A Dal Splitter machine is used to obtain cracking and scratching of clean pulses passing through it. For loosening the husk to facilitate the subsequent oil penetration this is required. Gradually the clearance between the emery roller and cage (housing) is narrowed from inlet to outlet. Cracking and scratching of husk takes place mainly by friction between pulses and emery as the material is passed through the narrowing clearance. During the operation some of the pulses are de husked and split which are separated by sieving.