What is the Difference between a 165Mm And 185Mm Circular Saw?

Last Updated On July 28, 2023

A 165mm circular saw has a smaller blade diameter compared to a 185mm circular saw. This size difference affects the cutting depth and efficiency of the saws.

Circular saws with a 165mm blade are suitable for light and medium-duty cutting tasks, offering a smaller cutting depth but increased maneuverability. On the other hand, circular saws with a 185mm blade are better suited for heavy-duty cutting tasks, providing a greater cutting depth and faster cutting speeds.

The choice between a 165mm and 185mm circular saw depends on the nature of the cutting project and the desired level of cutting efficiency.

What is the Difference between a 165Mm And 185Mm Circular Saw

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Understanding Circular Saw Sizes

Explanation Of The Measurement Standards For Circular Saws

Circular saws are an essential tool for cutting various materials, including wood, metal, and plastic. When it comes to purchasing a circular saw, understanding the measurement standards is crucial. Let’s delve into the key points that explain the measurement standards for circular saws.

Circular saws are typically identified by the diameter of their blades. This measurement determines the depth of the cut that the saw can achieve.

The two most common sizes for circular saw blades are 165mm and 185mm.

The measurement in millimeters (mm) refers to the diameter of the blade. A 165mm circular saw has a blade diameter of 165mm, whereas a 185mm circular saw has a blade diameter of 185mm.

The blade diameter affects the maximum cutting depth of the circular saw. As a general rule, the cutting depth is approximately equal to the blade diameter divided by two.

For example, a 165mm circular saw can typically cut materials with a maximum depth of around 82.5mm (165mm ÷ 2), while a 185mm circular saw can cut materials with a maximum depth of around 92.5mm (185mm ÷ 2).

Overview Of The Differences Between 165Mm And 185Mm Saws

Now that we have a grasp of the measurement standards, let’s take a closer look at the differences between 165mm and 185mm circular saws.

Blade size:

A 165mm circular saw features a blade with a diameter of 165mm.

On the other hand, a 185mm circular saw has a blade with a diameter of 185mm.

Cutting depth:

As previously mentioned, the cutting depth of a circular saw is approximately half the blade diameter.

Therefore, a 165mm circular saw can achieve a maximum cutting depth of around 82.5mm, while a 185mm circular saw can achieve a maximum cutting depth of around 92.5mm.


The larger blade diameter of a 185mm circular saw allows it to handle larger materials more efficiently compared to a 165mm circular saw.

While a 165mm saw is suitable for most diy projects and smaller cuts, a 185mm saw is better suited for professional applications and larger-scale projects.


As a general rule, smaller blade sizes result in a more compact and lightweight circular saw. Therefore, a 165mm circular saw is typically more portable than a 185mm circular saw.

The choice between a 165mm and 185mm circular saw depends on the specific requirements of your projects. Consider factors such as cutting depth, versatility, and portability to determine which size is best suited for your needs. Ultimately, both saw sizes have their advantages and can effectively get the job done — it’s a matter of selecting the right tool for the task at hand.

Comparison Of 165Mm And 185Mm Circular Saws

Explanation Of The Key Differences In Blade Size

When it comes to circular saws, one of the primary differences you’ll come across is the blade size. The two most common blade sizes for circular saws are 165mm and 185mm. Although they may seem similar, these differing blade sizes have distinct characteristics that make them suitable for various applications.

Let’s delve into the key differences between the two:

165mm circular saw:

This blade size is smaller compared to the 185mm variant, making it more compact and lightweight.

It is commonly used for precision cutting tasks that require finesse, such as detailed woodworking projects.

Due to its smaller diameter, the 165mm blade is capable of achieving higher rotational speeds, resulting in smoother cuts.

This blade size is often preferred for cutting thinner materials, as its smaller teeth prevent excessive tear-out.

The 165mm circular saw is a popular choice for diy enthusiasts and those working on smaller projects.

185mm circular saw:

With a larger blade size, the 185mm circular saw offers increased cutting depth and capacity.

This blade size is typically utilized in professional settings or larger construction projects that require cutting through thicker materials.

Due to its larger diameter, the 185mm blade can handle more demanding tasks and make quicker work of larger pieces.

The increased surface area of the blade allows for enhanced stability and reduced vibrations during cutting.

The 185mm circular saw is beneficial when cutting materials like hardwood, plywood, and thick boards.

Impact Of Blade Size On Cutting Capacity And Versatility

The size of the circular saw blade plays a vital role in determining the cutting capacity and versatility of the tool. Here’s how the blade size can impact these factors:

Cutting capacity:

The larger the blade size, the deeper the cut it can make. A 185mm circular saw can achieve a greater cutting depth compared to a 165mm saw.

