Mounting The Blade On The Circular Saw
Circular saw blade: choosing the right one
The circular saw blade is a working tool designed for cutting various materials. It is an integral part, without which it is impossible to carry out any operations for processing blanks. Saw blades are used in stationary machines and hand-held cutting tools.
Number of teeth on a disc
Affects parameters such as cutting speed and finish. With a decrease in the number of teeth, the processing speed increases, the conditions for chip evacuation are improved, but the cleanliness of the cut deteriorates. As the number of teeth increases, the cut is cleaner, but the load on the engine increases. Conventionally, according to the quantitative ratio, disks can be divided into three groups:
- A large number of incisors, in the range of 80-90 pieces;
- Average quantity (40-80 pcs.);
- Small amount (10-40 teeth).
Discs with an average number of incisors are referred to as the universal type. They can handle soft and hard wood, make cross and longitudinal cuts, use for processing various wood products.
Tooth tilt
Determined by the deviation from the radius of the disc of the cutting edge surface. With a deviation to the back of the tooth, the slope is called negative, with the reverse side of the slope. positive. For longitudinal sawing, it is more advisable to use a tooth with a positive inclination, since during the processing there is a kind of delight of the material, the collision of the disk on the part, which contributes to a faster cut of the workpiece as a whole. Tooth inclination is divided into:
- Standard tilt. the angle varies from 5 ° to 15 °;
- Positive, aggressive slope is 15-20 °;
- Normal, negative angle ranges from 0 ° to 5 °.
Recommendations for choosing a disk
When choosing a blade, you must 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 are 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 are possible.
The rim of the disc (inner diameter) and the corresponding on the motor shaft Must match, otherwise the tool cannot be mounted on dust.
The outer size of the disc cannot exceed the inner size of the casing. if this parameter is violated, the tool will NOT mount on dust.
Several factors affect the type of disc:
- Type of work carried out, processed material;
- Device, design of the cutting tool;
- Number of teeth, their design.
Work performed and processed material. Since the discs are different, it is necessary to determine 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.
The processing mode and type of material determine the number of teeth, their type and inclination. Most popular medium number of positive trapezoidal teeth.
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. Some disc models have additional holes that secure the disc to pins.
The main parameters of the circular saw blade
Tooth configuration
Each type of cutter is designed and manufactured to solve a specific task. Subdivided:
- Flat blade. used for fast rip sawing in 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.
- Combination 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 under the 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.
- Replaceable cutter with increased sloped side. Designed for cutting materials prone to splitting and for fine cross-cutting. Denoted by HiATB.
Outer (outer) diameter
It is determined by the inner size of the guard. a disc with a large diameter will NOT fit on dust with a smaller guard. The main dimensions of cutting tools 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.
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;
- They are repeatedly re-sharpened, therefore, they have a sufficiently large resource of work.
Disc with teeth, which are reinforced with carbide brazing. 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:
- Allows to cut most of the known materials;
- NOT required to set teeth;
- Strong and reliable in the process of work;
- The service life from sharpening to sharpening is several times higher in comparison with a monolithic disc;
- Give a cleaner cut;
- Increase cutting speed;
- Produced in a wide assortment to solve all kinds of tasks when sawing materials.
At the same time, there is a significant drawback. such discs are expensive and special equipment is required for sharpening.
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;
- They are repeatedly re-sharpened, therefore, they have a sufficiently large resource of work.
Disc with teeth, which are reinforced with carbide brazing. 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:
- Allows to cut most of the known materials;
- NOT required to set teeth;
- Strong and reliable in the process of work;
- The service life from sharpening to sharpening is several times higher in comparison with a monolithic disc;
- Give a cleaner cut;
- Increase cutting speed;
- Produced in a wide assortment to solve all kinds of tasks when sawing materials.
At the same time, there is a significant drawback. such discs are 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 dust with a smaller guard. The main dimensions of cutting tools 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.
Recommendations for choosing a disk
When choosing a blade, you must 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 are 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 are possible.
The rim of the disc (inner diameter) and the corresponding on the motor shaft Must match, otherwise the tool cannot be mounted on dust.
The outer size of the disc cannot exceed the inner size of the casing. if this parameter is violated, the tool will NOT mount on dust.
Several factors affect the type of disc:
- Type of work carried out, processed material;
- Device, design of the cutting tool;
- Number of teeth, their design.
Work performed and processed material. Since the discs are different, it is necessary to determine 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.
The processing mode and type of material determine the number of teeth, their type and inclination. Most popular medium number of positive trapezoidal teeth.
Circular saw blade: choosing the right one
The circular saw blade is a working tool designed for cutting various materials. It is an integral part, without which it is impossible to carry out any operations for processing blanks. Saw blades are used in stationary machines and hand-held cutting tools.
Disc thickness
The standard setting is 3.2 mm. The thinner the disk, the more it heats up and the faster it breaks down. Thickness guarantees long tool life, but slows down work. In this case, material overruns increase due to a wide cut.
Important characteristics
So that readers do NOT get lost in the wilds of the modern market for equipment for circulating dust, we have prepared 5 main criteria that will help you make your choice. Let’s consider them in order of importance.
The main parameters of the circular saw blade. Saw blade types
All saw blades are divided into two types:
- Monoliths are made of hard metal and have sharply sharpened teeth. They are popular due to their affordable price, the possibility of restoration, that is, re-sharpening. On the other hand, solid products wear out faster.
- Tungsten carbide blades for hand-held circular saws are more reliable and durable because they feature cobalt or tungsten carbide sharp points on the teeth. Due to the use of carbide materials, the products are more durable and reliable, however, if the discs become boring, they will not be easy to repair.
External diameter
The outer or outer diameter of the blade should not exceed the dimensions of the circular saw casing, otherwise the Ego will not be able to be installed on the Seat. Increasing the parameter leads to an increase in the cutting depth. The characteristic varies from 65 to 500 mm.