Examples are: the action of metalworking tools and planing machines, rip-sawing, turning, planing (when the plane is held parallel to the edge of the board being planed), and chiseling, when the chisel is pushed directly in line with its length.
[Illustration: Fig.63.Straight Cut.] [Illustration: Fig.64.Sliding Cut.] The knife or sliding cut, Fig.

64, takes place when the tool is moved forward obliquely to its cutting edge, either along or across the grain.

It is well illustrated in cutting soft materials, such as bread, meat, rubber, cork, etc.

It is an advantage in delicate chiseling and gouging.

That this sliding action is easier than the straight pressure can easily be proved with a penknife on thin wood, or by planing with the plane held at an angle to, rather than in line with, the direction of the planing motion.