Bosch CS10 vs. Rockwell RK3440K

Let’s take a look at these two circular saws: the Bosch CS10 and the Rockwell RK3440K.

Features & Benefits

You can read more in our roundup of the best compact circular saws and the best full-size circular saws.

Power & Motor

Both saws are corded and run on 120 V. The CS10 draws 15 amps. The RK3440K draws 4 amps. Standard U.S. residential circuits are 120 V, 15 A, which will support either of the products.

The CS10 motor spins at 5600 rpm and the RK3440K motor spins at 3500 rpm. But don’t get too caught up in these numbers, since the manufacturers measure them under ideal conditions, and they don’t have a direct impact on the saw’s real-world ability to handle different material.

The CS10 has a direct-drive motor. The RK3440K has a direct 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 CS10 takes 7 1/4” diameter blades and has a 5/8” arbor. The RK3440K accepts 3 3/8” diameter blades and has a 19/32” arbor. Most 8-to-10” blades have a 5/8” arbor hole, so this size of arbor maximizes blade compatibility.

The CS10 can bevel up to 56°, can cut up to 2 7/16” deep at a 90° angle, and can cut up to 1 7/8” at a 45° angle. The RK3440K can bevel its blade up to 0° and can cut up to 1 1/16” deep at a 90° 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.

The Bosch has stops at 22.5° and 45°.

The Bosch has the blade on the right side of the unit. The Rockwell has 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 Bosch:

For the Rockwell:

Comparison Chart

Below is a full side-by-side comparison of these products’ specs. You can view comparisons of the Bosch CS10 with other products

	Bosch CS10	Rockwell RK3440K
Brand	Bosch	Rockwell
Power Type	corded	corded
Power - Voltage	120 V	120 V
Power - Amps	15 A	4 A
No-load RPM	5600 rpm	3500 rpm
Blade Diameter	7 1/4”	3 3/8”
Maximum Bevel	56°	0°
Depth of Cut (at 90°)	2 7/16”	1 1/16”
Depth of Cut (at 45°)	1 7/8”	n/a
Arbor Size	5/8”	19/32”
Dimensions	18” L × 10” H
Weight	10.2 lbs	4 lbs
Blade - Side	right	left
Drive Mechanism	direct-drive	direct
Stops	22.5° and 45°	n/a
Warranty	1 year
Pros	Not as heavy as some competitors Quality blade included in package Rafter hook for hanging when not in use	Very lightweight Laser guide for accurately following cut lines
Cons	Plastic adjustment levers could break with rough use	Safety mechanism can be confusing, requires pushing plate down onto work surface
	Check Price	Check Price