Circular Saws: Types & Working Principle
Basics
Circular saw is a mechanized tool that uses a single-phase series excitation motor as the power, and then drives the circular saw blade through a transmission mechanism to perform continuous and uniform rotation motion for sawing operations. Circular saws are suitable for sawing wood, fiberboard, plastic, flexible cables, and similar materials. The circular saw adopts a portable appearance structure, mainly composed of a motor, gearbox, protective cover, adjustment mechanism and base plate, handle, switch, non-reconnectable plug, circular saw blade, etc.
Working Principle
Circular saw is generally powered by a single-phase series-excited motor, reduction gearbox (also known as the upper shroud head shell) consists of a pair of cylindrical helical gears. Motor through the helical gear speed drive circular saw blade, adjusting mechanism consists of a depth ruler, angle ruler, the bottom plate, it can be adjusted to the depth of sawing and saw blade tilt, angle ruler below the guide ruler is to ensure that the distance between the seam and the edge of the material is parallel. Shield (head shell) consists of upper and lower cover, the upper shield shell connected to the casing, the lower shield (movable cover) can be rotated along the saw blade, and rely on the tension spring tension or coiled spring pressure to automatically cover the saw blade. When the circular saw is not working, the lower shroud (movable cover) is in the closed position, when working, the lower shroud (movable cover) will be automatically turned up.
Classification of Circular Saws
According to the different ways of power supply, circular saws can be divided into corded circular saws and cordless circular saws.
Corded circular saws are powered by the grid and usually need to be plugged into an electrical outlet in order to be used. Because they are connected to an electrical outlet, corded circular saws usually have a steady, continuous supply of power, and therefore can continue to work efficiently in most situations. Corded circular saws are suitable for working with larger or harder materials, such as hardwood or metal. However, the corded design of corded circular saws can sometimes limit flexibility, especially when working outdoors or when mobility is required.
Cordless circular saws are powered by rechargeable batteries and do not need to be connected to an electrical outlet. By eliminating the need for an electrical outlet, cordless circular saws are very portable and are suitable for outdoor work or situations where they need to be moved from one location to another. Accordingly, cordless circular saws may have lower power compared to corded circular saws, so they may not be suitable for working with larger or tougher materials.
The choice of a corded or cordless circular saw depends on the specific job requirements and work environment. If high power and continuous use time is needed and access to an electrical outlet is available, a corded circular saw may be a better choice. If portability and the flexibility to work in different locations is needed, a corded circular saw may be more suitable. Whichever type you choose, you will need to be aware of battery life and power limitations and take steps when needed, such as spare batteries or more charging time.
The Use of Circular Saws
- Circular saw is used for cutting and processing of metal, wood and other materials, it can be used for metal plates, profiles, composites and plastics cutting;
- It can also be used to cut concrete, used in subways, highways, factories, water conservancy and other construction projects such as excavation and drainage, crack treatment;
- Circular saw is also used for stone craft, workers can use it to cut marble, granite and other materials;
- The circular saw is used for pressure vessels, pipelines and other openings processing, such as boiler tubes and other processing when cutting openings;
- The circular saw is also applied to automobile, machinery, agriculture and other machinery manufacturing industry parts production and repair.
Advantages of Circular Saws
- Safe and reliable
- Reasonable structure
- Lightweight and compact
- High working efficiency
Overall, a circular saw is a very useful power tool that can be used to cut a variety of materials and is very easy to use. However, when using a circular saw, users need to pay attention to safety and need to consider some of its limitations. Only in this way can we better utilize the circular saw and use it in practical work.
