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How to choose the best grain mill for brewing

A grain mill is a piece of equipment used in brewing to crush and grind malted grains into a powder, which is then mixed with hot water to extract the sugars and other components necessary for making beer. The process of milling the grains is important in beer brewing because it affects the efficiency of the brewing process and the quality of the final product.

There are several types of grain mills available for use in brewing, including hand-cranked mills, motorized mills, and roller mills. Hand-cranked mills are the simplest and least expensive option, but they require more effort to use and may not produce as consistent a grind as other types of mills. Motorized mills are more convenient and efficient, but they are also more expensive. Roller mills are the most advanced type of grain mill, and they produce a more consistent and uniform grind than other types of mills.

When choosing a grain mill for brewing, factors to consider include the size of the mill, the materials used to make the mill, and the type of grind produced by the mill. A good grain mill can greatly improve the quality and efficiency of the brewing process, and it is an essential piece of equipment for serious homebrewers and professional brewers alike.

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as of March 21, 2023 8:27 pm
as of March 21, 2023 8:27 pm
as of March 21, 2023 8:27 pm
Last updated on March 21, 2023 8:27 pm

Why Own a Grain Mill

Owning a grain mill can be advantageous for several reasons. Here are a few reasons why someone might want to own a grain mill for brewing:

  1. Freshness: One of the main reasons to own a grain mill is the ability to grind your grains fresh, just before brewing. This can have a significant impact on the quality of your beer, as freshly ground grains can contribute more flavor and aroma to the final product. Additionally, freshly ground grains may have a higher sugar content, which can improve the efficiency of your brewing process.
  2. Control: By owning a grain mill, brewers have greater control over the grind size of their grains. This can be especially important for specialty grains, which may require a finer or coarser grind to achieve the desired flavor profile. With a grain mill, brewers can adjust the grind size to their specific needs, ensuring consistent results.
  3. Cost savings: Buying malted grains in bulk and milling them yourself can be a cost-effective way to brew beer, especially for homebrewers who may not have access to commercial brewing equipment. By buying grains in bulk, brewers can save money and have greater control over the ingredients in their beer.
  4. Convenience: Having a grain mill at home can also be more convenient for brewers, as they can grind their grains on demand rather than having to make a separate trip to a brewing supply store or waiting for an online order to arrive.

Overall, owning a grain mill can give brewers greater control over the quality and consistency of their beer, as well as offer cost savings and convenience.

How does grain mill work?

A grain mill is a device used to crush and grind whole grains into smaller pieces, typically for brewing beer or making flour. Here’s how a grain mill works:

  1. Hopper: The grains are poured into the hopper, which is the upper part of the mill that holds the grains.
  2. Rollers or burrs: Inside the mill, there are two or more rollers or burrs that rotate against each other to crush the grains.
  3. Gap setting: The gap between the rollers or burrs can be adjusted to control the fineness of the grind. The tighter the gap, the finer the grind.
  4. Crushed grains: As the grains are fed through the rollers or burrs, they are crushed and broken into smaller pieces.
  5. Collection bin: The crushed grains fall through the rollers or burrs and are collected in a bin or bucket at the bottom of the mill.

Electric grain mills use a motor to power the rollers or burrs, while manual mills require hand-cranking to operate. Some grain mills also have additional features, such as the ability to attach a drill for motorized operation, or a larger hopper for larger batches.

In summary, a grain mill works by crushing and grinding whole grains into smaller pieces, allowing for better extraction of flavors and sugars for brewing beer or making flour for baking.

What kind of grain for brewing beer?

There are several types of grains that are commonly used in brewing beer. These include:

  1. Base grains: Base grains are the main source of fermentable sugars in a beer recipe. Examples of base grains include two-row barley, six-row barley, pilsner malt, and wheat malt.
  2. Specialty grains: Specialty grains are used to add flavor, color, and aroma to the beer. Examples of specialty grains include crystal malt, chocolate malt, roasted barley, and Munich malt.
  3. Adjuncts: Adjuncts are non-grain ingredients that are added to the beer to add flavor, body, or other characteristics. Examples of adjuncts include corn, rice, oats, and rye.

When selecting grains for brewing, it’s important to consider the flavor profile you want to achieve, as well as the specific brewing process you’ll be using. Different grains have different levels of fermentable sugars, protein content, and enzymes, which can impact the brewing process and the final product.

Most homebrew stores offer a wide range of grains, as well as pre-made recipe kits that include all the necessary grains and adjuncts for a specific beer style. It’s also important to store grains properly to maintain their freshness and quality, and to mill them just before use for optimal flavor and aroma extraction.

How to use grain mill for brewing

Using a grain mill for brewing can be a relatively straightforward process. Here are the basic steps:

  1. Set up the mill: Depending on the type of mill you have, you may need to attach a handle or motor, adjust the rollers or burrs, and set the gap between the rollers to the desired width.
  2. Add the grains: Pour the grains into the hopper of the mill. Make sure the hopper is not overfilled, as this can lead to inconsistent grinding.
  3. Turn on the mill: If you have a motorized mill, turn it on and adjust the speed as needed. If you have a hand-cranked mill, start turning the handle.
  4. Collect the crushed grains: As the grains are crushed, they will fall through the rollers and into a collection bin or bucket. Make sure the bin or bucket is positioned to catch the crushed grains.
  5. Repeat as needed: Depending on the amount of grains you are milling, you may need to repeat the process several times to get the desired amount of crushed grains.
  6. Brew: Once you have your crushed grains, you can add them to your brewing vessel and begin the brewing process.