When working with thicker materials, such as beams or solid wood, a larger blade size allows for smoother and more efficient cuts.

The increased cutting capacity of a 185mm circular saw reduces the need for multiple passes, saving time and effort.


While both blade sizes can accomplish a wide range of cutting tasks, their suitability may vary depending on the application.

The 165mm circular saw offers greater maneuverability and precision, making it ideal for intricate cuts and precise woodworking.

On the other hand, the 185mm circular saw provides more versatility when it comes to cutting through thicker materials and handling larger projects.

Consider the specific requirements of your project to determine which blade size would be more suitable for your needs.

Remember, the choice between a 165mm and 185mm circular saw ultimately depends on the type of project you are undertaking and the materials you will be cutting. Assessing the specific requirements of your task will help you make an informed decision and ensure optimal results.

Performance And Cutting Depth

When it comes to circular saws, the size and capabilities can make a big difference in how they perform and what materials they can handle. In this section, we will compare the cutting depth capabilities of 165mm and 185mm circular saws, and analyze the advantages and limitations of each size.

Comparison Of Cutting Depth Capabilities For Different Materials


165mm circular saw:

Cutting depth of up to 55mm.

Suitable for most woodworking tasks, including cutting through standard 2×4 lumber.

Ideal for diy projects and small to medium-sized woodworking jobs.

185mm circular saw:

Cutting depth of up to 65mm.

Can easily handle cutting through thicker pieces of wood, such as hardwood or plywood.

Ideal for professional carpenters and contractors working on larger projects.


165mm circular saw:

Limited cutting depth of around 20mm when it comes to metal.

Suitable for light-duty metal cutting tasks, such as thin-gauge aluminum or sheet metal.

Not recommended for heavy-duty metal cutting.

185mm circular saw:

Cutting depth of up to 35mm for metal.

Capable of tackling heavier metals, such as steel or iron.

Ideal for metal fabricators and contractors working with thicker metal materials.

Other materials:

165mm circular saw:

Can also be used to cut other materials like plastic or laminate.

The cutting depth will vary depending on the specific material.

185mm circular saw:

Similar to the 165mm saw, the cutting depth for other materials will vary.

This size is generally more versatile and can handle a wider range of materials.

Analysis Of The Advantages And Limitations Of Each Size

165mm circular saw:


Lightweight and easier to maneuver.

Cost-effective option for diy enthusiasts and occasional users.

Sufficient cutting depth for most woodworking tasks.


Limited cutting depth for metal materials.

May struggle with thicker or denser wood.

185mm circular saw:


Increased cutting depth allows for more versatility and handling of thicker materials.

Suitable for heavy-duty cutting tasks.

Ideal for professionals who require consistent and precise cuts.


Heavier and bulkier compared to the 165mm saw.

Higher cost compared to the smaller size.

The choice between a 165mm and 185mm circular saw depends on the nature of the work and materials to be cut. 165mm saws are more fitting for general woodworking and lighter tasks, while 185mm saws are better suited for professionals and tasks that involve thicker materials.

Consider your specific needs and preferences before deciding on the right circular saw for your projects.

Power And Speed

With technological advancements in the field of woodworking, circular saws have become increasingly popular due to their efficiency and precision. When choosing a circular saw, one of the critical factors to consider is the blade size. Among the various blade sizes available, the most commonly used options are the 165mm and 185mm circular saw blades.

In this section, we will discuss the difference between these two blade sizes in terms of power and speed. So let’s dive in and explore their characteristics!

Discussion Of The Relationship Between Blade Size And Overall Power

  • The blade size of a circular saw directly affects its overall power and cutting capabilities.
  • A larger blade size generally indicates a more powerful motor, which allows the saw to handle tougher materials and perform more demanding tasks.
  • The power of a circular saw is crucial in determining the depth of cut and the ease with which it can glide through different materials.
  • A 185mm circular saw is generally more powerful than a 165mm one, making it suitable for heavy-duty cutting applications.

Now, let’s move on to the next subheading to compare the cutting speeds of these two blade sizes.

Comparison Of Cutting Speeds For Different Blade Sizes

  • The cutting speed of a circular saw is influenced by various factors, including the size of the blade.
  • A larger blade size can cover a wider cutting area, resulting in a faster cutting speed compared to a smaller blade.
  • Due to the increased circumference, a 185mm circular saw blade will cut more material with each rotation, allowing for quicker and more efficient cuts.
  • On the other hand, a 165mm circular saw may have a slightly slower cutting speed, but it offers greater maneuverability and control.

