End Runner Mill / Mechanical Mortar and Pestle – Pharmaceutical Engineering B. Pharm Third Semester PDF Notes

End Runner Mill / Mechanical Mortar and Pestle


End Runner Mill / Mechanical Mortar and Pestle

End runner mills and mechanical mortar and pestles, often referred to as the unsung heroes of various industries, play a crucial role in processes ranging from pharmaceuticals and food production to laboratory research. These machines are designed to crush, grind, and blend substances efficiently, making them indispensable tools in today’s world.


Size reduction is done by crushing or compression due to heavy weight of steel pestle. Shearing stress is also involved during the movement of mortar and pestle


   A steel mortar is fixed to a flanged plate

   Underneath the flanged plate, a beveled cog fitting is attached to a horizontal shaft with a pulley

   Dumb bell shaped pestle is flat rather than round

   The pestle carries a hinged arm for emptying and cleaning


The material to be ground is placed in the mortar

The scraper puts the material in the path of the pestle

The mortar revolves at high speed

The pestle is placed in the mortar

The rotating mortar causes the pestle to revolve

Thus size reduction is achieved by shearing as well as crushing

The material is collected and passed through a sieve to get the powder of desired size


Suitable for fine grinding

Advantages of End Runner Mills

The use of end runner mills offers numerous advantages, making them an attractive choice for industries worldwide.

High Efficiency- End runner mills are highly efficient in grinding and mixing tasks. They can handle tough materials and achieve consistent results, ensuring product quality and uniformity.

Customization Options- These mills offer customization options to meet specific industry needs. The design, materials, and runner configurations can be tailored to suit different applications.

Cost-Effectiveness- End runner mills are cost-effective in the long run. They minimize material wastage and reduce the need for manual labor, making them an economical choice for many industries.


Not suitable for unbroken drugs

Frequently Asked Questions (FAQs)

1. What are the primary differences between end runner mills and mechanical mortar and pestles?

End runner mills are known for their speed and efficiency in crushing and blending, making them ideal for high-volume production. Mechanical mortar and pestles are suitable for smaller-scale operations and precise grinding.

2. How can I ensure the safety of operators and equipment when using these machines?

Operators should be trained on the safe use of equipment, and regular inspections and maintenance should be performed to ensure equipment safety.

3. What are some common mistakes to avoid when selecting these machines for my application?

Common mistakes include neglecting maintenance requirements, selecting a machine that doesn’t align with your application, and overlooking safety protocols.

4. What are some future innovations in the field of mechanical equipment like end runner mills and mechanical mortar and pestles?

Technological advancements and sustainability efforts are key areas of development in this field. Innovations in materials and technologies continue to enhance efficiency and performance.

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