1;:Discontinuous or segmental chip:
Discontinuous chips is formed by a series of rupture occurring approximately perpendicular to the tool place face’ each chip element passing off along the tool face the chip element’ in the form of small segment may adhere loosely to each other and becomes slightly longer.
Since the chips break up into small segments the friction between the tool and the chips reduces’ resulting in better surface finish. These chips are convenient to collect’ handle and dispose off. Discontinuous chips tends to be formed when one or more or the following conditions exist:
1. Brittle material , such as cast iron and bronze.
2. large chip thickness
3. low cutting speed
4. small rack angle
Discontinuous chips are also produced when cutting more ductile material with the use of a cutting fluid.