Dremel US40-04 vs. Worx WX439L

We’ll take a look at these two circular saws: the Dremel US40-04 and the Worx WX439L.

Features & Benefits

For more information, read more in our roundup of the best compact circular saws.

Power & Motor

Both products are corded and require 120 V. The US40-04 draws 7.5 amps. The WX439L draws 4.5 amps. In the U.S., standard residential circuits are 120 V, 15 A, which will support either of the saws.

The US40-04 motor produces 13000 rpm and the WX439L motor produces 4100 rpm. Don’t pay too much attention to these numbers, because the manufacturers measure them under no-load conditions, so they don’t have a useful impact on the saw’s real-world capability to handle different material.

The US40-04 has a direct-drive motor. The WX439L has a direct drive motor. Direct-drive motors are usually lighter than other styles, but their side mounting makes the saw a little harder to control.

Blades & Capacity

The US40-04 accepts 4” diameter saw blades. The WX439L takes 4 1/2” diameter blades and has a 3/8” arbor.

The US40-04 can bevel the blade up to 0° and can cut up to 3/4” deep at 90°. The WX439L can bevel up to 45°, will cut up to 1 11/16” at a 90° angle, and is able to cut up to 1 1/8” deep at an angle of 45°.

When beveling the saw, most circular saws will have positive stops at common angles such as 45° and 90°. This ensures you are making precise cuts. Some saws have additional stops at other angles.

Both circular saws have the blade mounted on the left side of the saw. Right-handers sometimes find it easier to see and control blades mounted to the left, while left-handers might find the same true for right-mounted blades.

Pros & Cons

Let’s take a look at some of the pluses and minuses of these products.

For the US40-04:

For the Worx:

Comparison Chart

Here’s a full side-by-side look at these products’ specs. You can view comparisons of the Dremel US40-04 with other products

	Dremel US40-04	Worx WX439L
Brand	Dremel	Worx
Power Type	corded	corded
Power - Voltage	120 V	120 V
Power - Amps	7.5 A	4.5 A
No-load RPM	13000 rpm	4100 rpm
Blade Diameter	4”	4 1/2”
Maximum Bevel	0°	45°
Depth of Cut (at 90°)	3/4”	1 11/16”
Depth of Cut (at 45°)	n/a	1 1/8”
Arbor Size	n/a	3/8”
Dimensions	13” L × 5” H
Weight	4.6 lbs	3.97 lbs
Blade - Side	left	left
Drive Mechanism	direct-drive	direct drive
Stops	n/a
Warranty	2 years
Pros	Optional auxiliary handle for extra control Includes multiple blades for wood, metal, PVC, etc. Can make flush cuts with appropriate blade	Slimmer handle than its predecessor is easier to grip Includes rip fence Dust port for connecting to a shop vacuum
Cons	Can overheat when cutting thick material	Rip fence is tricky to keep accurate when tightening Struggles to cut through full 2x products
	Check Price	Check Price