The rod can be slowly turned by hand to adjust the workpiece position, to allow the gear teeth to be cut to an appropriate depth. The method of action is simple. As the tap turns it not only cuts ...

As one gear turns, the other gear must also turn. Where the gears meet, the teeth must both move in the same direction. In the diagram, the teeth of both gears move upwards. This means that the ...

Canine teeth must be sharp and slender enough to puncture prey but also robust enough to resist breakage. Extreme saber morphologies prioritized puncture performance over breakage resistance ...