How To Properly Place A Disc On A Circular Saw

Recommendations for choosing a disk

When choosing a blade, it is necessary to take into account the technical parameters of the circular saw:

• engine power;
• maximum number of revolutions;
• fitting size on the motor shaft;
• inner diameter of the guard.

Engine power affects the type of disc. negative angle, a large number of teeth create a large load on the engine, which will have to work in “peak” mode.

The number of revolutions or speed of rotation of the spindle is interrelated with certain dimensions of the disc, which the manufacturer recommends to use. Installation of a cutting tool with deviations from the recommended ones can lead to abnormal operation, as a result of which damage to the blade, saw and damage to the processed material is possible.

The seating dimensions of the blade (inner diameter) and the corresponding one on the motor shaft must match, otherwise the tool cannot be installed on the saw.

The outer size of the blade cannot exceed the inner size of the casing. if this parameter is violated, the tool will not be installed on the saw.

The disc type is influenced by a number of factors:

• type of work carried out, processed material;
• device, design of the cutting tool;
• number of teeth, their design.

Work performed and material to be processed. Since the discs are produced differently, it is necessary to decide on the types of operations (what types of cuts will be carried out), and also take into account what the cutting tool will handle.

Depending on the type of operations and material, the type of disc is selected: monolithic or with carbide taps.

The processing mode and type of material determine the number of teeth, their type and inclination. Most popular medium number of positive trapezoidal teeth.

Disc thickness

Specifies the actual kerf.
The standard size is 3.2 mm. In addition, the thickness of the disc affects the strength of the cutting tool itself. Decreasing the parameter leads to heavy operating conditions, disk overheating and breakdown. A larger size causes an increased consumption of the processed material, that is, “transfer to shavings”.

Circular saws are used in the processing of various materials. Accordingly, the cutting tool is made for specific tasks.

Tooth configuration

Each type of cutter is designed and manufactured to solve a specific task. Subdivided:

• Flat cutter. used for fast rip sawing of soft or hard wood, marked FT.
• Replaceable cutter. has a successively alternating replaceable inclination of the teeth to one side or the other. The cutters give an even and fairly clean cut. It is used for transverse and longitudinal cuts of wood, processing of plywood, OSB, chipboard and composite boards, indicated by the ATB symbol.
• A combined cutter is a sequential change of groups from a combination of four replaceable cutters (ATB) and one flat cutter (FT). Combi. This type of disc is referred to as universal due to the ability to perform different types of cuts.
• Trapezoidal flat cutter. made of successive flat teeth. The higher one is sharpened for a trapezoid, the lower one is flat. It is used for processing wood and wood products, for polymeric materials and soft non-ferrous metals. Has the designation TCG.
• Replacement tool with increased sloped side. Designed for cutting material prone to splitting and for fine cross-cutting. Denoted by HiATB.

Purpose

Depending on the type of disc, the following can be processed:

• wood of various species;
• wood products. chipboard, OSB, plywood, laminated flooring and other similar materials;
• polymeric substances and products from them, for example, organic glass, polystyrene;
• natural stone material such as marble;
• soft metals. aluminum, copper alloys;
• products based on iron alloys. pipes, corrugated sheets, etc.

Black and Decker Circular Saw (13 Amp Corded Model)

The cutting tool has certain characteristics, parameters, dimensions, purpose, properties of the material from which it is made.

Types of circular saw blades

Monolithic disk. They are made of high-quality high-carbon or high-speed steel. They are used for processing wood and wood products, as well as for cutting polymer products. They have a number of advantages:

• inexpensive;
• simple sharpening of teeth. you can perform this operation yourself, without the presence of complex special devices;
• are re-sharpened many times, therefore, have a sufficiently large resource of work.

Disc with carbide-reinforced teeth. The blade is made of durable tool steel. Brazing are steel alloys with high tungsten or cobalt carbides. Thanks to this solution, these discs have become the most common. They have a number of advantages:

• allow cutting most of the known materials;
• no need to set the teeth;
• durable and reliable in the process;
• the service life from sharpening to sharpening is several times higher compared to a monolithic disc;
• give a cleaner cut;
• increase cutting speed;
• are produced in a wide range to solve all kinds of problems when sawing materials.

At the same time, there is a significant drawback. such discs are relatively expensive and special equipment is required for sharpening.

Outer (outer) diameter

It is determined by the inner size of the guard. a disc with a large diameter will not fit on a saw with a smaller guard. The main dimensions of the cutting tool for hand-held circular saws are in the range of 130-250 mm. The outer diameter does not significantly affect the cutting speed, but determines the depth of cut. With an increase in the cut, the engine is significantly loaded, the metal of the disk and the workpiece itself are heated.

