There is no single best tooth profile for every high-shear homogenizer. The right choice depends on material viscosity, dispersion and emulsification needs, and throughput. Sawtooth, pin, and arc trapezoidal profiles are the three most common types, and each has a clear fit.
Sawtooth profile
Structure: The rotor and stator teeth are sharp sawtooth shapes. Some designs use angled saw teeth. Tooth spacing is tight, the shear zone is concentrated, and shear force is strong.
Applications: Low-viscosity materials below 1000 mPa·s, such as carbonated drinks, personal care emulsions, and water-based architectural coating bases. It refines, emulsifies, and breaks down material quickly. It is often used in lab trials or small-batch production.
Pin profile
Structure: Multiple cylindrical pins are arranged on the rotor and stator. Material repeatedly impacts and splits as it passes through. Overall shear is gentler, with no sharp local high-shear zone.
Applications: High-viscosity materials above 5000 mPa·s, such as biopharma protein formulations, thick hotpot sauces, and oil-based industrial coatings. It avoids over-shearing that can damage heat-sensitive active structures and provides uniform dispersion.
Arc trapezoidal profile
Structure: Stator teeth are trapezoidal or have an arc transition. The gap between rotor and stator teeth is even. The shear zone is wide and stable.
Applications: Medium-viscosity materials from 1000 to 5000 mPa·s. It supports stable continuous batch homogenization. It is widely used in batch sauce production in the food industry and suspension preparation in chemicals, with little throughput fluctuation.
Selection points
Use viscosity as the core indicator. Low viscosity points to sawtooth. High viscosity points to pin. Medium viscosity points to arc trapezoidal.
If the material contains heat-sensitive or shear-sensitive active ingredients, choose pin profile first to protect the material structure.
For large-scale industrial production, choose arc trapezoidal for stable homogenization. For lab or R&D work, modular combined profiles allow flexible adjustment of shear strength.
Hansheng Automation can machine custom rotors, stators, and tooth profiles from customer drawings, in single pieces or small batches. This helps match the profile to the process before full production.
Practical notes
Before selection, run one or two small trial batches to verify profile fit. This avoids material waste or failed homogenization from going straight to production equipment.
Operation should be done by qualified personnel. Before running, check that the tooth gap meets process requirements. An abnormal gap can cause equipment failure or material contamination.
Our precision component customization is not limited to homogenizer rotors and stators. We also machine tobacco packaging machinery parts, yacht precision components, filling machinery parts, RC car precision components, medical device components, printing machinery parts, and food machinery parts. Hansheng Automation works from customer drawings and delivers one-off or batch parts to the required material, tolerance, and surface finish. Our scope is precision components, not complete machines.
