how to choose the right blade

1, the blade selected basic data:
① saw blade outer diameter, the hole diameter;
② cutting object's material, shape and thickness;
③ cutter spindle speed.
2, saw the basis for selection:
International requirements for timber cutting line speed of 40 ~ 70M / S. The industrial sheet metal due to quality and sawn boards are better quality, better quality welding, cutting speed can exceed 80M / S, generic tablets, DIY film quality due to alloy and  sds drill bits sawn boards are poor quality, cutting speed should be relatively low Some.
Cutting speed is too small, the production efficiency; while rapid increase friction, heat stability decreased saws, alloy damage accelerated decline in the quality of the workpiece surface.
Cutting speed is too large, the  concrete saws friction heat increases, machine vibration, noise is also large, cutting stability decreased, the surface quality of the workpiece is decreased; cutting material of the alloy also increases impact resistance, chipping prone alloy phenomenon.
In practice, by reducing the diameter of the methods to reduce the cutting blade speed; speed to increase by increasing the cutting speed.
Second, on the question blade purchase price
Carbide also has high hardness (wear resistance) and brittleness (poor impact resistance) characteristics, the carbide saw blades  characteristics determine the most wear-resistant alloys are not accompanied by the best saws can get the longest use life. However, the object can be cut material properties, thickness, quality requirements to select a different hardness, strength of the alloy and the rational design of the tooth to achieve the best match between, get the longest life, the highest cost performance.