Circular saw blade clean cut

Discs in this category have a high cost. They are designed for cutting various metals, steels and alloys. Can have some design features, depending on the hardness of the material to be worked.

Bosch Expert for Steel 2608643060

The cutting elements of the Bosch Expert circular saw blades are made of Microteq special metal with tungsten carbide grit. Not shatterproof and resistant to mechanical stress.

High-tech MTCG teeth with triple design guarantee a long blade life. Anti-vibration holes minimize noise level during operation and increase sawing comfort.

Fitting tool diameter 25.4 millimeters, thickness 2.2 mm. Proteqtion coating to protect surface against excessive friction and corrosion.

• Rugged material with a protective coating;
• reinforced teeth;
• corrosion resistance;
• Reduced vibration at work;
• Long service life.

Bosch Expert for Steel is designed for clean cuts with mitre saws. The reliable choice for professional use.

Keos WMB250.80

Made of quality tool steel, low friction and quick wear parts. A robust welding seam between tooth and casing increases the working life of the disc. Computer-assisted balancing and machine sanding guarantees a smooth cut and safe operation.

Diameter of the saw blade is 250 mm, thickness 2.8 mm. Teeth are alternately trapezoid sharpened for improved performance. Specially designed damping slots provide additional comfort for extended use.

Keos disc WMB250.80 is used for sawing aluminum, copper and other non-ferrous metals. Modern solution for accurate work with soft alloys.

Makita Specialized B-29387

Manufactured in a special alloy with wear protection additives and a reinforcement on the tips of the teeth. This ensures high durability and a long working life of the blade.

Faceplate diameter is 30 millimeters, kerf width is 1.7 mm. Other highlights are the chip-resistant and smooth-cutting shape of the FTG cutting elements.

The Makita Specialized B-29387 is used for quick and clean cutting, e.g. of steel pipes or bars.

CMT 226.048.09M

The cutting elements are made of micrograin tungsten carbide that provides high strength and resistance to quick wear. The disk does not heat up the workpiece while cutting.

Maximum recommended rotation speed is 2800 rpm with a 235 mm wheel diameter. For extra reliability, the disc surfaces undergo a special treatment.

CMT 226 disc.048.09M is used with circular saws for machining steel, cast iron, iron, sheet metal, etc.

Zubr Master 36916-200-30-60

Made of high-quality carbon steel, resistant to heavy loads and friction. BK8 cutters are not subject to deformation, are not afraid of chips and hold a sharp point for a long time.

The rim has a rim diameter of 30 mm and a recommended RPM limit of 7000 rpm. For extra reliability the teeth are automatically ground on three sides. And special compensating slots minimize internal stress.

Zubr Master 36916-200-30-60 is suitable for cutting non-ferrous metals at home.

Tooth shape influence on cutting

Quality of the cut is greatly influenced by the shape of the teeth.

• With flat tip. Wood saw blade with this tooth shape is well suited for cutting hardwood. It tears out the hard fibers, allowing productive sawing movement. Best for ash, oak, beech, birch. Symmetrical tooth, not knurled.
• Flattened. Designed for heavy burrs in the wood. Produce high performance with a dirty cut. Work areas should be sanded with sandpaper additionally.
• Triple chip. This wood saw blade is designed with a specific system that combines the two previous technologies. First comes the knurled tooth, which cuts large areas of wood. The next tooth removes the previous one. This gives a high cutting performance, but the cut is clean and free of protruding fibers.
• Finish. The most common finish disc technology has four teeth with a negative slant and a knurling and one for undercutting. This technology even allows a finish cut. Suitable for cutting particleboard and fiberboard in furniture making.

Important Characteristics

So that readers don’t get lost in the maze of today’s circular sawing equipment market, we have prepared 5 basic criteria that will help to decide on the choice. Consider them in order of importance.

outer diameter

Outer, or outer diameter, of the circular saw blade must not exceed the dimensions of the circular saw blade guard, otherwise it will not fit in the seating. A larger setting results in a greater cutting depth. Characteristic ranges from 65 mm to 500 mm.

