How to choose a circular saw blade? Where and how can I sharpen the disk for a circular saw?

Disk saw is a universal tool that can work with 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 competently selected disc for the circular saw is required. Note that there is no universal disk suitable for all materials, as each product solves its problems. In addition, it is not worth saving, buying products of an unknown brand - this is primarily unsafe.

Types of saw blades

All saw blades are divided into two types:

1. Monolithic are created from solid metal and differ sharply sharpened teeth. They are popular due to the affordable price, the possibility of recovery, that is, re-sharpening. On the other hand, monolithic products wear out more quickly.
2. Carbide-tipped disks for manual circular saws are more reliable and durable, as they are equipped with sharp taps of cobalt or tungsten carbide on the teeth . Due to the use of carbide materials, products are more durable and reliable, however, if the discs become dull, it will not be easy to restore them.

The shape of the teeth matters!

Choosing a disk for the saw, it is worth paying attention to the design features of the products, the location of the teeth, their shape:

• Straight identical teeth are suitable for cutting chipboard, wood, plywood or aluminum;
• Alternating alternating teeth can cope with cutting wood of soft and hard texture or plywood, as well as with transverse cutting;
• A circular saw blade with trapezoidal teeth can be used when working with chipboard, soft non-ferrous metals, plastic. Due to the special shape of the teeth, the material is not split, and the sawing itself is carried out in two stages - first a rough cut is made, then the edges are trimmed;
• The teeth can have a positive or negative bias: the first is needed when cutting blanks with thick, the second - with thin walls;
• Rare teeth with deep depressions between them provide a good longitudinal cut of the wood, while sawdust is easily removed;
• Small, closely spaced teeth allow for cross cutting of materials. The most convenient among these species is a circular saw blade, each tooth of which has a special ledge behind it. Due to this design, the cut is performed quickly and evenly.

Before you choose a particular disc, you need to solve for yourself a few questions.

Are the technical data?

Each saw blade is selected for a specific type of circular saw. Therefore, when choosing, it is worth considering the power of its engine, the speed of rotation of the spindle, and the diameter of the landing pin. A disc for a circular saw with a large number of rotations and teeth with a negative angle of inclination will exert a heavy load on the motor. So it's worth to find out what the possibilities of your saw are. It is worth remembering that each saw has a landing diameter, so the disk should also fit its dimensions. The choice of the saw blade involves attention to such information as the disk series, its design and external dimension, the diameter of the landing hole.

How will you cut?

The saw blade for the circular saw should be selected with regard to the type of cut - it can be transverse or longitudinal. In addition, an important role is played by the materials that you plan to saw - wood, plastic, particle board, non-ferrous metals, pipes ... Let's note one thing - each series of disks is designed specifically for certain types of work.

The quality of the blade of the disc directly affects the efficiency of sawing. A good blade is created by laser cutting, with balancing done on the computer. Each disc is grinded separately. Quality linen in the light will reflect the marks from the grinding tool. If the canvas is rough and looks rough, this saw blade for the circular saw will not provide efficient work and will be blunted more quickly.

Take into account the diameter

Each saw has its own dimensions, and therefore the snap for it must be chosen with this parameter. The diameter of the discs is important, since if the diameters are different, this will lead to losses. Thus, the depth of sawing depends on the outer diameter. Experts say that the depth of cutting above the workpiece should be minimal: in this case, the propyl will be better, the heating will decrease, and the load on the engine will be minimal. It is important that the disc is firmly fixed on the landing pin.

Count the teeth

Among the most popular tools in the arsenal of a home master is a circular saw. A metal disc for it should be selected taking into account the number of teeth on which the speed and cleanliness of the cutting depends. If there are a lot of teeth, the saw cut will also be clean, however, the load on the engine will increase, and the chips will be harder to bear. With a small number of teeth, the cut is rough and rough, but the chips are easily removed, and the sawing is performed more quickly. A large number of teeth is 80-90, small - 10-40.

How to sharpen?

Like any other tool, the saw needs timely care. The most crucial moment is the sharpening of circular saw blades. Specialists note that the carbide tooth wears out on the main top except, and if massive blanks are sawed, then the side faces quickly wear out. Excessive blunting of the saw should not be allowed, since it will be less productive, and not the fact that it will be possible to sharpen the discs.

Proper sharpening involves simultaneous provision of proper sharpness of the cutting edge. If you sharpen them along one front plane, the number of sharpenings will be less. Many owners of such tools are interested in how to sharpen a circular saw blade. And it depends on the material of the teeth. Sharpening is most often performed on a circle of elbor or green carbide or diamond- based circles. Elborovye circles are expedient for use when sharpening saws from high-speed steel, and diamond - for tools from hard alloys. To sharpen the grind quickly, but less impact on the degree of wear, it is worth choosing diamond circles with the greatest granularity.

For grinding, you can also use machines that have different functionality. The most complex and expensive models are ways to provide automated grinding. When sharpening, the teeth should be planted: if this is not done correctly, a smell of burning, a foreign noise will appear during the cutting, and the material itself will move with jerks, which is not very convenient.

In general, the condition of the disks should be monitored constantly, since their wear will affect the increased load on the mechanisms and sooner or later lead to its complete failure. Thanks to the regular sharpening, it is possible to extend the life of the equipment, improve productivity and shorten the time for the cutting process itself. If after sharpening the cut remains inaccurate, and the material moves unevenly, then more attention should be paid to the arrangement of the teeth.

conclusions

How to choose saw blades? This is easy if you follow several rules:

1. Find the diameter of the hole and the outer diameter of the disc on the label - they must meet the requirements of your saw's characteristics.
2. Pay attention to the thickness of the disc: thin provide good and clean cuts and are used when working with valuable wood species, and thick ones are advisable to use for rough cutting of materials.
3. The disk should indicate the maximum permissible speed. A small speed will allow us to develop a high cutting speed, but will lead to deformation of the disc and a poor-quality saw.
4. Evaluate the quality of the blade blade: if it is good, then the cutting plane will be smooth, without any roughness or flaws.

And most importantly - watch for safety and choose saw blades, which are designed for a specific type of saw. And think about where to sharpen the circular saw blade, if you can not do it on your own.