Why Your K Ultra Burrs Might Look Different—and What That Means for Your Brew

Here’s what you need to know: The K Ultra burrs in your 1zpresso grinder might not be identical—and that’s normal. If you’ve noticed subtle differences in their geometry, you’re not alone. These variations can stem from manufacturing tolerances, generational updates, or even the way the burrs are assembled. The key isn’t to panic but to understand how these differences might impact your grind.

The burr on the right, with its longer cutting teeth at the bottom, likely offers a finer grind at lower settings. This could translate to more extraction in your shot, but it risks over-extraction if not dialed precisely. The left burr’s larger unserrated area at the top suggests a coarser grind range, which might be better for slower extraction or lower-pressure brewing methods. These aren’t flaws—they’re design choices that cater to different preferences.

But here’s the catch: Burrs aren’t just about aesthetics. The geometry affects how evenly coffee particles are cut. A burr with more serrations (like the right one) can create a tighter grind distribution, while a burr with broader flat areas (like the left) might allow for a more open grind. Neither is inherently “better”—it’s about matching the burr’s characteristics to your brewing style.

If you’re unsure which to choose, test both. Start with the burr that aligns with your usual grind settings. If you’re hitting inconsistencies, adjust the grind size or dial in your tamp pressure. The goal isn’t uniformity—it’s balance.

What’s your go-to method for troubleshooting inconsistent grinds? Share your setup in the comments.

Questions & Answers

Information sourced from industry reports and news outlets.