Fitting diameter

Seating, or inside diameter. the size of the hole in the center of the tool. Determines whether a circular saw blade can be mounted on the spindle. The most popular sizes are 16, 20, 22, 30 and 32mm. But the full range is much wider, from 11 to 50 mm.

Manufacturers can install pins at the saw’s seating location for additional fixation. In this case, you need to choose a disc with the appropriate holes.

Number of teeth

With more teeth decreases the cutting speed, but improves the cut finish. or vice versa: the fewer teeth. the faster the work, but the more imprecise the cut. The characteristic has its own classification, shown in the table:

№	Name	Number of teeth, pcs
1	Large	80-90
2	Medium	40-80
3	Small	10-40

Tooth inclination

Grinding inclination. deflection angle of the cutting edge of the tooth from the radius of the saw blade. The picture clearly shows how the characteristic can influence the work process. The angles are as follows:

Standard: 5-15°. Universal cutting. Suitable for all types of cuts.

Positive: 15° to 20°. Ideal for longitudinal sawing due to the “gripping” effect.

Negative: 0 to.5°. Used for cross-cutting, no splintering.

Disc thickness

3.2 mm is the standard setting. The thinner the disk, the more it heats up and fails faster. Greater thickness guarantees longer tool life, but slows down the work. In this case the material overrun due to the wide kerf grows.

Tools

It is hard to imagine building work without a circular sawblade. At home, in the cottage or on the homestead can not do without the automatic saw. Productivity increases considerably with proper tooling and use.

The saw blade is an important element of any saw. The right choice of this consumable determines the speed and quality of processing the product, the amount of rejects and waste, as well as the safety of the performer and others.

Is it possible to choose a universal circular saw blade??

Choosing a saw blade is almost a science. Many parameters must be considered at the same time and the characteristics of different models must be compared. If you have no experience, it is better to consult with a specialist. It is not always possible to get the right information from the dealers of circular saw blades. The choice is better left to a professional who has experience in cutting various materials on a circular saw.

Why it is important not to make a wrong choice of blade? Above all, a knowledgeable approach to buying is required for safety reasons. Circular saws are the number one cause of workplace accidents. Such statistics can be changed, if every performer and organizer of construction works would approach the question: How to choose the right saw blade??

Some people try to save on consumables in every possible way and look for universal circular saw blades. But there really aren’t any. It is impossible to find a circular saw blade of the same quality for hard/soft wood, metal or different composites. The disc is selected for the particular application. Of course, it does increase the cost of the job, but it is justified by the increase in speed, quality and safety.

For example, discs with a negative tooth angle are suitable for crosscut saws and provide a clean crosscut. But it is impossible to use them for sawing tables (longitudinal cutting) such discs create the effect of repulsion of the workpiece, contribute to the vibration and resilience of the material. Saw blades, in which the teeth are located at a negative angle, usually have small interdental slots and a large number of teeth. Wood chips quickly clog these cavities, increasing the load on the motor.

Main criteria for disc selection

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

So, what criteria should be paid attention to.

Type of blade. All saw blades are subdivided into two categories: monolithic and carbide.

Solid band saw blades are made of high-carbon or high-speed steel. Cutting tools of this type can be in two configurations:

• The sharp sawtooth tines are suited for cross/longitudinal finishing cuts in soft to hard wood;
• Curved teeth with a wide back are applicable for working with soft wood.

The disadvantages of monolithic discs can include:

Blade can withstand several resharpening cycles. Monolithic specimens usually have many teeth. An additional advantage of discs affordable price.

Carbide-tipped saw blades are considered more reliable. They are made of durable tool steel. Discs reinforced with a solder containing high amounts of cobalt and tungsten carbides. These discs are most in demand because of a number of advantages:

• allow you to cut many construction materials;
• It is not necessary to set the teeth;
• robust and sturdy;
• Working period from sharpening to sharpening is significantly higher than for their monolithic counterparts;
• the result is a cleaner cut;
• high cutting speed;
• there is a wide range of circular saw blades on the construction market for all kinds of applications.

There are two disadvantages:

Outer diameter. This is determined by the inside size of the saw blade guard. A blade with larger dimensions simply will not fit on a saw with a small diameter guard. Using a blade with too small a diameter can have undesirable consequences.

