March 23, 2021

Wen scroll saw 3920 vs 3921 | Which One Should You Get?

Not sure which to get, Wen scroll saw 3920 VS 3921. The Wen scroll saw 3920 and the 3921 are close to each other in terms of features. The Wen 3921 is an improved version of the 3920. However, that does not make it exceptional. Look at the differences in the blade system, size, cost, rip capacity, motor, speed, and accuracy and you will have a balanced evaluation. Below is a review of both, their similarities and differences.

Overview of the Wen scroll saw 3920 159us

The Wen scroll saw 3920 has a unique design. It accepts blades in two directions for great ripping capacity. That process involves a standard and 90-degree blade. The motor 120 Volts is 1.2 Amps and has the capacity of making 400 to 1600 strokes per minute. The speed variance allows you to have full control of the machine. The table has more space and it bevels up to 45 degrees to the left for angled cuts. 

The saw cuts up to 2 inches on thick wood.  It has a 16inch throat depth in the standard position. It comes with a cast iron base that is highly durable. The base makes the machine sturdy. The package also consists of an air pump, flex light, dust port, foot lock clamp, onboard storage and three blades. 

It consists of a blade holder that accepts the pinned and pinless blades as you change the direction of the cut. When you are using the pinned blade, you pop the pinout of the front holder and turn the blade 90 degrees. 

In this case, you are no longer limited to the 16inch throat of the scroll saw. The tension-release switch is easily accessible as it is located on top of the machine.  There is an air pump that traps sawdust from the blade. It maintains a clear line of sight to the activity. 

It has an LED light that keeps the action taking place visible. The light is adjustable and movable as you focus on a particular angle. It has onboard storage that allows you to keep your blades in the same place and accessories.  


  • Affordable
  • Blades are easy to change
  • Lightweight
  • Ease of use
  • No noise


  • The blower does not function well
  • The pinless blade adapter could be better

(See Current Price)

Key Features of the Wen scroll saw 3920

Rip capacity

The rip capacity is amazing. The ability to control speed variance makes it possible to achieve an infinite rip capacity. The speed and power of the saw are excellent. The unique design that accepts two different blades in two directions amounts to that. 

Blade Size

The blade is 5 inches long whether it is pinned or pinless. The variable-speed tool can withstand the pressure that comes with both blades. 

Max cutting depth

The table has a large area to work on. It features a 16inch depth when you are cutting large wood pieces. The table bevels up to 45 degrees to the left.

Amp motor

The scroll saw has a 120 Volts and 1.2 Amps motor. It is so powerful that it makes accurate cuts and it supports speed variance.

Safety Features

It has a foot-lock clamp that avoids the wood pieces to shake and slide in unwanted directions during the cutting process. Your fingers are protected from the wood and the blade.

Rotations per minute

The scroll saw produces 400 to 1600 strokes per minute. It is adjustable so that you maintain a certain speed. The speed is easy to control. All you have to do is turn the knob. 


The function of the air pump is to remove sawdust from the blade. That increases its performance. You have a clear line of sight to the activity you are running. 

LED light

The machine comes with a light that has the shape of a worm. It increases visibility in low-light conditions.

Overview of the Wen scroll saw 3921

It is a 16inch unique scroll saw that allows blades to operate in two directions. It has a speed variance that ranges from 400 to 1600 strokes per minute. The 16 x 11-inch table bevels up to 45 degrees to the left for angled cuts. It cuts deep down to 2 inches for thick wood material.

 It comes with a thumbscrew blade adapter that makes changing blades easy. The cast iron base keeps the vibration off the environment. The package also includes an air pump, a flex light, a dust port, a foot lock clamp, storage and additional blades. The table gives you more space to work. You have no problem if you are working on large workpieces. 

You use a variety of blades that are pinned or pinless blades. The speed variance is easy to control with just a turn of a knob. It comes with a flexible worm-like light that is adjustable, and you shift it if you want it to focus on the material. 


  • Ease of use
  • Blades operate in two ways
  • Speed variance
  • No noise
  • Spacious table


  • The blade attachment takes more time if you use more spiral blades
  • Not affordable

(See The Current Price)

Key Features of the Wen scroll saw 3921

Rip capacity

The scroll saw has a capacity of 2inches vertical and 16inches in the throat. The tool has the rip capacity of working on large pieces of wood depending on the type of blade you are using at a specific angle.


You choose the type of blade you want to use between the pinned or pinless use in the standard direction. A pinned blade is swapped on the 90 degrees as you allow cuts to move across the table. That defies the standard way of moving back and forth. It increases the cutting capacity. The blade holder holds any blade. 


The table is spacious and you can work on large wood pieces. It is 16 x 11inches. You can place your tools, not in use onto the table. The table bevels up to 45 degrees for an angled cut. 

Air pump

The function of the pump is to clear sawdust from your work area. That gives you a clear line of vision as you cut your wood piece. It works hand in glove with the 1-1/2 inch dust port. The dust port makes sure that the environment is clean. 

Rotations per minute

The motor has the power to produce 550-1600 strokes per minute. That is called speed variance. Speed depends on the type of blade and the thickness of the material you are working on.


  • Both tools have a 16inch throat size that accepts both pinned and pinless blades. The blades are in 90 degrees and standard position.
  • They both have an adjustable air pump.
  • They have an LED light.
  • Both tools have a foot lock clamp which is a safety feature.
  • They both come with onboard storage. 


  • The Wen scroll saw 3921 has a tool-less blade, whereas the 3920 has additional accessories for the blade replacement or swap process.
  • The Wen scroll saw 3920  has the capacity of making 400 to 1600 strokes per minute, whereas the Wen scroll saw 3921 produces 550 to 1650 strokes per minute.


Both products are under 200. They are more affordable than the 3922. That might be due to a few differences that separate the two scroll saws. They are almost the same.


The Wen scroll saw 3921 is an updated version of the 3920. That is why it has additional features that the predecessor does not have. It produces more strokes than the 3920 and it comes with blades that do not require tools when you think of swapping or replacing the old one. In terms of cost, they have the same price range. You might be tempted to go for the 3921 that has more features than the 3920.

David D. Hughes

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