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Blade Grinder – Why You Shouldn't Use One A blade grinder uses propeller-like blades (think blenders) to chop coffee beans. They are cheaper than burr mills, and easier to clean, but they don't create a uniform ground and can cause bitterness and excessive extraction in your coffee. A premium coffee experience requires uniform particle distribution, something that is only possible with the use of a burr grinder. This is the reason why coffee snobs hate burr grinders. Inconsistent Grinds If you've used a grinder with a blade for a while there's a good chance that your grinding results have changed. The machine is likely to become dull and worn. As the grinder wears down it will break up beans into various sizes. This can lead to different levels of coarseness. It's challenging for your coffee maker to extract the same, balanced taste with these different-sized particles. A blade grinder breaks beans by rotating a blade that resembles an engine. It essentially chops the beans into smaller and smaller chunks that are then thrown through a screen and into the catcher. While this method is effective, it's not ideal for producing the best grind for your beverage. A better alternative is the burr grinder. A burr grinder has a powerful motor that has two grinding burrs and is a bigger machine. The burrs are set to the exact distance from one another which determines the fineness of your ground coffee. If the burrs get too close, they will smash rather than cut beans. As a result, the ground that results are less coarse and finer. They also tend to be fragile, which could negatively affect the taste of your coffee. If the burrs however, are too far apart, it will result in large chunks of coffee that have been coarsely ground. It is essential to choose a grinder that has a setting that corresponds to your desired coarseness. A sharp, properly-adjusted blade will yield an even and fine grind for your coffee. If you notice that your grind is becoming more uneven, it may be time to replace the burrs or blade. It is also advisable to change the grind setting if you haven't done so before in order to aid in achieving an even and consistent grind. If your grinder produces clumped-up grounds this could be an indication that the blades are worn out or damaged. The clumping happens because tiny particles stick to each other, and larger pieces of ground, producing larger granules that don't dissolve in water. As your burrs become more and more dull, this will happen more frequently. 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. best burr grinder of the grounds can result in uneven extraction and a sloppy cup of coffee. When the beans are pushed through a grinder blade, they are sliced and shredded randomly, resulting in an uneven distribution of grind particle sizes. A blade grinder can produce a mixture of large pieces that are dust-sized, as well as everything between. These different grind sizes extract at an uneven rate, which results in the coffee drink that is often bitter and inconsistent. Inconsistency can cause problems with tamping or filtration. With a burr grinder you can get an evenly ground particle size that allows for more uniform tamping and filtering which prevents over-extraction and weak brews. It is difficult to achieve an equal grind using a blade grinder. You may need to stamp from side to side, or employ the Stockfleth Method (which requires some practice). Another problem with blade grinders is their speed and heat generation. This can cause the ground to become burned and produce a bitter taste. Burr grinders produce less heat and are cooler, which preserves the flavor of beans. The final drawback of a blade grinder is that it's extremely easy to over-grind your beans. The grinder will generate lots of heat, and, eventually, your beans will be over-extracted. This can result in a bitter brew. To avoid this, always pause the grinder before switching it back on. Using a blade grinder is a simple and affordable method of grinding your own coffee at home, but it's not the ideal choice for those who are serious about their brewing. It is recommended to use whole beans and a burr grinder to get the best results. Make sure you purchase a high-quality coffee grinder that will meet all your needs. If you're looking to upgrade from your blade grinder, look through our top choices for the top burr grinders available on the market. Choosing the right type of grinder is a major decision that will affect the quality of your brewing and overall cup quality so take into consideration your budget, your space and the method you prefer to use when deciding on the best grinder. Grounds burned Grounds A blade grinder employs a sharp blade to grind the beans. The blade spins at high speeds similar to blenders. The blade's speedy movement creates heat, which could burn some of the coffee grounds. These particles will alter the flavor of your coffee and are not ideal for brewing. To ensure a top-quality experience, a uniform distribution of particles is essential to ensure the best flavor extraction. This is not possible with a blade mill that breaks the beans up into large and small pieces. A burr grinder, on the other hand, achieves a uniform distribution of particles that can be replicated across a variety of types of brews. Blade grinders offer a variety of advantages, such as their low price and speedy operation. However, they also have some disadvantages for instance, the fact that they create heat when they are in use, produce inconsistent grind sizes and have no control over the final particle size. With a bit of practice there are ways to improve results despite the inherent limitations of this kind of grinder. When used in conjunction with a burr grinder, users can easily adjust the gap between the grinding discs in order to adjust the exact size of ground that they prefer. This lets users to extract the desired flavor every time they drink their favorite roasted bean. However, creating a quality brew with a blade grinder is a process that requires a lot trial and error. Angle grinders are powerful tools that should only be employed by professionals. If used improperly, it can cause an unsafe condition known as grinding burn which can cause localized changes in the metallographic structure of the workpiece's surface. This can cause cracking that is not properly checked, can eventually lead to teeth fracture and macropitting. Grinding burn can result from a variety of factors, including excessive grinding pressure or inadequate cooling. It could also be caused by poor training for operators. If you are planning to use an angle grinder, make sure to wear the proper PPE, including gloves with a face shield safety glasses, steel-toe boots and long sleeves. This will prevent hot sparks from flying off the wheel and hitting nearby people or equipment. Sparks can be capable of reaching temperatures as high as 3,600 degF and cause damage to materials such as paint or even metal. Brew that is disappointing A blade grinder cuts your beans indiscriminately and leaves you with beans that are all different sizes. This uneven ground extracts at different rates, leading to a weak or bitter cup of coffee. The problem with this is that it destroys the balance that makes a great cup of coffee. Soluble compounds in the beans are extracted over time, which creates the flavor that makes your coffee scrumptious. You've likely heard that using a brewing burr grinder instead of a blade is the best way to guarantee the best beverage. Many people don't understand what a burr mill is. They buy the flimsy, uncontrollable blade grinders they can find in supermarkets and places like kitchens. Basically, these cheap grinders feature a double-pronged blade at the bottom of the chamber that spins rapidly and cuts up whatever it strikes including coffee beans. The blade is activated by pressing an on. It then chops your coffee beans into different size pieces. The small bits drop to the bottom and get chopped all over again, while the larger pieces remain at the top of the chamber. This results in uneven grounds which are difficult to measure. Another issue with these grinders is that they produce lots of heat when they grind, which could damage your beans and ruin the coffee you drink. The heat can also rob some of the flavor from your beans. The result is a not the best cup of coffee. If you've grind your coffee by yourself using a blade mill it's time to upgrade to something more efficient. A burr mill can complete the job for a fraction the price, and produce an even better result. It's worth it. If you're looking for more control over your beverage, try a manual burr grinder, such as the Rhino hand grinder. These grinders have burrs, but they are powered by a crank. This allows you to control the grind more than a plug-in or electrical grinder.