What characterizes a bi-metal band saw blade?

A bi-metal band saw blade is designed with a flexible back and hard teeth, which is key to its functionality and performance. The flexible back is typically made from a tough steel alloy that allows the blade to flex without breaking. This flexibility enables the blade to withstand the stresses of cutting, particularly in applications that require maneuverability or the ability to navigate through tight curves.

The hard teeth, often made from high-speed steel or cobalt, are capable of maintaining a sharp cutting edge at high speeds and under heavy loads. This dual material construction combines the benefits of flexibility and hardness, allowing the blade to effectively cut through various materials while providing resilience against wear and deformation.

The fact that the back is flexible while the teeth are hard is crucial because it allows the blade to absorb shock and reduce the risk of damage during cutting operations. Other options, such as single material construction or rigid and uniform thickness, do not provide the same advantages, as single-material blades lack the necessary flexibility and cutting efficiency exhibited by bi-metal blades.