Sonic’s RotoMill has one of the most robust designs on the market today with oversized bearing chamber and movable shaft chamber. This makes for a very stable, long running colloid mill. The same unit allows for single or double flush sealing options without using a larger head.
Colloid Mills are your best solution for particle deagglomeration and primary particle size reduction
Commonly used in the chemical and personal care industries, colloid mills are used to grind the primary particles of solids in a liquid slurry into much smaller sizes. The intent is to create a finer suspension of the solids within the liquid phase. Sonic’s colloid mills are also used to deagglomerate and disperse solids. Agglomerates form when solid particles fuse together. The grinding action of the mill breaks apart these particle clusters so the resulting finished product has a superior appearance and performance.

Overview of Colloid Mill and Colloid Mill Systems
We offer standard units as well as customized systems that incorporate components upstream and downstream. These might include tanks, feed pumps for highly viscous fluids, pressure and flow instrumentation and PLC controls. Colloid Mill Systems are designed to help customers make the best products possible. Highly viscous fluids, like grease or mayo, typically require a feed pump to improve flow rate output of the mill. Gravity flow often isn’t enough. Sonic specializes in system customization to tie your entire process together. We design and fabricate our own PLC controls cabinets and programs to automate your process and provide safe operation.
Sonic’s RotoMill rotors and stators are designed with a patented and proven multi-angular system to provide superior shearing and grinding.
Standard Colloid Mill Design
A standard mill design includes the mill itself with built-in Rotor and Stator, an energy efficient motor operating at various speeds from 900 – 7200 RPM, a motor starter with power disconnect, all assembled on a stainless steel tubular frame. Casters for mobility or rigid leveling legs are standard. A feed funnel is typically included but many customers connect their own tanks or feed vessels.
Sonic pays special attention to detail, providing clean welds on all frames and uprights for electrical cabinets.
- Mill sizes from 2.5 inch to 12 inch
- Lab scale size available
- Motor sizes to 30 HP
- Flow Rates to 1600 GPH
- Inlet Pressures to 100 PSI

Colloid Mill System Customization
Sonic Corp has the technical expertise to customize any of our Mills into complete systems. Because we work with a broad range of PD pumps, instrumentation and components, we understand how to design and fabricate extended systems. We also have comprehensive 3D modeling capabilities to dial in your design. System solutions include:
- Colloid Mill
- Feed PD Pump
- Feed Vessel ranging from small funnel to 1,000 gallon Tanks
- Feed Vessel Premixing and Agitation units
- Heating/Cooling TCUs and jacketed components and piping
- First class Instrumentation by E&H, IFM, Rosemount and more
- Electrical VFD and PLC Cabinets using Allen Bradley, Siemens and more components
- Complete PLC/HMI Automation
- Small scale Lab Carts customized for the lab!