What is the main characteristic of circular sawing?

The main characteristic of circular sawing is that it utilizes a blade that rotates in a circular motion at high speeds. This design enables efficient cutting through various materials. The circular motion allows for a continuous engagement with the material being cut, which results in cleaner cuts and the ability to handle tougher materials compared to other saw types.

The high-speed rotation of the saw blade is crucial because it ensures that the cutting action is effective, allowing the tool to slice through materials quickly. This is typically achieved through powered machinery that can sustain the blade's rotation, providing a consistent cutting edge and minimizing the physical effort required by the operator.

The other characteristics mentioned in the choices, such as the number of teeth on the blade, the method of operation, or material limitations, do not define the core principle of circular sawing. While these aspects may influence the specific performance or applications of the saw, they are not intrinsic to the main characteristic of its operation, which is the circular rotation at high speed.