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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 they don't yield uniform grounds and can cause over-extraction and bitterness in your brew. A top-quality coffee experience requires uniform distribution of the particles which can only be achieved with the use of a burr grinder. It's no wonder that coffee experts hate them. Inconsistent Grinds You may have noticed your grinding results are inconsistent when you've been using a blade grinder over a long time. The grinder is likely to become dull and worn. As the grinder wears out it will break up beans into various sizes. This will result in different degrees of coarseness. It's difficult for your coffee brewer to create a consistent, balanced flavor with these various-sized particles. A blade grinder uses an e-rotating blade that resembles a propeller to break the beans. It chops beans into smaller and smaller pieces, which are then put into a catcher via a screen. This technique is efficient however it's not the best grind possible for your drink. A better alternative is a burr grinder. A burr grinder is a much bigger machine, with a large motor and two grinding burrs. The burrs can be placed at a specific distance which determines the quality of the coffee being ground. When the burrs are too close to each other, they will crush the beans rather than cut them. This means that the resultant grounds are less coarse and finer. They may also be brittle and alter the flavor of your coffee. On the other side when the burrs are placed too far apart, they will result in large chunks of coarsely-ground coffee. It is crucial to select the coffee grinder with an adjustment that is in line with the coarseness you desire. A sharp, well-adjusted blade will result in a consistent and fine grind for your coffee. If you find that your grind is becoming more and more uneven, it's probably best to replace the blade or burrs. It is also advisable to change the grind setting in case you haven't previously in order to aid in achieving a more uniform grind. If your grinder produces clumped-up grounds this could be an indication that the blades have worn out or damaged. The clumping happens when small particles adhere to one another and larger pieces of ground form, making larger granules that won't dissolve in water. This is more frequent as your burrs become duller. Uneven Extraction Whether you're brewing drip, French press, or pour-over, the size of your grounds plays an important role in the extraction of flavor. ceramic grinder can lead to uneven extraction and an unbalanced cup of coffee. As the beans circulate through a grinder blade, they are cut and shredded randomly, leading to an uneven distribution of grind particle sizes. A blade grinder produces an assortment of larger fragments, small particles and everything in between. These different grind sizes extract at an uneven rate, which results in the cup of coffee that is often bitter and inconsistent. Inconsistency can cause problems with tamping or filtering. With a burr mill you can get a uniform particle size, which allows for better tamping and filtration which prevents over-extraction. It is difficult to achieve a consistent grind with a blade grinder. You may need to tamp from side to side or use the Stockfleth Method (which requires some practice). Another problem with blade grinders is their speed and high heat generation. The grounds can be burned and produce a bitter flavor. Burr grinders are more cool and don't generate as much heat, which preserves the flavors of the bean. The final drawback of grinding with a blade is that it's very easy to over-grind your beans. The grinder will generate plenty of heat and eventually your grounds will be over-extracted. This can result in a bitter drink. To avoid this, you should always stop the grinder before turning it back on again. Blade grinders are a simple and inexpensive method of grinding coffee at home. However they're not the ideal choice for those who are serious about their coffee brewing. For the best results, you'll want to use a burr mill and whole beans. Consider investing in a top coffee grinder that can meet all your needs. Check out our top choices of the best burr mills on the market to upgrade your blade grinder. The type of grinder you choose will impact the quality of your brewing, as well as your beverage. So, think about your budget, space and preferred brewing method before making a decision. Burned Grounds With the blade grinder, you're using a sharp blade that spins like a blender at a rapid speed to chop up the beans. When the blade spins at a fast speed there is a lot of heat produced that could cause the burning of the grounds of coffee. These charred particles aren't good for brewing and can cause a bad taste in your coffee. A first-class coffee experience demands a uniform particle distribution for the best flavor extraction during the brewing process. This consistency is impossible with a blade grinder that is able to break the beans up into small and large pieces. A burr mill, on the contrary produces an even distribution of particle sizes that can be reproduced over a variety of beverages. Blade grinders have many advantages, including their low price and speedy operation. However, they have some drawbacks, such as the fact that they create heat when in use and can produce inconsistent grind sizes, and lack control over the final particle size. There are ways to increase the efficiency using this type of grinder, despite its inherent limitations. When a burr mill, the user can easily adjust their desired grind size by adjusting the gap between the discs. This lets users to extract the desired flavor every time from their favourite roast beans. However, making a good drink using a blade grinder is a process that requires a lot trial and trial and. An angle grinder is a potent tool that should only be used only by trained personnel. If it is used incorrectly it can result in the dangerous condition known as grinding burn which can cause localized changes in the metallographic structure of the surface of the workpiece. This can cause cracking and should be checked. If not, it could lead to macropitting and tooth fracture. Grinding burn is a serious issue that can be caused by a range of factors, including excessive grinding pressure, inadequate cooling, or inadequate operator training. Wear the correct safety equipment when using an angle grinder. This includes safety glasses with a face shield as well as steel toe boots. This will prevent sparks of heat from flying off the machine and hitting equipment or people near by. Sparks can be as hot as 3,600 degF, and are capable of burning through paint or even metal. Disappointing Brew A blade grinder can chop your beans up indiscriminately and leave you with different-sized ground. This uneven ground extracts at different rates, resulting in an unbalanced or bitter cup of coffee. The problem with this is that it can ruin the balance that makes for a great cup of coffee. The soluble compounds in the beans are extracted over time, resulting in the flavor that makes your coffee scrumptious. You've probably heard that using a brewing burr grinder instead of a blade is the best method to ensure the best brew. A lot of people don't know what a burr grinder does. They purchase the flimsy, uncontrollable blade grinders they can find in supermarkets and places like kitchens. These grinders are basically a two-pronged blade that is at the bottom of an enclosed chamber. It spins quickly and chops everything it comes into contact with, including your beans. The blade is activated by pressing an on. It then chops your coffee beans into 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 causes uneven ground which are difficult to determine. These grinders can also burn your beans which can ruin the coffee. The heat can also take away some of the flavor your beans, so you're left with a mediocre cup of coffee. If you have been grinding your coffee with a blade mill, it's time to upgrade to something more efficient. A burr mill will do the job for a fraction the cost, and provide the same results. It's well worth the investment. Try an manual burr mill, such as the Rhino Hand Grinder if you want more control over your beverage. These grinders are equipped with burrs however, they are powered by a crank. This gives you more control than a plug-in electrical grinder.