Once you have decided on a conical mill for your process, you then have a choice between over-driven and under-driven models. The main difference between the two models is the location of the motor relative to the cone rotor. Both options will have advantages in different applications, so it is important to know the process and material specifics in question before deciding.
Here’s a brief guide that highlights the key differences between the under-driven and over-driven conical mills.
Under-Driven Conical Mill Benefits
> Spacer-less design with preset optimised gap for milling. Spacers are time consuming to set up and heighten the risk of operator error in setting the gap correctly. The spacer-less design eliminates these issues.
> In-line feed and discharge for higher capacity milling. As the inlet is in-line with the outlet on the milling chamber, this makes it better for in-line processing (e.g. container to container milling) and easier system integration due to the minimal stack-up height.
> Hygienic, easy clean design. Detachable mill head allows the chamber to be removed from the machine for easier cleaning.
Over-Driven Conical Mill Benefits
> Perfect for heat sensitive materials. An over-driven cone mill uses a belt-driven gearbox. This runs cooler than the gear driven alternative. This means that the machine is able to run at a cooler temperature and is, therefore, better suited for milling heat sensitive materials.
> Robust design for more rugged applications. The belt-driven design is generally more robust and better suited to the particle size reduction of tougher materials and plant-like matter.
> Ability to change the gap between the screen and impeller. The over-driven cone mill uses spacers to set the gap. This enables the operator to alter the gap depending on the material being processed.
> Low noise for a better working environment. Another advantage of this design is the lower noise created due to the belt-driven operation compared to mechanical gears.
Ultimately, the choice between an over-driven or an under-driven conical mill will be determined by your application specifics. We have an experienced team of engineers who are able guide you through the different options available, so that you are able to choose the mill that delivers the best results for your application.
We have more information available on our cone mills on the following pages;
Get in Touch
If you would like to speak to one of our experts regarding our Over-Driven and Under-Driven Conical Mill models or you would like a quote for one of our products, send us a message using our Contact Form or call us on +44 (0)1702 549 777.
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