To summarize, the differences between a 165mm and 185mm circular saw mainly lie in their power and cutting speed. While a larger blade size offers more power and faster cutting speeds, a smaller blade size provides better maneuverability. When selecting the right circular saw for your needs, consider the type of projects you undertake and prioritize either power or versatility.

Portability And Maneuverability

Examination Of The Weight And Size Differences Between 165mm And 185mm Saws

When it comes to circular saws, one of the key factors to consider is their portability and maneuverability. The size and weight of a saw can greatly impact its ease of use in different scenarios. In this section, we will examine the differences between 165mm and 185mm circular saws in terms of weight and size, and how these factors affect their usability.

Weight comparison:

165mm saw: These saws are generally lighter, weighing around 4 to 6 pounds on average.

185mm saw: On the other hand, 185mm saws tend to be slightly heavier, ranging from 6 to 9 pounds.

Size comparison:

165mm saw: These saws have a smaller blade diameter, which means they are more compact in size. The blade measures approximately 6.5 inches in diameter.

185mm saw: In contrast, 185mm saws have a larger blade diameter of around 7.25 inches, making them slightly bulkier compared to the 165mm saws.

The weight and size differences between 165mm and 185mm circular saws can significantly impact their portability and maneuverability in various situations.

Ease of use in different scenarios:

165mm saw: Due to their lighter weight and smaller size, 165mm saws are often preferred for tasks that require enhanced maneuverability. They are ideal for jobs that require cutting in tight spaces or overhead tasks.

185mm saw: While the 185mm saws may be slightly heavier and larger, they compensate for this with their ability to make deeper cuts. These saws are generally more suited for heavy-duty applications that demand cutting through thicker materials.

Choosing between a 165mm and 185mm circular saw ultimately depends on the specific requirements of your projects. Consider these factors when deciding which saw is the right choice for you:

Factors to consider:

Project requirements: Assess the type of projects you will be working on and determine if you need a saw with enhanced maneuverability or one that can handle more extensive cutting tasks.

User comfort: Consider your own strength and physical capabilities. If you will be using the saw for extended periods, a lighter and more compact option like the 165mm saw may be more comfortable to handle.

Budget: Keep in mind that the size and specifications of a circular saw can affect its price. Compare the costs of different models and consider what provides the best value for your needs.

The weight and size differences between 165mm and 185mm circular saws directly impact their portability and maneuverability. Understanding these distinctions and evaluating your specific project requirements will help you select the right saw for your needs.

Practical Applications

A circular saw is an essential tool for many woodworking and construction projects. When it comes to choosing the right circular saw, the blade size plays a crucial role in determining the tool’s practical applications. In this section, we will explore the difference between a 165mm and 185mm circular saw and discuss the various situations where the choice of blade size matters.

Examples Of Typical Projects Where The Choice Of Blade Size Matters:

Deck building: When constructing a deck, the blade size of the circular saw can determine the depth of the cuts required for different materials like lumber or composite decking boards. A larger blade size, such as 185mm, allows for deeper cuts, making it suitable for thicker materials.

Framing: Framing projects often involve cutting through thick lumber or engineered wood products. A larger blade size can tackle such tasks with ease, providing efficiency and precision in making accurate and uniform cuts.

Cabinet making: Cabinet making requires precise cutting of plywood or other sheet materials. A smaller blade size, like the 165mm, can be beneficial for intricate cuts and fine woodworking, providing greater control and maneuverability.

Trim work: Installing trim requires clean and precise cuts on smaller sections like moldings and baseboards. A smaller blade size is often preferred for its accuracy and ease of handling.

Considerations For Different Types Of Cuts And Materials:

  • Depth of cut: The blade size determines the maximum depth of cut the circular saw can achieve. A larger blade size, such as 185mm, allows for deeper cuts, making it suitable for thicker materials. On the other hand, a smaller blade size, like 165mm, is ideal for shallower cuts or thinner materials.
  • Type of material: The choice of blade size also depends on the type of material you are working with. Larger blade size is suitable for dense materials like hardwood or thick metals, where a greater cutting capacity is required. Conversely, a smaller blade size is better suited for softer materials like plywood or plastic.
  • Speed and maneuverability: A smaller blade size generally spins faster, allowing for smoother and more precise cuts. This makes it a preferred choice for tasks that require finesse and control. Conversely, a larger blade size provides more power and cutting capacity, making it ideal for heavy-duty applications.
  • Tool weight and portability: It’s important to consider the weight and portability of the circular saw when choosing the blade size. A smaller blade size usually results in a lighter saw, making it easier to carry and maneuver, especially for overhead work or when working in tight spaces.