It is important to note that the grind size can affect the brewing process, so it’s essential to experiment with different settings to find the ideal grind size for your recipe. Additionally, it’s recommended to clean the mill after each use to prevent buildup of debris that can affect the performance of the mill.

How to choose the best grain mill for brewing

When choosing a grain mill for brewing, there are several factors to consider. Here are some of the key factors to keep in mind:

  1. Type of mill: There are three main types of grain mills: hand-cranked mills, motorized mills, and roller mills. Hand-cranked mills are the least expensive but require more effort to use. Motorized mills are more convenient and efficient but can be more expensive. Roller mills are the most advanced type of mill, producing a more consistent and uniform grind.
  2. Capacity: Consider how much grain you plan to mill at one time. If you brew in small batches, a smaller capacity mill may be sufficient, but if you brew larger batches or plan to brew frequently, you may want a larger capacity mill.
  3. Grind consistency: The consistency of the grind produced by the mill is important for achieving consistent results in your brewing process. Roller mills tend to produce a more consistent grind than hand-cranked or motorized mills.
  4. Durability: Look for a mill made from durable materials, such as stainless steel or aluminum, that can withstand regular use and last for years.
  5. Price: Consider your budget when choosing a grain mill. Hand-cranked mills tend to be the least expensive, while roller mills can be more expensive.
  6. Reviews: Look for reviews from other brewers to get an idea of the reliability and performance of different grain mills.

Overall, choosing the best grain mill for brewing comes down to balancing factors such as cost, convenience, consistency, and durability to find the option that best meets your brewing needs and budget.

How long does all grain brewing take?

All-grain brewing typically takes around 4-6 hours, depending on the specific recipe and brewing equipment being used. Here is a general breakdown of the all-grain brewing process and the time required for each step:

  1. Mashing: The first step in all-grain brewing is mashing, which involves soaking the crushed grains in hot water to extract their sugars. This step typically takes around 60-90 minutes.
  2. Lautering: After mashing, the liquid (called wort) is separated from the spent grains in a process called lautering. This step can take around 30-60 minutes, depending on the lautering method being used.
  3. Boiling: The wort is then boiled with hops and any other desired ingredients for around 60-90 minutes.
  4. Cooling: After boiling, the wort must be cooled quickly to a temperature that is suitable for yeast fermentation. This can take around 20-30 minutes.
  5. Fermentation: Once the wort has been cooled, yeast is added, and the fermentation process begins. The length of fermentation varies depending on the recipe and desired flavor profile, but it typically takes around 1-2 weeks.
  6. Carbonation and Conditioning: After fermentation is complete, the beer is carbonated either through natural carbonation or force carbonation, and then conditioned in bottles or a keg for at least a week or two.

Overall, all-grain brewing can be a time-consuming process, but it also allows for greater control over the flavor and character of the final product.

Tips for brewing on the grain mill

Here are some tips to help you brew using a grain mill:

  1. Use high-quality grains: The quality of your grains can greatly impact the final product, so make sure to use high-quality grains that are fresh and properly stored.
  2. Set the gap properly: The gap between the rollers or burrs in your mill is crucial for achieving the right grind consistency. Make sure to set the gap properly before starting the milling process.
  3. Mill the grains just before brewing: To get the freshest and most consistent grind, it’s best to mill the grains just before you start the brewing process.
  4. Clean the mill regularly: Grain mills can collect debris and residues that can affect their performance and the flavor of your beer. Clean your mill regularly, especially after each use, to prevent buildup.
  5. Use a consistent grind: To ensure consistent brewing results, use a consistent grind size for your grains. Experiment with different settings to find the ideal grind for your recipe.
  6. Monitor the flow rate: During the lautering process, monitor the flow rate of the wort to make sure it’s not too fast or too slow. Adjust the flow rate as needed to prevent clogging and ensure optimal extraction.
  7. Use a recipe calculator: Use a recipe calculator to help you determine the correct amount of grains to use, based on your desired recipe and batch size.
  8. Take notes: Keep track of the details of your brewing process, including the grain type, grind size, and flow rate. This can help you replicate successful brews and troubleshoot any issues that arise.

By following these tips, you can make the most of your grain mill and brew high-quality beer with consistent results.


Here are some frequently asked questions about choosing the best grain mill for brewing:

The ideal gap setting for a grain mill depends on the type of grains you’re using and your brewing process. Generally, a gap setting of 0.035 to 0.045 inches is recommended for most grains used in brewing.

The construction material of a grain mill is important, as it can impact the durability and performance of the mill. Look for mills made of durable materials such as stainless steel or aluminum to ensure long-term use.

Electric mills are generally faster and more convenient, but manual mills offer more control and precision. Choose the type of mill that best suits your brewing needs and personal preferences.

Yes, you can use a grain mill to grind other types of grains, such as corn or wheat, for various purposes like baking or cooking. However, different grains may require different mill settings to achieve the desired consistency.

As a beginner, look for a grain mill that is easy to use and maintain, has adjustable roller spacing, and can accommodate a range of grain sizes. You may also want to consider a mill with a larger hopper if you’re planning on brewing larger batches in the future.


Choosing the best grain mill for brewing requires considering your brewing needs, budget, and personal preferences. Electric mills are typically faster and more convenient, while manual mills offer more control and precision. When selecting a mill, look for features like adjustable roller spacing, durable construction, and ease of use and maintenance.

Consider the materials used in the construction of the mill and make sure it’s suitable for the size of your brewing operation. Finally, read reviews and seek recommendations from other homebrewers to ensure you’re making an informed decision. Ultimately, the best grain mill for brewing is one that meets your needs and helps you produce high-quality beer.

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