Flat burrs are favored for their uniform particle size and ability to fully release the layered flavors of coffee, making them widely used in commercial and high-end home coffee equipment. Flat burrs of different sizes (75mm, 80mm, 83mm, 90mm, 98mm) vary significantly in core indicators such as grinding efficiency, capacity, and stability, catering to scenarios ranging from small and medium-sized cafes to large-scale industrial production. Here is a detailed breakdown.

The diameter of flat burrs in coffee grinders directly determines grinding efficiency, particle uniformity, and application scenarios — smaller burrs are more suitable for small-batch, precision-controlled grinding, while larger burrs tend to handle high-load, large-scale operations. The "shear grinding" characteristic of flat burrs exhibits differentiated advantages across different sizes: small-sized burrs focus on fineness, while large-sized burrs prioritize stability and productivity. Below is a detailed analysis of five mainstream sizes: 40mm, 54mm, 60mm, 64mm, and 65mm.