Types of Teeth
Wouldn't it be great if you could have one saw that cuts:
both across and along the grain
on the push and pull
one saw that's twice as fast?
The obvious need for greater speed and competitive advantage lead to the development of the universal tooth profile, commonly available today.
How is this achieved?
Universal teeth are precision ground on both angles to give a cutting edge for both push and pull strokes and are ground alternately on the left and right sides.
It's a fact that the faster the sawdust can be cleared from the cut, the faster the saw will cut through the wood.
The space between the teeth (gullet) is where the saw dust sits before it's cleared from the cut. The more space there is, the more sawdust can be cleared and the faster the saw cuts.
Having an aggressive tooth profile (one with a deep gullet) does this effectively, this lead to the more recent development of the Fleam tooth profile.
Also known as straight teeth or peg teeth, fleam teeth can cut along and across the grain and on the push and pull stroke. However, there is a drawback. Having such a large tooth profile means that the teeth can dig in when you start, making it awkward to get the cut going.