Principle: The Vibro Sifter machine works on the principle of gyratory vibrations. The material is separated based on its particle size. Once the motor gets energized, vibration is caused in the screen/sieve making the material travel across the sieves according to its particle size.  Sifting of Lubricant: Critical Process Parameters: Sieve Size & Integrity of Sieve CPP Acceptance Criteria: Mesh Size & should be integral Critical Quality Attributes: Uniform Particle Size Critical Acceptance Criteria: No lumps be observed