The Global Leader

Wherever grinding happens, Hemro is there.

As the industry-leading manufacturer of coffee grinding components, Hemro is trusted by thousands of brands that need reliable precision and consistency. We’re honored to participate in creating millions of quality coffee moments each day through our Component Solutions partners.

Burrs

At Hemro Group, we believe in the value of flat steel burrs and reflect this in our four international brands Mahlkönig, Ditting, Anfim, and HeyCafé. We are the global leader in flat steel burr production and support our brands and the industry through our state-of-the-art burr production in Hamburg, Germany.

Flat steel burrs are one of the most common burr types used in coffee grinders. They consist of two flat discs with sharp teeth arranged in specific patterns and facing each other. The burrs share a virtual axis of rotation, whereby one of the burrs is stationary, and the other burr rotates to draw coffee beans between both sets of teeth. The beans are crushed and ground into small particles as they pass through the burrs. The shape and size of the burrs and the distance between them affect the grind size and consistency. Flat steel burrs are known for producing a uniform and consistent grind, making them popular within communities of professional baristas and coffee enthusiasts.

At Hemro, we believe in “special steel” burrs with a higher carbon content (such as 1.2436) to keep the burr’s performance over its lifetime. Our burrs undergo an industry-leading refinement process, described with the following process steps:

1. Cutting: steel rods/bars made from special steel are cut into discs of equal width
2. Annealing: the discs then undergo heat treatment to eliminate internal material stresses to allow for easier machining and to prevent post-hardening deformation
3. Machining: after annealing, the discs are precision machined to form the “burr” geometry
4. Hardening: the burrs are then hardened, which is key to increasing lifetime resilience
5. Blasting and other deburring: our burrs are blasted or deburred to prevent settling behavior or shard and metal pieces migrating into coffee grinds
6. Regulatory conformity: As a final step, our burrs undergo a material migration test for food safety and are listed in each grinder’s certification report

Let’s Partner

Reach out to learn about our grinding technology, component capabilities, and partnership options.