Inner bore diameter

It has several sizes: 16, 20, 22, 30, 32. An important parameter is that the diameter must correspond to the size of the power shaft on the saw, for which the blade is matched. On some models of discs there are additional holes that fix the disc on the pins.

Circular saw blade: choosing the right one

The circular saw blade is a tool for cutting various materials. It is an integral part, without which it is impossible to carry out any workpiece processing operations. Saw blades are used in stationary machines and hand-held cutting tools.

Inner bore diameter

It has several sizes: 16, 20, 22, 30, 32. An important parameter is that the diameter must correspond to the size of the power shaft on the saw, for which the blade is selected. On some models of discs there are additional holes that fix the disc on the pins.

Which one is better to choose?

Professional builders and home craftsmen, during the selection of a disc for a circular tool, recommend taking into account the following nuances:

• it is necessary to determine what parameters are inherent in the tool itself. in this case, you need to set the saw power, the maximum permissible number of revolutions, as well as the landing size on the device shaft and the inner diameter of the circle for working with the tool;
• if discs with a negative inclination of the incisors are purchased, then it is worth considering in advance that such elements will assume that the device will work at its maximum capacity;
• the outer diameter of the saw blade cannot be more than the inner diameter, since such a product cannot be fixed in the mechanism;
• in the course of selecting a disc, you must also take into account the amount of proposed work, as well as the type of material being processed; based on the type of work, you can stop at a more expensive carbide or monolithic disc, which can be sharpened as needed;
• what mode of operation is assumed for the tool, you can choose the right configuration and the number of cutters on the element; the most common option is considered to be a disc with an average number of teeth, which will have a trapezoidal sharpening with a positive deviation from the radius;
• the good quality of the disc will be indicated by such external signs as the presence of a laser marking, the product must be clean and polished; it is important that the element goes through the balancing procedure before implementation;
• high-quality products will have several slots, which are necessary for the product’s resistance to temperature changes;
• preference should be given to saw blades from well-known manufacturers who follow their reputation and sell only high-quality and proven products.

Marking

As you can see in the picture, the disc labeling can tell you about many technical characteristics. But there is a dependence that should not be neglected: the shape of the teeth directly affects the ability to work with a specific material.

The classification, developed by representatives of the GASS brand, divides the discs into the following categories according to the shape of the teeth:

GK and GS: alternately cut. Suitable for processing all types of wood and “clean” chipboard, without plywood and plastic coatings.

GM: straight. Only able to cope with cutting soft wood.

GT: trapezoidal. Useful when you need to cut MDF or chipboard with lamination.

GR: tapered. Cuts multi-layer double lamination.

GA: trapezoidal and straight. Same features as GT.

Manufacturers apply laser marking on quality saw blades. If the parameters are “written” with ordinary paint, then we have an economy-class product that will quickly become unusable.

Characteristics

During the selection of parts, a number of fundamental parameters of products should be taken into account.

Disc thickness and soldering options

The thickness of the slice itself directly depends on this parameter. However, products that are too thick can cause overheating. The most common size is 3.2 mm.

Popular manufacturers

The modern market is full of offers from manufacturers. But there are companies that are time-tested. It is their products that are preferred by the owners of circular saws. A short list of popular brands is as follows:

CMT. The company appeared in Italy back in 1962. Production was moved to China, and only the head office remained in Europe.

“Makita”. The company was founded in 1915. Much time has passed since then, but Japanese products are still popular all over the world.

Bosch. This name has long become a symbol of unsurpassed quality. Bosh saw blades are a welcome guest in every home workshop.

“Attack”. The organization appeared in 1998 on the territory of Russia. It can rightfully be called the oldest supplier of consumables in the domestic market.

Metabo. The name comes from the German name for a hand drill. Assembly of the first products started in Germany after 1924.

Dewalt. The victorious march of the company across the planet started in the USA. Since 1922, the brand has been producing accessories for power tools.

Advanced technology isn’t easy to figure out. Tool manufacturers are constantly improving their production. We suggest watching a video that will help you make the right choice and find out a lot of useful information:

How to choose a circular saw? Where and how can you sharpen a circular saw blade?

Circular saw. it is a versatile tool that can handle a wide variety of materials. from wood to plastic and sandwich panels. But in order for the cut to be smooth and without a notch, a well-chosen circular saw blade is required. Please note: the universal disc is not suitable for all materials, as each product solves a different problem. In addition, you should not save money by buying products of an unknown brand. it’s unsafe in the first place.

Inner bore diameter

It has several sizes: 16, 20, 22, 30, 32. An important parameter is that the diameter must correspond to the size of the power shaft on the saw, for which the blade is matched. On some models of discs there are additional holes that fix the disc on the pins.