WEN 3921 Scroll Saw Review — Using This 16-Inch Variable Speed Unit (2024)

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You know how frustrating it can be to work with a scroll saw that doesn’t make the cut. Blades that break, machines that wobble, and inconsistent performance can all be your problem if you don’t do thorough research. 

Here, I will share my WEN 3921 Scroll Saw review to see if this best-selling product does deliver quality performance. 

What I Like

What I Don't Like

Design and Build

The WEN 3921 16-Inch Two-Direction Variable Speed Scroll Saw is built with a sturdy and durable design that makes it ideal for woodworking projects. 

Its heavy-duty cast iron base provides stability and support during use, while the rubber feet help to prevent slipping and vibration. 

The saw’s arm and table are both made of durable metal, with the table featuring a beveling capability for angled cuts. The table can also be tilted up to 45 degrees to the left or right for greater versatility.

WEN 3921 Scroll Saw Features

Overview of Specifications

Throat Size

The WEN 3921 Scroll Saw has a 16-inch throat size, which means it can cut through materials up to 2 inches thick. The throat size is the distance between the blade and the rear of the saw’s arm and determines the maximum width of the material that can be cut. 

The larger the throat size, the bigger the material that can be cut. A larger throat size translates to a greater cutting capacity, and I found the 16-inch throat size to be really versatile for larger projects.


It offers many adjustments that allow you to customize its performance to your needs. 

One of the main adjustments is the variable speed control, which allows you to adjust the speed of the blade from 400 to 1600 strokes per minute. This matches the blade speed to the material being cut, ensuring the cut is clean and precise.

The saw’s table is also adjustable and can be beveled up to 45 degrees to the left for angled cuts. This provides flexibility for cutting materials at different angles to create intricate designs and shapes.

The saw’s blade adapter features a thumb screw mechanism for tool-free blade changes, making it easy to switch blades without requiring any additional tools. This saves time and effort during the cutting process to make quick adjustments as needed.

Variable Speeds

The WEN 3921 Scroll Saw has a variable speed control that adjusts the blade speed from 400 to 1600 strokes per minute. Having variable speed control is a crucial feature for a scroll saw, as different materials require different blade speeds for optimal performance. 

For example, softer woods like pine require slower blade speeds, while harder woods like oak require faster blade speeds. By adjusting the blade speed, you can achieve cleaner and more precise cuts.

The saw’s variable speed control is easy to use, with a simple knob that adjusts the blade speed to your desired level. 

Cutting Performance

I have to say, the WEN 3921 Scroll Saw delivers on performance. Its two-directional blade design opens up endless possibilities, known as infinite ripping capacity. Coupled with the variable speed control, you can fine-tune the tool for whatever material you’re cutting. In my time using it, I’ve found that this feature set really leads to cleaner, more precise cuts, regardless of the project.

Ease of Use

What I love about this saw is that it’s just so user-friendly. It’s ideal for both beginner and experienced woodworkers. Its variable speed control, easy-to-use blade adapter, spacious table, and air pump for clearing sawdust all contribute to its user-friendliness. 

Moreover, it is equipped with a built-in work light and a dust port, enhancing both visibility and cleanliness in the workspace. These features contribute to more accurate and precise cuts while reducing the chances of accidents occurring.

Dust Blower

This saw comes equipped with a dust blower that helps to keep the cutting line clear of sawdust and debris.

The dust blower is powered by an air pump that is located underneath the saw’s table. When turned on, the pump blows a steady stream of air onto the cutting line, helping to clear away sawdust and debris as the saw blade moves back and forth.

This feature is particularly useful when working with materials that produce a lot of sawdust or when making intricate cuts that require a clear view of the cutting line. 

By keeping the cutting line clear, the dust blower helps to ensure that users can make accurate and precise cuts, reducing the risk of mistakes and accidents.

Extra Features

This WEN 3921 Scroll Saw with Work Light has many extra features that improve its functionality and user-friendliness. 

One thing that stood out for me was its cast iron base. This makes the saw more precise and easier to control, improving the quality of the cuts and reducing the risk of accidents.

I also found that the saw also comes with a foot lock clamp, which helps to hold the material being cut securely in place, reducing the risk of slippage and making more accurate cuts. The clamp [1] is easy to use, with a simple foot pedal that activates the clamp.

Other extra features of the WEN 3921 saw include onboard storage for the included blades, a dust port for easy clean-up, and a flexible work light that can be adjusted to any angle.

Blade Change

This saw has an easy-to-use blade-changing mechanism, like the Wen LL2156. It features a thumb screw blade adapter that allows for quick and easy blade changes without any additional tools. 

This saves time and reduces the risk of injury associated with handling sharp blades. To change the blade, you simply loosen the thumb screw, remove the old blade, insert the new one, and tighten the thumb screw. 

This user-friendly feature enhances the saw’s functionality and makes it an excellent tool for woodworkers of all skill levels.

Value for Money

The WEN 3921 Scroll Saw is a great tool for woodworkers who want high quality at an affordable price. 

Its powerful motor and large table can handle thick wood and angled cuts, and its versatile features, such as two-directional blade operation and variable speed control, make it perfect for various scroll saw projects

Additionally, its ease of use is improved by features such as the blade adapter, dust port, air pump, and foot lock clamp. The saw also comes with a 2-year warranty for added peace of mind. Overall, the WEN 3921 offers excellent value for money.

WEN 3921 vs 3920 vs 3922

The WEN 3921, 3920, and 3922 are three models of scroll saws produced by the same manufacturer, WEN. 

While all three models are similar in design and functionality, there are some key differences between them that are worth noting.

Key Differences

WEN 3921, 3920, and 3922 are three scroll saw models with some key differences. 

The WEN 3920 and 3921 offers the same variable speed control from 400 to 1600 strokes per minute, while the 3922 has a variable speed from 550 to 1600 strokes per minute.

This variable speed control allows you to adjust the speed of the blade to suit the specific needs of your project.

The WEN 3921 and 3922 both feature a dust port that can be connected to a vacuum to help keep the work area clean, while the 3920 does not have a dust port. 

This is an important feature for those who value a clean workspace and want to minimize the amount of dust produced during use.

The WEN 3921 and 3922 feature a thumb screw blade adapter for tool-free blade changes, while the 3920 does not have this feature. This makes it easier to change the blade and adjust to the specific needs of your project.

In addition, it should be noted that the 3921 employs a blade-holding mechanism that allows for two-directional use, making it ideal for pinned blades, whereas the 3922 utilizes a standard blade-holding system that is more suitable for pinless blades.

Finally, the WEN 3921 and 3920 come with a built-in work light, while the 3922 does not have this feature. The work light is particularly useful when working on intricate or detailed projects, providing additional visibility to help you achieve accurate cuts.

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Review Conclusion: WEN 3921 Scroll Saw

The same with most WEN 3921 Scroll Saw reviews, this unit proves to be a reliable and flexible tool that caters to both woodworking enthusiasts and professionals. 

With this saw’s two-directional blade operation, variable speed control, and spacious table size, it can handle intricate cuts on various materials. This saw is a great investment for those seeking to improve their woodworking skills at a reasonable price point.

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Robert Johnson is a passionate furniture maker & carpenter, sought after for his knowledge on the craft.
You’ve probably seen his down-to-earth wisdom in USA Today, Bobvila, Family Handyman, and The Spruce, where he has shared commentary and guidance on various woodworking topics.

Robert is the brain behind Sawinery, where he aims to share tips, tricks, and a passion for all things carpentry.

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