Outer diameter has a direct effect on cutting depth. The cutting speed does not depend on this parameter. For handheld circular saws the dimensions of the cutting tool are about 130-250 mm.

Important! The more the blade plunges into the material, the greater the load on the motor. Optimum tooth protrusion over material to be sawn should be no more than 10-20mm.

Inside diameter of the seat. Important safety prerequisite is a firm hold on the torch. Saw blade must be firmly seated in the dowel pin.

Typical bore dimensions: 16/20/22/30/32 mm. Some disc types have a side-cutting notch in the blade for a better grip.

Number of teeth. All saw blades can be roughly divided into three groups according to the number of teeth:

The choice depends on the task in hand. For a cross-cutting cut, it is best to use a blade with the maximum number of teeth. A longitudinal cut is better performed with a cutter with a small number of teeth (up to 60).

Shape of the teeth. The configuration of the cutters has a significant influence on the quality of the cut. The shape is adapted to the material to be cut. The most popular wood saw blade with variable teeth they are suitable for cutting any kind of wood and are distinguished by an optimal price/quality ratio.

Tooth inclination. This criterion is determined by the deviation of the cutting edge surface from the radius of the saw blade. Negative tilt angle tilts toward the back of the blade. Positive reversal deflection.

Teeth with a positive slope are recommended for longitudinal sawing while cutting material is caught and the blade runs over the workpiece. This speeds up cutting of the workpiece as a whole. Negative tilt slows down the workflow somewhat, but leaves a clean cut. Metal saw blades have teeth with zero inclination.

Thickness of blade. The parameter depends on the mode of operation and determines the width of the kerf. Typical size 3.2 mm.

Thin saw blade is more often used for cutting valuable wood. Standard and thicker saw blade is good for coarse materials. Blades 3.2 mm thick and larger have saw blades for aluminum and laminate.

When evaluating how to choose a saw blade, it should be remembered that thin specimens are economical to use, but less durable and long-lasting. Thicker discs give longer service life but make a less precise cut.

Disc construction. The blade itself can give you valuable information about the quality of the workpiece. A good blade is laser cut, computer balanced and ground separately. Signs of this treatment are visible when you look at the disk in the light. The tool marks diverge in a circular pattern from the inner hole, which means the torch has been ground, balanced and calibrated after cutting the metal.

Tip. If your circular saw blade shows signs of heavy cutting and roughness you might want to discard it. Such a piece will become very hot when in use, and the teeth will become dull quickly.

The saw blade must have temperature compensating slots in the blade. There are grooves at the ends of the slots. These elements reduce saw noise, harmful vibrations, and the heating temperature of the disc itself. The rounded holes at the load point of the initial dynamic pressure of the teeth reduce the risk of the blade breaking.

Blade marking. Manufacturers of quality saw blades mark their products with a laser, not paint. the inscription must not rub off after prolonged use of the saw blade, because the information contained therein can be needed not only for purchase, but also for maintenance.

• the thickness of the cloth;
• Overall diameter/seating diameter of disc;
• number of teeth;
• number of rotations of the blade;
• pictogram of tooth configuration;
• disc series.

Important! The allowable number of blade revolutions must exceed the maximum allowable rpm of the saw spindle.

How the configuration of the teeth affects the quality of the cut

Many variations of tooth shapes are available. All of them are designed to perform a specific task:

• Replaceable tine tips are alternately beveled to the right/left side. The blade provides a clean cut due to the moderate cutting pressure. This option is suitable for cross/ lengthwise cutting of wood, thin panels, fiberboard, plywood, fiberboard, and composites. Disadvantages of replaceable teeth: quick wear under impact loading and difficulty in sharpening.
• Flat trapezoidal teeth alternate high trapezoidal and low flat teeth. Configuration advantages: wear-resistant, open sawdust outlet, balanced cutting forces prevent tooth breakage. Weaknesses: certain difficulties in maintenance. Excellent for cutting solid materials (non-ferrous metal, copper, brass) and wood.
• Concave/rectangular tooth is followed by a triangular shaped cutter. This configuration is common on laminate and abrasive saw blades. Main advantages: Durability and good cut quality.
• Combination saw blade has two concave teeth and one flat tooth. Used in heavy-duty applications for making clean, fast cuts in softwood, hardwood, chipboard. Allows cross and rip cuts without changing disc.
• Flattened and chamfered teeth. The flat teeth have a double angle at the apex. The configuration is designed for longitudinal cutting of construction and formwork wood. Nails and hardened cement are not a problem for the blade.

