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Blade Grinder – Why You Shouldn't Use One Blade grinders are equipped with blades that look like a propeller (think blenders). They are used to chop coffee beans. They are less expensive than burr mills and are easy to clean, however they don't produce uniform ground and can cause bitterness or over-extraction in your brew. For a first-class coffee experience, you need uniform distribution of the particles. This can only be achieved by using a burr mill. It's no wonder that coffee people who are snobs dislike burr grinders. Inconsistent Grinds If you've used a blade grinder for a while there's a good chance that your grinding results have become inconsistent. The grinding device is likely wear out and dull. As bean grinder coffee machine will produce different sized pieces of beans. This can lead to different levels of coarseness. It's a challenge for your coffee maker to get the same, balanced taste with these different-sized particles. A blade grinder cuts beans by rotating a blade that looks like a propeller. It essentially chops the beans into smaller and smaller chunks, which are then dropped through a screen and into the catcher. While this method works but it's not ideal for making the most perfect grind for your brew. An alternative is a burr grinder. A burr grinder has powerful motors that has two grinding burrs and is a bigger machine. The burrs can be placed at a certain distance apart which determines the coarseness of the coffee being ground. When the burrs are too close together, they will pulverize the beans, rather than cutting them. This results in a finer and less coarse grind. They also tend to be brittle, which can negatively affect the taste of your coffee. On the other hand if the burrs are placed too far apart, they will create large chunks of coarsely-ground coffee. It is important to select a grinder that's setting matches your desired coarseness. A sharp blade, when adjusted properly, will produce a fine and consistent grind for your coffee. If you notice that your grind becoming increasingly more uneven, it's an ideal time to replace the blade or burrs. You should also think about changing the grind setting if you haven't before, as this will aid in achieving a more uniform grind. If your grinder is producing clumped-up grounds it could be an indication that the blades are worn out or damaged. The clumping happens when tiny particles bind to one another and larger pieces of ground are formed, making larger granules that won't dissolve in water. As your burrs become more and more dull, this is more frequent. Uneven Extraction The size of your coffee grounds is vital for flavor extraction, whether you're making a French press pour-over, drip or drip brew. Uneven ground sizes can cause uneven extraction, leading to an unbalanced cup of coffee. The beans are sliced and shredded randomly as they move through the blade mill, resulting in an unbalanced distribution of the size of the grind particles. A blade grinder may produce a mixture of large fragments that are dust-sized, as well as everything between. These different grind sizes extract at an uneven speed, creating the coffee drink that is often bitter and inconsistent. Inconsistency can result in problems with tamping and filtration. With a burr mill you can get an even particle size, allowing better tamping and filtering, which prevents over-extraction. It is harder to achieve an equal grind using a blade. You may need to tap from side to side, or employ the Stockfleth Method (which requires some practice). Another problem with blade grinders is their high speed and heat generation. This can burn the grounds and create a bitter taste. Burr grinders are much cooler and don't produce as much heat, which preserves the flavors of the bean. The blade grinder has one final disadvantage: it's easy to grind your beans to a fine. The grinder can generate lots of heat, and eventually your grounds will become over-extracted. This can result in a bitter drink. To avoid this, always pause your grinder before turning it back on. A blade grinder is an efficient and affordable method of grinding your coffee at home, but it's not the best option for those serious about their coffee brewing. You'll want to stick with whole beans and use a burr grinder to get the best results. You should invest in your brewing experience and purchase a grinder that is of high-quality and will meet every aspect of your coffee needs! If you're ready to upgrade your blade grinder, check out our top choices for the most efficient burr grinders on market. The kind of grinder you select will impact the quality of your brewing as well as your beverage. Consider your budget, space, and preferred method of brewing prior to making your decision. Burned Grounds With a blade grinder is a sharp blade that rotates like a blender at a rapid speed to cut the beans. As the blade rotates at a fast speed, heat is produced which could cause the burning of the coffee grounds. These charred particles aren't good for the brewing process and can cause a bad taste in your cup of coffee. A first-class coffee experience demands uniform distribution of the particles for optimal flavour extraction during the brewing process. This consistency is not achievable with a blade grinder, which breaks the beans into small and large pieces. A burr grinder, on the other hand, achieves a uniform distribution of particles that is reproducible over a wide range of types of brews. Blade grinders offer a variety of advantages, including their low price and speedy operation. However, they do have a few disadvantages like the fact that they produce heat when they are in use and produce different grind sizes, and lack control over the final particle size. There are ways to improve the results with this type of grinder despite its inherent limitations. When used in conjunction with a burr grinder, the user can easily alter the gap between the grinding discs to fine-tune the exact ground size that they prefer. This lets them extract all of the desired flavors from their favorite roasted beans every time. It requires a lot of practice to make a great beverage using a blade grinder. An angle grinder is an extremely powerful tool that should be utilized only by trained professionals. It can cause grinding burn when it is used improperly. This causes localized changes to the metallographic surface of the workpiece. This can lead to cracking that, if not checked, could eventually cause macropitting and tooth fracture. Grinding burns can be caused by a variety of reasons, such as excessive grinding pressure or inadequate cooling. It can be caused by inadequate training for operators. If you are planning to use an angle grinder, make sure you wear the correct PPE, including gloves with a face shield safety glasses, steel toe boots and long sleeves. This will stop any sparks of heat from flying off the machine and striking equipment or people near by. These sparks can reach temperatures as high as 3,600 degrees Fahrenheit and can burn through materials such as paint or metal. Brew that is disappointing A blade grinder chops up your beans in a random fashion and leaves you with beans which are of different sizes. These uneven grounds release at different rates in your coffee maker and this leads to the cup being weak or bitter of coffee. This affects the balance of a good cup – the soluble compounds from the beans are slowly extracted, creating the flavor. You've likely been told that using a burr grinder instead of a blade is the best way to ensure an excellent beverage. Many people don't even know what a burr grinder does. They purchase the flimsy blade grinders that are uncontrollable and difficult to control they can buy at supermarkets and kitchen-type places. Basically, these cheap grinders have a blade with two pronged in the middle of a chamber that spins fast and cuts up whatever it hits, including your coffee beans. Press a button to activate the device and the blade cuts up your beans into a variety of different sized pieces. The smaller pieces fall to the bottom and get chopped all over again, while the large pieces remain towards the top of the chamber. This results in uneven grounds, which are difficult to measure. Another issue with these grinders is that they create lots of heat when they grind, which can burn your beans and ruin your coffee. The heat can also take away some of the flavor of your beans. This leaves you with an unappetizing cup of coffee. If you've been grinding your own coffee with a blade grinder, it's time to retire it and upgrade to something better. A burr grinder can do the job for a fraction of the price and deliver a much better result. It's worth it. If you want more control over your brew, try a manual burr grinder such as the Rhino hand grinder. These grinders have burrs, but are powered by a crank, which provides more control than a plug-in or electric grinder.