Principle: The Disintegrator works on the principle of impact.
Construction: The Disintegrator consists of steel drum having a shaft in the centre. The shaft contains a disc, on which four beaters are fixed. The shaft rotates with a speed of 5000 to 7000 RPM .The side and upper inner surface of the drum is rough and undulating. The lower part of the drum has a detachable screen or sieve.
Working: The beaters are mainly responsible for grinding but are helped by the undulation of the inner surface and roughness of drum. The material is fed to beaters through hopper which is fitted to the drum. The material is broken into small particles by impact of the beaters. Due to high velocity of beaters the air velocity inside the chamber is increased. The air is allowed to pass through an outlet on which dust bag is tied which retains the fine particles of powder.
Diagram :
Use: This mill is used to powder all types of drugs including very hard drugs.