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Blade Grinder – Why You Shouldn't Use One Blade grinders use an e-type propeller (think blenders) to chop coffee beans. They are less expensive than burr grinders and easy to clean but do not produce uniform grounds and can lead to over-extraction and bitterness in your brew. A premium coffee experience requires uniform particle distribution which can only be achieved with the use of a burr grinder. It's not surprising that coffee experts hate burr grinders. Inconsistent Grinds You may have noticed that your grinding results aren't consistent when you've been using a blade grinder over a long period of time. The machine is likely to be worn out and dull. As the grinder wears down, it will chop up beans into various sizes. This results in ground with different degrees of coarseness. With the different sizes of coffee particles, it's hard for your coffee maker to extract an even, consistent flavor. A blade grinder makes use of the same propeller-like blade to break beans. It is basically a way of cutting beans into smaller and smaller chunks and then drops them through a screen and into a catcher. This method is efficient, but it doesn't produce the finest grind possible for your beverage. A better alternative is the burr grinder. A burr grinder is a much larger machine that has a powerful motor and two grinding burrs. The burrs are set at the exact distance from one another which determines the fineness of the coffee you grind. If the burrs are too close, they will pulverize rather than cut the beans. This means that the ground that results are less coarse and finer. They also tend to be soft, which can adversely impact the taste of your coffee. On the other side if the burrs are placed too spread out, they will create large chunks of coarsely-ground coffee. It is essential to select the coffee grinder with an appropriate setting to match the degree of coarseness you prefer. best coffeee grinder , when adjusted properly, will produce a fine and consistent grind for your coffee. If you notice that your grind is becoming increasingly uneven, it may be time to replace the blade or burrs. It is also advisable to change the grind setting if you haven't already, as this will aid in achieving an even and consistent grind. If your grinder is producing clumped-up grounds, it could be an indication that the blades are worn or damaged. The clumping happens due to small particles adhering to one another and larger pieces of grounds producing larger granules which aren't able to dissolve in water. This happens more frequently as your burrs become duller. Uneven Extraction The size of your coffee grounds is important to extract flavor, whether you're using a French press pour-over, drip or drip brew. Uneven ground sizes can lead to uneven extraction and a sloppy cup of coffee. As the beans circulate through a blade grinder, they are cut and shred randomly, resulting in an uneven distribution of grind particle sizes. A blade grinder can create an assortment of large pieces as well as dust-sized particles and everything else. Different grind sizes produce at different rates, resulting in an inconsistent and often bitter cup of coffee. The lack of uniformity also causes problems with the tamping process and filtration. With a burr mill you can achieve a uniform particle size, allowing for better tamping and filtration, which can prevent excessive extraction. If you use a blade grinder, it is more difficult to attain an even grind. You might be tamping from side to side or using the Stockfleth method (which requires some time to master). Another issue with blade grinders is their speed and heat generation. The grounds can be burned and cause a bitter taste. Burr grinders create less heat and are cooler, thus preserving the flavor of the beans. The blade grinder has one last disadvantage: it's easy to grind your beans to a fine. The grinder can generate a lot heat and eventually your grounds will be over-extracted. This can cause a bitter brew. To avoid this, always stop your grinder prior to turning it on again. Blade grinders are an easy cost-effective method to grind coffee at home. However they're not the best option for those who are serious about their coffee-brewing. It is recommended to use whole beans and use a burr grinder for the most effective results. Invest in your brewing experience and purchase a quality grinder that will meet every coffee need! Take a look at our top picks of the best burr mills on the market if you're looking to upgrade your blade grinder. The type of grinder you choose will affect the quality of your brewing as well as your beverage. So, think about your budget, space, and preferred brewing method before making your decision. Grounds Burned Grounds Blade grinders use a sharp blade to crush the beans. The blade rotates at high speeds similar to a blender. As the blade moves at a quick pace, heat is produced which may burn up some of your coffee grounds. These particles will ruin the taste of your coffee and aren't ideal to brew. A top-quality coffee experience requires a uniform particle distribution for the best flavor extraction during the brewing process. This consistency is not achievable with a blade grinder that is able to break the beans into small and large pieces. A burr mill, on the contrary produces a uniform distribution of particle sizes that can be reproduced over a variety of beverages. While the benefits of a blade grinder are its low cost and speedy execution, its main drawbacks are that it generates heat when used, causes inconsistencies in grind size, and has no control over the final particle size. There are ways to increase the efficiency with this kind of grinder despite its inherent limitations. When combined with a burr grinder users can easily adjust the gap between the grinding discs to fine-tune the exact size of ground of their preference. This allows them to extract the flavor they desire every time from their favorite coffee beans. It requires a lot of practice to make a great drink using a grinder blade. Angle grinders are powerful tools that should only be used by professionals. It can cause grinding burn if it is used improperly. This can cause localized changes to the metallographic surface of the workpiece. This can lead to cracking that, if unchecked will eventually lead to macropitting and tooth fracture. Grinding burn can be caused by many factors, including excessive grinding pressure or insufficient cooling. It could be caused by inadequate operator training. If you intend to use an angle grinder, be sure you wear the appropriate PPE including gloves with a face shield safety glasses, steel toe boots and long sleeves. This will stop hot sparks from flying off the wheel and hitting nearby people or equipment. These sparks can be as hot as 3,600 degF, and can be able to burn through paint or even metal. Brew that is disappointing A blade grinder can chop your beans in a random manner and result in different-sized beans. This uneven ground extracts at different rates, resulting in an unbalanced or bitter cup of coffee. This ruins the balance of a good cup. The soluble compounds from your beans are slowly extracted, creating the flavor. You've probably heard that using a burr grinder instead of a blade is the best way to ensure a great drink. Many people don't understand what a burr mill does. They purchase the cheap, uncontrollable blade grinders they can purchase at the supermarkets or kitchen-type places. The basic idea is that these grinders have a blade with two pronged in the middle of a chamber that spins rapidly and cuts up whatever it comes into contact with such as coffee beans. The blade is activated by pressing the button. It then chops your coffee beans into various sizes. The small bits are tossed to the bottom, and get chopped all over again, while the larger pieces remain towards the top of the chamber. This causes uneven grounds which are difficult to determine. Another problem with these grinders is that they create lots of heat when they grind, which could burn your beans and ruin your coffee. The heat also removes some of the flavor the beans, which means you're left with a less-than-delicious cup of coffee. If you have been grinding your coffee with a blade mill, it's now time to upgrade to a more effective. A burr mill can do the job for a fraction the price, and produce the same results. It's well worth the investment. Try an manual burr mill, such as the Rhino Hand Grinder if want to have more control over your beverage. These grinders feature burrs however they are powered by the crank, which gives more control than an electric or plug-in grinder.