A colloid mill is a machine that is used to reduce the particle size of a solid in suspension in a liquid, or to reduce the droplet size of a liquid suspended in another liquid. The colloid mill operates by subjecting the materials to intense shear forces between a stationary stator and a high-speed rotating rotor. The rotor has concentrically arranged teeth or ridges that interact with the stator's fixed teeth, creating a high-shear zone. The material is fed into the mill through a hopper and is forced through the narrow gap between the rotor and the stator, resulting in size reduction and dispersion.
| Model / Size | BMCM 250 | BMCM 500 |
| Output Capacity[Liter/Hr] * | 145 to 1400 | 145 to 2400 |
| Hopper Capacity (Liter) | 15 | 20 |
| Grinding Accuracy (Micron) | 5 to 10 | 5 to 10 |
| Motor (Hp) | 3.0 | 5.0 |