Remember, the choice between a 165mm and 185mm circular saw ultimately depends on the specific requirements of your project. By considering the type of cuts, materials, and desired outcomes, you can select the right blade size that best suits your needs.

Factors To Consider When Choosing A Circular Saw

When it comes to choosing the right circular saw for your projects, there are several important factors to consider. Here, we will discuss two key factors that can greatly impact your decision: blade availability and price.

Blade Availability

Availability and variety of blades are crucial considerations when selecting a circular saw. Here are some points to keep in mind:

  • Different blade sizes: Circular saws typically come in two common blade sizes – 165mm and 185mm. Knowing the size of the blades available for each saw can help determine which one suits your needs.
  • Cutting capabilities: Consider the type of projects you’ll be working on. Some blades are designed for specific materials such as wood, metal, or masonry. Ensure the circular saw you choose has a wide range of compatible blades to accommodate your various cutting needs.
  • Easy access to blades: Check the availability of blades in your local hardware stores or online. It’s crucial to have easy access to blades whenever a replacement or a different kind is required for a specific task.
  • Compatibility with other saws: If you already own other saws, such as a miter or table saw, it may be beneficial to choose a circular saw that shares the same blade size for convenience and interchangeability.


Price is always an important aspect to consider when making any purchase. Here are some points relating to price:

  • Budget: Determine your budget range as it will play a significant role in your decision-making process. Circular saws come in a wide range of prices, and it’s essential to find one that fits within your budget without compromising on quality.
  • Features vs. Cost: Compare the features offered by different circular saw models and their corresponding prices. Consider whether the additional features justify the higher cost, or if a more basic model would suffice for your needs.
  • Durability: Keep in mind that higher-priced circular saws are often built with more durable materials, which can impact their longevity. Consider the quality you require and how often the saw will be utilized.
  • Warranty and customer support: Look into the warranty provided by the manufacturer. A longer warranty period indicates the company’s confidence in the product’s quality. Additionally, research the available customer support options in case you encounter any issues with the saw.

Discussion Of Other Factors To Consider, Such As Blade Availability And Price

In addition to blade availability and price, there are several other factors to consider when choosing a circular saw. These factors can help ensure that you make an informed decision based on your individual needs:

Power source: Circular saws are available in both corded and cordless options. Consider your access to power outlets and the portability required for your projects.

Ergonomics: Look for a circular saw with comfortable grips and a well-balanced design to minimize fatigue during extended use.

Safety features: Check for safety features such as blade guards, electric brakes, and safety locks to ensure safe operation.

Brand reputation: Research the reputation of different brands to determine their reliability and customer satisfaction ratings.

Reviews and recommendations: Read reviews from other users to gain insights into the performance and quality of specific circular saw models.

Accessories and extras: Consider any additional accessories or features that may come with the saw, such as laser guides or dust collection systems.

By considering these factors and weighing their importance based on your specific requirements, you can make a well-informed decision when choosing between a 165mm and 185mm circular saw. Remember, it’s crucial to prioritize your needs and find a circular saw that offers the best combination of features, blade availability, and price within your budget.

Frequently Asked Questions

  • What Is The Benefit Of Using A 165Mm Circular Saw Instead Of A 185Mm?

    A 165mm circular saw is lighter and easier to maneuver, making it ideal for precision cutting tasks.

  • Can A 165Mm Circular Saw Cut Through Thicker Materials Like A 185Mm Saw?

    While a 165mm circular saw can handle most cutting tasks, it may struggle with thicker materials compared to a 185mm saw.

  • Is A 185Mm Circular Saw More Powerful Than A 165Mm Saw?

    A 185mm circular saw typically has a larger motor, allowing it to generate more power and handle tougher cutting jobs.


To sum it up, the difference between a 165mm and 185mm circular saw lies in the blade diameter and cutting capacity. While the 165mm saw is smaller and more suited for light-duty projects or cutting thinner materials, the 185mm saw is larger and can handle heavier tasks, making it ideal for cutting thicker materials or performing more demanding jobs.

Understanding the distinctions between these two sizes is crucial, as it allows you to choose the most appropriate tool for your specific cutting needs. Remember to consider the depth and width of the cuts you’ll be making, as well as the materials you’ll be working with.

By selecting the right circular saw size, you can ensure efficient and accurate cuts, saving you time and effort in your woodworking or construction projects.

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