Saw circular (crown) on wood, concrete, metal: dimensions, sharpening

Ring, or crown saws represent a rather specific segment of the tool, which is due to technical and operational features. If the classic saws work with a cutting tool that realizes a straight cut, the circular tool performs a circular cut. This, by the way, makes such models similar to traditional drills. In the process of work, a hole is also formed, only a larger diameter and with minimal mechanical impact on the structure of the material. More importantly, the circular saw thanks to the design of the nozzles allows you to cope not only with the cutting of wood blanks, but also with concrete, metal and even stone.

Design features of circular saws

The saw-type complex of the ring type is formed by two basic components. First of all, this equipment, due to which the force is applied, causing the nozzle to rotate. The main functional element is directly cutting blade. This can be a set of crowns for wood of different sizes, and universal linens for a wide range of building materials, providing for the possibility of adjusting the diameter.

An obligatory component connecting the power tool and the saw blade is the holder, or shank. The saw is wound on the holder before the working process, and after it is untwisted with a hexagonal wrench. At the same time, the fixation mechanisms may differ. Hexagonal holders are suitable for use in conventional drills, but more modern designs are integrated into the system via the SDS-plus quick-action chuck. After the work is finished, the circular saw should be released from the cut piece of material that entered the empty niche of the crown. A special spring is used for this operation. The sawing products can be removed manually. This method is carried out through special slots on the sides of the saw blade.

Technical specifications

In the ring system, only one parameter remains constant and unified: it is a height equal to 40 mm. Depending on the design, it allows us to saw through holes with a depth of about 32-37 mm. The main characteristic is the diameter of the crown, which provides a circular saw. Its dimensions are divided into two groups - less than 30 mm and more than 30 mm. In the first group, the minimum value is 14-16 mm. Manufacturers usually stick to one initial value and apply it in all saws. Next, almost the whole range of digital values is covered up to 30 mm.

As for the range over 30 mm, its maximum is 150 mm. At the same time, the step at the beginning of the dimensional corridor averages 2-4 mm, and at its completion - up to 10 mm. There is also a special drill bit, produced in the formats 168 and 210 mm. It is usually used for industrial purposes when equipping drilling machines. The diameter of the hexagonal shank, in turn, varies from 6.4 to 15.4 mm.

Functional provision

Additional functions relate to the power tool that drives the saw blade. Depending on the workflow, cooling and dust extraction options may be required. In work with concrete and metal, the loads are excessively high, so cooling with water becomes a necessity and even a safety measure. For this purpose, drilling rigs are supplied with water tanks and automatically fed to the working head. As an alternative, experienced masters recommend simply stopping the tool at peak times. The system of dust extraction with the possibility of connecting an industrial vacuum cleaner is less often supplied with installations that include a circular saw on a tree, although this solution is theoretically possible. The introduction of a dust collector is more justified by the processing of concrete and stone surfaces, the released particles of which not only pollute the work platform, but also can be dangerous for the operator.

Saw for wood 29588 from Kraftool

German manufacturer Kraftool produces reliable and ergonomic circular saws. The range contains kits for different purposes, but the most popular solution is the set 29588. This saw saws are ring-shaped in wood, which is also used in working with plastics and plasterboard. As noted by users, the cutting part provides an almost perfect edge, which allows further use of blanks for point installation work.

The set includes crowns with diameters from 60 to 74 mm, so the kit will find application in professional construction works. Although the circular saw on wood as such does not require special strengthening of the functional cloth, the developers of Kraftool have made a special hardening of the teeth. And their wiring is made in such a way that sawdust in the process of cutting naturally reclines through the side slits.

Saw for metal BAHCO SANDFLEX

For the processing of metal blanks, we use saws made of special material. In particular, SANDFLEX offers bimetal saws of 21 mm format. Such rigging allows you to perform cutting of non-ferrous and ferrous metals, as well as wood. Thanks to the universal holder, the nozzle can be used with hand drills and machine tools. The depth of drilling in this case reaches 38 mm. Again, the drill bit was made with the expectation of independent removal of chips outside the working area. For this purpose, side holes are provided, but depending on the model of the drill or screwdriver, it is possible to connect a separate lead-out system for processing products. By the way, at the cost of the offer from SANDFLEX is one of the most profitable in the segment - typical nozzles of common formats are available for 300-400 rubles.

Saw for concrete HRS from HYCON

The equipment for working with concrete also has its own characteristics. They are clearly expressed in the design of the saw, marketed by HYCON. It is not just an annular saw, but a hydraulic ring, which can also be used to form holes in reinforced concrete, brick and stone slabs. Such high technical and operational capabilities are due to the fact that diamond nozzles are used in the nozzles. According to its characteristics, this saw belongs to a special segment even within the scope of the industrial sector. Suffice it to say that only a specially trained brigade can use the rigging. To ensure safety, the ring saw in the modification of HRS is supplemented by automatic shutdown. This function is triggered during jamming in a solid state niche, which also happens when using similar units.

Rules of operation

First of all, the user must select the appropriate power base for using the rigging. As already mentioned, it can be a drill, a perforator, and even a machine. Further, the optimal sawing mode and diameter are selected, if it is possible to adjust it. The hole must be made without excessive pressure. It is important to feel the cutting pace set by the equipment engine. Otherwise, the circular saw can deform or even lead to malfunctions in the technical stuffing of the tool. After completion of the work, remove the treatment product from the crown niche, then check the integrity of the saw teeth and the condition of the power tool.

How to sharpen a circular saw on wood?

Due to the design features of the sharpening of such saws is difficult to perform at home without special equipment. If you have the necessary experience, you can use the traditional method of manual grooving. For this, it is necessary to securely fix the rigging and, in accordance with the requirements for the condition of the teeth, with a file or other hard abrasive, to refine their geometry. If a standard set of metal crowns is used, then this operation will not cause any special problems. However, bimetallic and diamond crowns for solid materials are machined only in factory lines or at specially equipped construction sites.

Conclusion

Circular type saws have many variations and structural designs. In the choice of a fundamental criterion is the structure and material of the fabric fabrication. In particular, the set of circular saws for wood is characterized by the possibility of adjustment and flexibility. Kits for working with metal blanks and concrete structures are more like crowns for perforators. The next step of choice will be a specific size. It is important to consider that the final diameter of the hole can be several millimeters larger than planned, so in some cases, when performing a spot treatment, you should initially select nozzles with a smaller size in relation to the expected one. In terms of the quality of the material, there may also be different nuances of choice, but in this part it is worthwhile to rely on the possibility of destroying the structure of the target framework. For wood and plastic, there will be enough standard metal canvases, and concrete structures can only succumb to diamond solid-state elements.