Wood saw blades: features of the selection

When selecting a wood saw blade additional parameters must be taken into account:

• type of working tool used: angle grinder or circular saw;
• Cutting: lengthwise or crosscut;
• thickness of wood to be processed;
• wood species.

The optimum cutting speed is selected depending on the material:

• 50-90 m/s soft wood;
• 50-80 m/s hard wood;
• 80-85 m/s exotic wood species;
• 60-80 m/s carpentry wood, chipboard;
• 40-60 m/s for laminate panels with one or two-sided coating;
• 30-60 m/s Fibreboard.
• Carbide discs with undercutting blades are used for machines with automatic wood feed.
• Blades with variable teeth of straight shape and a slant of 10 are used on twin-shaft and single-shaft machines, if the humidity in the wood is not more than 15.
• Variable toothed discs with negative inclination suitable for hand tools. This variant guarantees qualitative (cross-cutting) cutting of solid damp or dried wood.

Overview of popular saw blade manufacturers

Domestic and foreign producers offer a wide assortment of saw blades. The following companies are especially in demand: Makita, Bosch, Zubr, Freud, Intertul, Werk, etc.

The Makita Corporation (Japan) has specialized in making power tools and accessories since 1915. The company has branches for production, sales and service in more than 100 countries all over the world. All products are distinguished by durability, accuracy and ease of use.

Makita circular saw blades are available in 13 different categories. The main varieties of discs:

• MFors double beveled tooth, equipped with a clear M-shaped cutting edge;
• MacFors discs designed for different models of hand saws;
• MacBladePlus blades have a special coating to ensure smooth cutting, low friction and effective protection against resin and corrosion;
• Specialized blades for cordless saws;
• discs for wood with nails and knots;
• Metal cutters in particular for stainless steel, aluminum;
• Special discs for circular saws;
• Saw blades for composite materials, sandwich panels;
• discs for laminate.

High-performance and proven quality are represented by the Bosch saw blades. The tools are divided into four groups:

HOW TO MAKE A CLEAN CUT WITH A CIRCULAR SAW

• Optiline Wood is designed for cutting hard/soft wood. The blade is suitable for work with particleboard, fibreboard and woodchipboard. Variable tooth configuration. The disc can be mounted on manual circular, table and circular cut-off saws. Working range 130. 270 mm. over, the Optiline Wood comes in a choice of saw tooth counts (12-60).).
• Multi Material is ideal for minor repairs and interior work. Trapezoidal flat toothing configuration. The Bosch Multi Material saw blades cut through many different materials with clean edges.
• Construct Wood makes rough cuts in construction wood. Flattened and chamfered carbide tines increase the blade’s resistance to foreign objects and ensure an even better grip. Areas of use: shuttering boards, construction wood, chipboard, foam concrete blocks.
• The SpeedLine Wood is suitable for longitudinal and cross cuts in various types of wood. Tooth shape ensures vibration-free, full sawing control.

Russian manufacturer Zubr supplies the domestic and world market with a wide range of quality tools and accessories, including saw blades. Company has developed 8 ranges of disks. There are 4 groups of the Master category and 4 groups of the Expert category.

• Rapid cut. for rough rough roughing and very fast cuts in wood;
• Optimal cut. clean and fast cuts Wood chipboard, fiberboard, glueboard, plywood, hard/soft wood; tooth shape ATV cutters with variable angle;
• Clean cut. provides smooth cuts in wood, glueboard, particleboard and fiberboard faced with plastic, veneer, paper or film;
• Precision multi-cutting. Circular saw blade for laminate, aluminum, plastic and non-ferrous metals; TCG shape with teeth with negative slant.

Zubr saw blades of Expert category have teeth strengthened with carbide-tungsten carbide plates ВК8.

