Saw blades, or, as they are also called, circular saws, are in demand everywhere where there is woodworking. The assortment of this universal tool is very wide, from huge disks of two and a half meters in diameter to miniature circular saws with a thickness of a third of a millimeter and a diameter of 20 mm. Such a variety is explained by the technological demands of woodworking enterprises, furniture factories, large souvenir shops and small industries focused on the production of small wood products.
For each process, saw blades of a certain type and characteristics are selected in the woodworking. Most of them are unified so that they can be installed on different machines. The main parameters of the saw blade are the outside diameter, the size of the hole and the number of teeth. Sometimes the thickness is important, but as a rule, this size is not indicated in the tool data and is usually 3.5-4 millimeters. It is necessary to specify the outer diameter, since it depends on it, whether the drive is suitable for a particular machine.
Saw blades have the designation of their landing hole. The most common diameter of landing is 30 mm for disks from 200 mm to 400 mm. For disks of smaller diameter, 150-160 mm, the landing size is 20 or 22 millimeters. Standardization of these two sizes avoids many problems when replacing an old circular saw with a new one. The next important feature of the saw blade is the number of teeth, or, as they say, the segments. The more the teeth, the clearer the cut at the sawing.
Usually the number of teeth varies from 40 to 100. Most circular saws for cutting laminated material have 96 of them with a diameter of 300 millimeters. These saw blades work in pair with undercut auxiliary, which make a shallow cutting of the material from below, towards the main saw blade. Both cuts must go strictly along one axis, and the width of the upper and lower cuts must coincide. This rather complicated operation is necessary for the clean cutting of the chipboard laminate so that the cut does not have chips. Good results can only be achieved by an experienced sawmaker with experience in adjusting the position of the saw blades.
Circular saws are solid, solid from solid metal, or the saw blade is made with carbide tacks on each tooth. Advantage of the saw with the soldering in a much longer operating mode. An ordinary steel or iron disk is quickly dull and has to be sharpened constantly, while a tool with tapes does not need sharpening, but only slightly on a sharpening machine. Carbide tines have a strictly defined profile, optimal for the most effective cut. Saw blades on wood usually have sharpening "mirror-wise through the tooth". An array of natural hardwood wood requires one tooth shape, wood chipboard - the other.
The aluminum material requires its profile of the cutting edge of the saw blade, since the viscosity and the resistance coefficient for this metal are significantly different from the parameters of the wood. But the industry produces a sufficient number of various cutting tools, among which there are saw blades for aluminum, as well as for other non-ferrous metals.