Rockwell RK3440K vs. Worx WX439L

We’ll take a look at these two circular saws: the Rockwell RK3440K and the Worx WX439L.

Features & Benefits

You can read more in our roundup of the best compact circular saws.

Power & Motor

Both products are corded and run on 120 V. The RK3440K draws 4 amps. The WX439L draws 4.5 amps. Standard U.S. residential circuits are 120 V, 15 A, which will support either of the saws.

The RK3440K has a motor that spins at 3500 rpm and the WX439L has a motor that spins at 4100 rpm. You shouldn’t get too caught up in the RPM numbers, since the manufacturers test them under ideal conditions, and they don’t have a meaningful correlation with the saw’s real-world ability to handle various types of material.

The RK3440K has a direct motor. The WX439L has a direct drive motor.

Blades & Capacity

The RK3440K accepts 3 3/8” diameter blades and has a 19/32” arbor. The WX439L takes 4 1/2” diameter saw blades and has a 3/8” arbor.

The RK3440K can bevel the blade up to 0° and can cut up to 1 1/16” at a 90° angle. The WX439L can bevel its blade up to 45°, can cut up to 1 11/16” deep at a 90° angle, and can cut up to 1 1/8” at a 45° angle.

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 on the left side of the unit. 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 Rockwell:

For the WX439L:

Comparison Chart

Below is a full side-by-side look at these products’ specs. You can view comparisons of the Rockwell RK3440K with other products

	Rockwell RK3440K	Worx WX439L
Brand	Rockwell	Worx
Power Type	corded	corded
Power - Voltage	120 V	120 V
Power - Amps	4 A	4.5 A
No-load RPM	3500 rpm	4100 rpm
Blade Diameter	3 3/8”	4 1/2”
Maximum Bevel	0°	45°
Depth of Cut (at 90°)	1 1/16”	1 11/16”
Depth of Cut (at 45°)	n/a	1 1/8”
Arbor Size	19/32”	3/8”
Weight	4 lbs	3.97 lbs
Blade - Side	left	left
Drive Mechanism	direct	direct drive
Stops	n/a
Pros	Very lightweight Laser guide for accurately following cut lines	Slimmer handle than its predecessor is easier to grip Includes rip fence Dust port for connecting to a shop vacuum
Cons	Safety mechanism can be confusing, requires pushing plate down onto work surface	Rip fence is tricky to keep accurate when tightening Struggles to cut through full 2x products
	Check Price	Check Price