Freud circular saw blades have the following features:

• Blade with a blade hardness of 45° C. (Rockwell scale);
• compensating slots are laser cut;
• the discs are made of a special hard alloy;
• Tri-metal solder technology was used in production;
• presence of tensioning ring;
• saws are dynamically balanced, and runout in axial and radial directions is checked.

General recommendations for the selection of circular saw blades

When buying a circular saw blade, it is essential to consider the characteristics of the circular saw:

the choice of tooth configuration depends on the motor power. Negative tilt and a large number of teeth would put a significant load on the engine and the equipment would have to operate in peak mode, which is highly undesirable.

Spindle speed and RPM are related to the size of the saw blade. When buying, it is necessary to check that these parameters correspond to the requirements specified by the manufacturer of the circular saw blade.

Circular saw blades should not be used on circular saw blades and hand-held circular saw blades. If the level of axial or radial runout of the machine is high enough, you shouldn’t put an expensive disc on it.

What to watch out for when making your selection?

In addition to visual inspection of the disc for irregularities and roughness that increase heat and worsen its balance, you should pay attention to the technical characteristics of the product when choosing one:

• Type of tooling.Monolithic models are inexpensive, but require periodic sharpening and deburring. Carbide discs do not require frequent maintenance, guarantee a decent quality of cut at high RPM and are generally more reliable.
• Outer diameter.The outside diameter of the tool is related to the inside diameter of the shell of the tool that is being used. Also, the bigger the blade, the deeper the cutting depth. For manual saws, 13-25 cm discs are recommended, larger diameter discs are usually designed for stationary machines.
• Number of teeth.Number of cutting elements determined by the specific task. Blades with 80 teeth or more are recommended for cross-cutting cuts. Saws with 60 or fewer cutting elements are used for longitudinal sawing.
• Face diameter.compatibility between disc and tool ensures a snug fit, low runout and improved operator safety. Diameters 16, 20, 22, 30 and 32 mm are typical for circular saw blades.
• Turning speed.The saw blades are available in high or low speed depending on the application. the former are suited for metal, hard and tough wood. The latter are better at working with plastic, soft or tough wood and its derivatives.

Selection criteria for circular saw blades

Circular saws are essential in the woodworking shop. The electric tool makes it much easier to perform various tasks. But it is equally important to choose the right nozzle for it. Let’s find out what kind of disc for longitudinal wood sawing for a circular saw should be in the arsenal of a craftsman.

We present our rating of wood saw blades, compiled on the basis of positive reviews and characteristics, which will help you to choose a proven cutting element that fully meets the forthcoming work tasks.

The selection of products is made on the basis of reviews, opinions and ratings of users, posted on various resources on the Internet. All information taken from public sources. We do not affiliate with any manufacturers or brands, and we do not encourage the purchase of any particular product. The article is for information purposes only.

Fundamental factors in choosing a circular saw blade

As discussed above, three factors influence the cost and performance of a circular saw blade:

• Material. Blade saw blade is made of durable steel. No additional tips are needed for circular saws and roughing. The carbide disc has special tips. Different combinations of metals in the tooth tips allow different types of materials to be machined.
• Dimensions. One of the most important parameters. Disc diameters depend on the machine’s mounting dimensions. Disc thickness depends directly on the material to be sharpened and the quality of cut. Number of teeth on the cutting surface determines cutting speed and surface finish.
• Sharpening. The quality and geometry of the sharpening depends on the quality of the end material that is sawn. Straight cut is used for roughing. Trapezoid sharpening gives a smooth and even cut. The combination of these cuts enables work on soft and laminated materials.

Classification of circular saw blades

Depending on design the tooling is divided into 2 types:

Monolithic. The whole disc is made of tool steel. Its main advantages are low cost, possibility of self-sharpening and maintainability. large safety margin.

Carbide. Base made of tool steel, teeth made of carbide with tungsten carbide filling. Main advantages are high hardness of the cutting edge, clean cut and long sharpening interval.

Carbide-tipped discs allow you to perform woodworking with maximum speed and productivity, but they have a serious disadvantage. you need special tools and above-average skills for maintenance.