Colloid Mill

Our Greerco Colloid Mill is the most versatile high-shear mixer available.


Mixing Mechanism

1. The first mixing zone uses sharp stator teeth to mill the fluid.
2. Next, fine serrations accelerate the fluid between the ultra-smooth, hardened surfaces of the spinning rotor and stator gap.
3. Finally, centrifugal forces impinge fluid on the stator wall for additional refinement.

Standard Mill Construction

  • 316 stainless steel (SS) wetted parts impregnated with Stellite™ for high wear resistance
  • Jacketed stator housing with SS connections
  • Lip seal shaft sealing
  • Explosion-proof motors
  • Painted base and supports
  • Viton elastomers
  • Sanitary, triclamp connections

Optional Features

  • Alternative rotor-stator design
  • Mechanical seals
  • 440 hardened SS rotor-stator
  • Alternative motor enclosures
  • All SS supports and base
  • Push cart with casters for mobility
  • Macerating knife


  • The rotor-stator gap can be adjusted on-the-fly by turning a hand wheel.
  • Changing the gap setting allows the user to modify the shear rate applied to the fluid and achieve the desired process results.
  • Indicator dial defines gap-setting position and ensures process repeatability.
  • This machine is designed to handle a wide range of applications and empowers the user to make simple adjustments to achieve the precise product qualities required.
  • Vertical or horizontal mounting position makes the colloid mill ideal for batch, batch-continuous, or in-line applications.
  • Due to the nature of most high-shear applications, we offer an extensive rental pool for confirming the impact of Greerco™ high-shear technology on your process.

Cost Effective Solution

  • Initial investment: Unlike competitive designs, the versatility of the Greerco Colloid Mill eliminates the need for the costly add-ons typically offered to achieve optimal process results
  • Process: Easy installation and operation maximize process productivity while reducing cost
  • Longevity: Time-tested design has been proven to provide years of continuous operations with minimal maintenance costs
  • Greerco High Shear Mixers Catalog

  • High Shear Colloid Mill IO&M Manual