Why are Blenders So Loud?

A blender is an important kitchen tool that is used almost regularly. It’s easy to use and can help homeowners to serve drinks, smoothies, and ice cream in seconds. The only inconvenience that it causes is its loud noise. Nobody likes to such loud disturbing noises, especially when guests are at home.

Nowadays, however, the latest designs of blenders come with noise-canceling features. Even then, blenders do make noises, though less as compared to the traditional ones. If you ever wonder why are blenders so loud, you have come to the right place. In this post, we have discussed the various reasons that explain why blenders make noises.

Why are Blenders so Loud?

Why are Blenders so Loud

Needless to say, these home appliances are complicated devices that need a high amount of precision to function properly. Most people don’t realize that.

If you ever remove its parts, you would find a high-speed electric motor, that’s the prime component of the blender.

Next, you would also find lots of gears, bearings, blades, etc. Now when you run the blender, you set all of these components in motion. That’s why they create vibration in the process. Vibrations turn into noise, because a large number of tiny components run at high speed, under significant load.

This is the primary reason that explains why blenders make noise when used. Below, we have discussed individual reasons that contribute to noise emission.

Low Cost Blender Design

Oftentimes, people buy low-budget models of blenders. The low-quality blenders come with low-quality components, which tend to malfunction any day. If you ever compare a cheap blender with that of an expensive one, you would notice a considerable difference between the noise emitted. The former one is louder because they are made from metal or plastic. Expensive blenders are not only made up of premium quality products but are also equipped with noise-absorbing features.

Steel Blender Blades 

Steel Blender Blades 

Most low-cost blenders come with steel blades. Now the issue with steel is that this metal is quite abrasive. However, with modern techniques, the blades are softened, to mitigate the issue of noise.

Even then, steel blades continue to produce loud noises, when the blender is used. These blades produce a very uncomfortable grinding noise.

More Powerful Blender Motor

The motor pulley must get power for the motor to spin and do the work. This is enabled through a pulley mechanism and a belt. Usually, blenders have a speed of around 50-100 RPMs.

Now if it’s a top-quality blender, its capacity is expected to be 250 RPMs. Electric blenders require the use of electromagnets to function. Now, the stronger the magnetic power, the more electricity it draws from the power source to let the motor spin faster, thereby producing an even louder noise.

High RPM Required by Blender

Some of the latest blenders come with a capacity of up to 2500 RPMs. This speed is almost double what a standard blender is capable of. When the motor has to spin so fast, it obviously requires more power. In the process, the motor starts to get heated up.

Sometimes this causes a serious breakdown. In this case, the motor also has to bear excessive pressure, becoming so loud sometimes.


Irrespective of whatever you are planning to make, you must turn on the blender. Right from the time you start it, the motor keeps running at high speeds. The blades also have to run at the same speed to grind everything in the pitcher. This entire process causes loud noise.

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Why Does My Blender make a Grinding or Squealing Noise?

Why Does My Blender make a Grinding or Squealing Noise

Besides being so noisy, blenders also make squealing or grinding noises. This is even more irritating than the loud noise blenders usually produce. Whenever you notice your blender making grinding or squealing noises, make sure to get it inspected by a professional as soon as possible. Only a malfunctioning blender is expected to produce much noise.

Such noises are caused whenever the base, motor, coupler, or blades aren’t in proper condition. We have explained the sources of grinding or squealing blender noise in detail below. Let’s go through them one by one.


If the bearings of the blades have become worn or rusty, the blender is expected to make loud, grinding, or squealing noises. Whenever the bearings become rusty or worn-out, the blades can’t spin freely, causing loud noises in the process. In this case, you will notice the blade assemblies falling one by one at the bottom. You must immediately report the issue to a professional and replace the parts with new ones.


Just like the blades, even the motor bearings can become worn out. In this case, too, you might notice the blender producing a squealing or grinding noise. The bearings alone cannot be replaced. Therefore, it’s important to replace the entire motor. If you are willing to do it yourself, go through the steps mentioned below.

  • Unplug the blender from the power source beforehand.
  • Now, remove the pitcher from the base.
  • Turn the base upside down and remove the screws that are holding the plastic bottom cover in place.
  • Take a wrench and unscrew the nut which holds the inside plate.
  • Now, carefully take out the fan and the motor. Detach all wires that are connected to these components.
  • Can you see a yellow wire connecting the circuit board to the motor? This has to be detached. Use a soldering iron for that.
  • Now, place a new motor carefully.
  • Follow the steps you did in reverse and your new motor would be ready to function properly!


Sometimes couplings or couplers fail to function properly, causing a grinding noise. Couplers are available in a variety of materials and shapes. They tend to fail whenever the blades are overloaded with pressure. Don’t know where to find the coupler? They are fitted on top of the blender base. You cannot repair them. It’s better to replace the old ones with new couplers. For that, follow the following steps:

  • Unplug the blender at first.
  • Pry the coupling off the base, by using a screwdriver. Pry it off from different sides.
  • When the couplers are detached, install new ones. Make sure there’s no piece of old couplers stuck.
  • You can twist the new coupler onto a spindle. As you continue to use the blender, the couplers would tighten with time.


If your blender’s base is damaged, expect to hear continuous grinding noise every time you run the blender. If none of the above-mentioned reasons are applicable, the base of the blender is likely to cause the noise. Sometimes the base breaks or cracks. That’s why the pitcher fails to seat properly on the countertop. The container base can become damaged if it’s continually overtightened. The base is however easy to be replaced. Do the following steps to replace a damaged base:

  • Firstly, unplug the blender.
  • Unscrew the pitcher base from the container.
  • Take out the blade assembly.
  • Now bring the new container base.
  • Place the blade assemblies into the new container base. Be careful. Take time to install all the blade components correctly.
  • Place them in the correct order.
  • Now seal the container base back into the jar.

If you see the grinding noise continues even then, chances are you haven’t been able to fit the assemblies properly. Call the professional to get the matter addressed.

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If you are too worried about the issue of noise, you must opt for expensive models of blenders as they come with advanced features that mitigate the noise to a large extent. Therefore the intensity of the noise depends on the quality and type of blender you are buying. There are a variety of quieter models in the market nowadays. Go through them and choose one of your choices.

By now you have understood that blender blades are usually made up of steel which makes such loud noises when set in motion. Again if the blender is very powerful, it’s also expected to produce a lot of noise because the motor is capable of spinning faster, picking up heat, and causing louder noise in the process.

The good news for you is there are several ways in which one can soften the noise coming from a blender. However, you must remember that a blender can never be made absolutely quiet. You can only reduce the blender noise to some extent.

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