What is that bimetal band saw blade?
Bi metal band saw blades is made up to two metals that have been joined together. Instead of mixing the two types of metal, the bimetal band saw blade consists of two layers of metal that are bonded together through welding. For example, high speed steel is bonded to a high strength carbon steel base to achieve a better combination of cutting speed and durability. The advantages and disadvantages of each metal are applied in the right locations. Teeth that is harder can cut better but it also tends to get brittle but this is offset by the softness of the body area of the band that is less brittle and will be more resistant to cracking and breaking. Bimetal blades however are more expensive than carbon blades but they become more economical in the long run because of their longer life that can outlast the carbon blades when used properly.
How to choose the right metal band saw blades for wood cutting
Carbon tool steel is a common material used for metal band saw blades because it is more economical. Carbon tool steel blade has the capability to cut through mild steel when used at speeds that are less than 200 feet per minute and preferably with a coolant to gain the best results. The blade is also used on most vertical wood cutting band saws that are 10” and more. However, for heavy production and for craftsmen who demand the best type of blade, metal band saw blades with carbide tips are the best option. The carbide tipped band saw blade is extremely good at fast cutting and it has the longest life among the metal band saw blades used in wood cutting. It is also frequently used for re-sawing expensive hardwoods that require careful conservation of the material due to its high price.
The owner’s manual may indicate that you can use the wood cutting band saw for cutting metal but it can only be used for soft metals like aluminum, brass and copper to prevent damages on the band saw blade. Cutting steel using the speed of wood cutting can damage the blades because of the extreme heat generated.
High speed steel that is also called tool steel is a lot tougher than carbon steel and more tolerant of high temperature without compromising its hardness. It has a faster cutting speed making it perfect for fabrication and metal forming processes. It stays sharp longer under extreme temperatures and conditions in production cutting operations compared to conventional metal band saw blades.