what is the difference between the 3921 and 3922?

These two units are almost identical. The only differences are that the 3921 includes a flexible work light and a blade storage compartment on the side, while 3922 features a special side panel that folds open for easy clean up and blade changes. Also, the 3921 uses the two-direction adapter system for holding blades (better for pinned blades), while the 3922 uses a standard blade holding system (better for pinless blades).

Did anyone find out if a miter gauge or some type of guard can be used to make straight cuts?

If your material to be cut allows enough room on the table portion to attach a straight edge with clamps, it will work just fine. Make sure that your straight edge is aligned with the saw blade so you don't end up breaking blades. Lastly, the thicker the material, use blades that have fewer teeth per inch or TPI. I am using a 7 TPI blade to cut anything over 1/2 inch, so far, it is working but slow cutting.

I am new to scroll saws so have to ask. Is it worth the $40 difference in price for the 3921 over the 3920 and why.

I can't speak for the 3921, but the 3920 is okay at best, it's actually nice if you use pinned end blades. However if you plan on using pinnless blades I would suggest a diffirent saw. Hope this helps

Have a new 3922 scroll saw. Upper and lower pinless blade holders wont pinch together to hold the blades. Wen are you going to back up your saw ?

You have to make sure they are the correct length and it does take some work getting them in properly. It too two people to load mine.

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WEN 3923 16-Inch Variable Speed Scroll Saw with Easy-Access Blade Changes and Work Light, Black

Product ID: 332752515

Details

Blade material
High Speed
Brand
WEN
Colour
Black
Power source
Corded
Surface recommendation
Wood

💡Adjustable work light

⚙️550-1600 SPM variable speed

🛠️Tool-free blade changes

Description

🪚 Cut Above the Rest — Precision Meets Power in Every Stroke!

CUT AT ANY ANGLE - Spacious 16.25x10 inch table bevels up to 45° for flawless angled cuts that elevate your projects.
ROCK SOLID STABILITY - Cast iron base minimizes vibration for smooth, professional-grade scroll sawing every time.
EFFORTLESS BLADE SWAPS - Unique side panel and thumb screw adapter enable quick, tool-free blade changes—stay in the creative flow.
PRECISION AT YOUR PACE - Variable speed dial from 550 to 1600 strokes per minute lets you master every cut with ease.
STAY FOCUSED STAY CLEAN - Built-in air pump and 1.5-inch dust port keep your workspace clear and your vision sharp.

The WEN 3923 is a 16-inch variable speed scroll saw designed for professional-quality woodworking. It features a powerful 550-1600 SPM motor, a spacious beveling table up to 45 degrees, and a cast iron base for stability. Tool-free blade changes and an adjustable work light enhance usability, while an air pump and dust port maintain a clean workspace. Ideal for cutting wood up to 2 inches thick, it combines precision, convenience, and durability backed by a two-year warranty.

Specifications

ASIN	B09XWV7FJT
ASIN	B09XWV7FJT
Blade Length	16 Inches
Blade Material	High Speed Steel
Blade Shape	Rectangular
Brand Name	WEN
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (5,349)
Customer reviews	4.5 4.5 out of 5 stars (5,349)
Cutting Angle	45 Degrees
Date First Available	28 September 2022
Global Trade Identification Number	00044459939238
Handle Material	Plastic
Included Components	WEN 3923 16-Inch Variable Speed Scroll Saw with Easy-Access Blade Changes and Work Light
Item Dimensions L x W x H	67L x 12.7W x 37.5H centimeters
Item Type Name	16-Inch Variable Speed Scroll Saw
Item Weight	11.5 Kilograms
Item model number	3923
Manufacturer	WEN
Manufacturer	WEN
Manufacturer Part Number	3923
Model Number	3923
Number of Items	1
Number of Teeth	60
Other Special Features of the Product	Brushless
Power Source	Corded Electric
Product Dimensions	67.01 x 12.7 x 37.47 cm; 11.5 kg
Specification Met	CE
Surface Recommendation	Wood
UPC	044459939238
Warranty Type	Two-Year Limited Warranty

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