationary circular saw is a relatively large professional machine. Designed for daily use when processing large volumes of wood, for example, in the manufacture of furniture. Some hand-held circular saws have a fixed installation function.
- The desktop circular is less stationary, therefore it is easier to transport, but not as productive. Tabletop models are installed in a garage or workshop. Suitable for medium volumes of work: for the construction of a garden house or a bath. An example of such a tool is the DW745 DeWalt Table Saw.
- The hand-held circular saw is suitable for cutting small volumes of soft materials: wood, plywood, plastic. It is a relatively light tool, which makes it possible to work where it is needed: the workpiece does not have to be taken to the workshop and back. The manual circular is convenient for cutting sheet materials that cannot be cut on a stationary machine.
Hand-held electric circular saw for wood is the most common and demanded.
1.3 Cordless and corded circular saws
- Cordless circular saws for wood are battery operated. Circulars with batteries are very easy to carry, so they are used for work in inaccessible places, for example, when repairing a roof. If you choose a rechargeable circular, pay attention to the RedVerg RD-CS18V model.
On average, the operating time of such models on a single charge is 30-50 minutes.
- Circular saws are powered by an outlet. Their strong point is maximum power and durability. Weaknesses – connection to the electrical network, the need for extension cords, a relatively large weight.
Network models are often chosen for household use. It makes sense to buy a circular saw with a battery only if you plan to work away from the mains.
1.4 By type of processed material
- Electric circular saws for wood. Designed for cutting boards, plywood, MDF, fiberboard and other wood derivatives. To make you happy with the results of your work, choose a disk that suits your current tasks. The general principle is this: the more teeth there are on the disc, the better the cut will be, but the longer it will take.
- Metal circulars are the most versatile. This tool is suitable for hard materials (sheet metal, metal profiles, pipes), as well as for cutting wood, plastic, plywood. To cut metal with a circular saw, you need a carbide cutting disc made of special steel.
In many ways, a circular saw for metal is superior to a grinder: it is more productive, cuts at an angle, does not heat the metal and makes a cut without burrs.
2. The main characteristics of circular saws
The main parameter of a circular saw is the power of the electric motor. It affects the speed of work, the depth and quality of the cut.
- Tools up to 800 watts– circulars for household use. They are mainly used for cutting sheet materials. Sawing capacity: 40-50 mm.
- 800-1200 watt toolsare also designed for home or small workshop use. They are used in construction for cutting boards and bars. Sawing capacity: 50–65 millimeters.
- Tools over 1200 watts– professional models with a cutting depth of 65–140 millimeters. Not used in everyday life.
We recommend choosing the power of the circular saw with a small margin. This will extend the life of the tool and increase the working speed. However, you don’t need to pay too much money either: for a house, a circular of 1000-1200 watts is enough.
2.2 Rotational speed of the saw blade
The cutting speed depends on the number of revolutions per minute. Each material needs its own speed. For example, wood is processed at high speeds, but only low speeds are suitable for plastic, otherwise the edges of the cut will heat up and melt. If you intend to work with other than wood, choose a circular saw with speed control.
2.3 Types of saw blades
Circular saw blades differ in the number, frequency and shape of teeth. If you plan to cut materials of different classes, you need to purchase your own disc for each of them.
2.4 Shape and location of handles
Affects the comfort of the circular saw. Obviously, each craftsman has his own requirements for the instrument. However, most choose models with a mushroom handle, which is convenient to hold in any position, for example, like the Makita HS6601 electric circular saw.
Choose circulars with rubberized grips: this helps to hold the tool firmly during work.
3. Additional functions of circular saws
Power tool manufacturers equip circular saws for wood with additional functionality. These are useful, but not required additions. Check out the possible features to decide if you need to pay for them.
- Soft start– designed for a gradual increase in speed. This eliminates kickback, jerking, sharp cutting of the disc into the workpiece, increasing the quality of the cut and extending the life of the motor.
- Collecting sawdust– on the body of some saws there is a branch pipe for attaching a vacuum cleaner or dust bag. The room you work in will be cleaner.
- Laser mark– the laser beam illuminates the path along which the cut is made on the workpiece. As a result, the cutting line is as flat, precise and accurate as possible.
- Start lock- to turn on the circular saw, you need to press two buttons simultaneously. The operator is protected against accidental disc start.
- Electrodynamic brake- when the trigger is released, instantly stops the rotation of the circular saw shaft and blade. Prevents damage to the workpiece and reduces the chance of injury.
Which hand-held circular saw is better suited for solving everyday tasks at home and in the country? Let’s summarize.
Any tool is selected based on the tasks that you plan to solve for them. Therefore, immediately filter out only household models and do not pay extra money for professional ones.
- Choose a circular saw with a cutting depth of no more than 50 millimeters.
- Determine if you need a hand or table saw. Sometimes it makes sense to take both: one for carrying, the other for the garage.
- If you do not plan to work away from the mains, buy the network model, otherwise – rechargeable.
- If you will be working not only with wood, choose a universal circular saw with replaceable blades.
- Don’t spend too much on an instrument that’s too powerful – 1200 watts is enough for home use.
- Define a set of additional functions.