Types of Saw Blades
Perhaps the often sighted saw blade is a long steel plate with many saw teeth on one side to saw wood. Actually, besides this traditional woodworking saw blades, there are wide categories of saw blades for various uses. Just say the saw blades’ shape, the base of a saw blade can be a long steel plate, a circular blade, a closed steel band, a thin wire, or of other shapes. The blade’s teeth are often designed to have many styles to fit the needs of cutting different types of objects. Saw blades can also have no teeth but have just a continuous cutting edge.
From the perspective of the material used to make the saw blade, there are common steel saw blades, High Speed Steel (HSS) saw blades, carbide tipped saw blades, solid carbide saw blades, diamond saw blades, etc. Here we say some of them in more detail.
1. High Speed Steel (HSS) Saw Blades
The whole saw blade is made of High Speed Steel (HSS). HSS saw blades are mainly used to cut steel, copper, aluminum and other metal materials. They can also cut non-metallic materials. The grade of HSS greatly influences the performance of the saw blade. HSS saw blades of higher grade HSS have a higher hardness in high temperatures, and often have a longer lifespan. If stainless steel or other high-strength steels is to be cut, HSS saw blades made of cobalt HSS (e.g. M35, M42) should be used, for cobalt can increase the HSS material’s capability to keep its high hardness under the high temperature generated in cutting these high-strength steels.
2. Carbide Tipped Saw Blades
Each of this saw blade’s steel teeth is tipped (via welding) with a small piece of sharp tungsten carbide block. This type of blade is also called TCT (Tungsten Carbide Tipped) saw blade. Carbide tipped saw blades are widely used to cut wood, plywood, laminated board, plastic, grass, aluminum and some other metals. The performance of the blade is greatly influenced by the quality of the small carbide blocks tipped and the number of its teeth, and is also influenced by the quality of the blade’s steel body.
3. Solid Carbide Saw Blades
The whole saw blade is made of tungsten carbide. Comparing with HSS saw blades, solid carbide saw blades have higher hardness under high temperatures, and are more durable, so they have replaced HSS saw blades in many fields. However, the toughness of tungsten carbide is lower than HSS’, so solid carbide blades’ cutting edge can be chipped when the cutting parameters are not proper or the machine is not very precise.
4. Diamond Saw Blades
This type of saw blade has small-sized industrial diamonds (synthetic or natural) fixed on its base to utilize the diamonds to cut (actually grind) hard and brittle, or abrasive materials. As diamond is almost the hardest material on the earth, diamond saw blades can easily cut stone, concrete, asphalt, bricks, glass, ceramics, semiconductor materials, gem stone, etc. The methods by which diamonds are fixed onto the base of the blade include metal bonding, electroplating, vacuum brazing, etc. There are many types of diamond saw blades that are used in various fields.
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