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Blade Grinder – Why You Shouldn't Use One A blade grinder uses an e-type propeller (think blenders) to chop coffee beans. They are less expensive than burr mills and easy to clean, however they don't produce uniform ground and can cause bitterness and over-extraction in your brew. A premium coffee experience requires uniform particle distribution, something that can only be achieved with a burr grinder. This is why coffee snobs hate burr grinders. Inconsistent Grinds You may have noticed your grinding results are inconsistent when you've been using a blade grinder over a long period of time. The grinder is likely to be worn out and dull. As the grinder wears out it will cut beans into different-sized pieces. This can lead to different levels of coarseness. It's difficult for your coffee brewer to get the same, balanced taste with these various-sized particles. A blade grinder makes use of a propeller-like rotating blade to break beans. It basically chops the beans into smaller and smaller pieces, which are then dropped through a screen into a catcher. Although this method is effective, it's not ideal to get the perfect grind for your drink. An alternative is the burr grinder. A burr grinder comes with an efficient motor, two grinding burrs and is a larger machine. The burrs can be set to a certain distance, which will determine the coarseness of the coffee being ground. If the burrs are too close together, they will pulverize the beans rather than cut them. The result is a more fine, less coarse ground. They also tend to be soft, which can adversely impact the taste of your coffee. If the burrs, however, are not evenly spaced they will result in large chunks of coffee that have been coarsely ground. It's important to choose the grinder that's setting matches the desired coarseness. A sharp blade, adjusted properly, will produce a fine and consistent grind for your coffee. If you notice that your grind is becoming more uneven, it could be time to replace the burrs or the blade. You should also think about changing the grind setting if you haven't done so previously in order to allow you to achieve an even and consistent grind. If your grinder is producing clumped-up grounds this could be a sign the blades are worn out or damaged. The clumping occurs due to tiny particles bonded to one another and larger pieces of grounds producing larger granules which do not dissolve well in water. This will happen more often as your burrs get duller. Uneven Extraction The size of your coffee grounds is vital for flavor extraction, regardless of whether you're using a French press pour-over, drip or drip brew. Uneven ground sizes lead to uneven extraction and an unbalanced cup of coffee. When the beans are pushed through a grinder blade, they are cut and shredded randomly, leading to an uneven distribution of grind particle sizes. A blade grinder can create a mix of large pieces that are dust-sized, as well as everything else in between. These different grind sizes are extracted at a different rate, which results in the coffee drink that is usually bitter and inconsistent. Uneven distribution can result in problems with tamping and filtering. With a burr grinder, you can attain an even particle size, allowing for more even tamping and filtration which prevents over-extraction and weak beers. With a blade grinder it is more difficult to get an even grind, and you might be tamping from side to side or using the Stockfleth method (which takes some time to master). The high speed and heat generated by blade grinders are another issue. They can cause the ground to burn and create a bitter taste. Burr grinders are more cool and don't produce as much heat, which preserves the flavor of the beans. The blade grinder has a final disadvantage: it is very easy to grind your beans to a fine. The grinder will produce plenty of heat and your beans will eventually become over-extracted. This will result in a bitter brew. To avoid this, pause your grinder before turning it on again. Blade grinders are an easy cost-effective method to grind coffee at home. However they're not the ideal option 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 will meet all your needs. Take a look at our top picks of top burr mills available on the market if you're looking to upgrade your blade grinder. The right choice of grinder is a crucial choice that will impact the brewing process and overall cup quality therefore, you should consider your budget, your space, and the method you prefer to use when making your decision. Grounds Burned Grounds Blade grinders use sharp blades to grind the beans. The blade rotates at high speeds similar to blenders. The speed of the blade's movement generates heat, which can burn some of the coffee grounds. These charred particles aren't good for the brewing process and will create an unpleasant taste in your cup of coffee. For a truly exceptional experience an even distribution of particles is required for optimal flavour extraction. Since blade grinders break the beans into unevenly sized pieces, large and small it is difficult to achieve this consistency. A burr grinder, on the other hand can ensure a uniform distribution of particles that can be reproduced over many types of brews. While the advantages of a grinder with blades include its low cost and speedy operation, its clear disadvantages are that it produces heat when it is used, creates irregularities in the size of the grind, and is not able to control the final particle size. There are ways to improve results using this type of grinder despite its inherent limitations. When a burr mill, the user is able to easily adjust their desired grind size by adjusting the distance between the discs. This allows them to extract all desired flavours from their favourite roasted beans every time. It requires a lot of practice to make a great beverage using a blade grinder. Angle grinders are powerful tools that should only be employed by professionals. If it is used incorrectly it could cause a dangerous condition known as grinding burn that causes localized changes to the metallographic structure of the surface of the workpiece. This can cause cracks that, if unchecked could eventually lead to macropitting and tooth fracture. Grinding burns can be caused by a variety of factors, including excessive grinding pressure or inadequate cooling. It can also be caused by poor instruction for the operator. Wear the appropriate PPE when using an angle grinder. This includes safety glasses as well as a face shield and steel toe boots. This will stop hot sparks from escaping the machine and hitting nearby equipment or people. These sparks are capable of reaching temperatures up to 3,600 degF, and can burn through materials like paint or metal. Brew that is not what you expected. Blade grinders chop your beans in a random fashion and leaves you with ground which are of different sizes. These uneven grounds are extracted at different rates in your coffee maker which results in a bitter or weak cup of brew. The issue with this is that it can ruin the balance that makes a good cup of coffee. Soluble compounds in the beans are removed in time, and this creates the flavor that makes your coffee scrumptious. It's likely that you've heard that using the burr mill rather than blade mills is the best way to make a great beer. However, many people don't know how to use a grinder or even what it does and so they purchase one of the inexpensive, inflexible blade grinders readily available in kitchen and grocery store places. compact coffee grinder Coffeee are basically two-pronged blades that are located at the bottom of an enclosed chamber. It spins rapidly and cuts anything it comes in contact with, including beans. The blade is activated by pressing the button. It then chops coffee beans into various size pieces. Small pieces are pushed to the bottom of the chamber, and are then chopped up again, whereas the larger pieces remain at the top. This causes uneven ground, which are difficult to measure. These grinders can also cause burns to your beans and ruin the coffee. The heat can also take away some of the flavor of your beans. This can leave you with a an unappetizing cup of coffee. If you've been grinding your coffee yourself with a blade mill, it's time to upgrade to a more effective. A burr mill will do the job for a fraction the cost, and will produce the same results. It's worth it. Try a manual burr mill like the Rhino Hand Grinder if you want greater control over the brew. These grinders are equipped with burrs but are powered by cranks. This gives you more control than an electrical or plug-in grinder.