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FLEX 24V Brushless Cordless 6-1/2-Inch In-Line vs RIDGID 18V Cordless 6 1/2 in. Circular Saw

Updated July 2026 — FLEX 24V Brushless Cordless 6-1/2-Inch In-Line wins on runtime and power, RIDGID 18V Cordless 6 1/2 in. Circular Saw wins on price and weight.

The FLEX 24V Brushless Circular Saw offers superior power and runtime, making it ideal for heavy-duty tasks, while the RIDGID 18V Circular Saw provides excellent value for general use.

Why FLEX 24V Brushless Cordless 6-1/2-Inch In-Line is better

Power

FLEX has a 24V battery providing 20% more power.

Runtime

FLEX can make up to 430 cuts in 2x4 lumber.

Design

FLEX features an innovative in-line design for better visibility.

Why RIDGID 18V Cordless 6 1/2 in. Circular Saw is better

Price

RIDGID is priced at $87.89, about 50% cheaper.

Weight

RIDGID is lightweight and easy to handle.

Compatibility

RIDGID works with all RIDGID 18V batteries.

Overall score

FLEX 24V Brushless Cordless 6-1/2-Inch In-Line
85
RIDGID 18V Cordless 6 1/2 in. Circular Saw
70

Specifications

SpecFLEX 24V Brushless Cordless 6-1/2-Inch In-LineRIDGID 18V Cordless 6 1/2 in. Circular Saw
Max RPMN/A3,700
Bevel CapacityN/A50°
Blade BrakeNoYes
Battery Type24V Lithium18V Lithium
Cut Depth2-9/16"N/A

Dimension comparison

FLEX 24V Brushless Cordless 6-1/2-Inch In-LineRIDGID 18V Cordless 6 1/2 in. Circular Saw

Overview of the FLEX 24V Brushless Circular Saw

The FLEX 24V Brushless Cordless 6-1/2-Inch In-Line Circular Saw is designed for users seeking advanced features and high performance. Priced at $177.66, it boasts a powerful 24V lithium battery system that offers 20% more power than standard models. This saw stands out for its in-line design, which enhances balance and visibility during cuts.

The FLEX saw is equipped with an intelligent sensor-free brushless motor, which allows for efficient and powerful performance. With a maximum cutting capacity of 2-9/16 inches, it can tackle 3x lumber in a single pass, making it a great tool for both professional and DIY users. Its exceptional runtime allows for up to 430 cuts in 2x4 lumber with a 5.0Ah battery, although the battery and charger are sold separately.

Overview of the RIDGID 18V Circular Saw

The RIDGID 18V Cordless 6-1/2 in. Circular Saw is a budget-friendly option at $87.89, making it about 50% cheaper than the FLEX model. Despite its lower price, the RIDGID saw delivers impressive performance, with a maximum speed of up to 3,700 RPM and a 50° bevel capacity, allowing for versatile cutting angles.

This saw features an electronic blade brake for enhanced safety, stopping the blade quickly when necessary. Built with a heavy-duty aluminum base, it ensures durability while remaining lightweight. The RIDGID saw also includes an LED light for improved visibility during low-light conditions and is compatible with all RIDGID 18V batteries, adding to its appeal for existing RIDGID users.

Performance Comparison

In terms of performance, the FLEX 24V Brushless Circular Saw offers superior power with its 24V lithium battery compared to the RIDGID's 18V system. This difference translates to 20% more power, making the FLEX better suited for heavier-duty tasks. The in-line design of the FLEX also improves visibility and balance, which can lead to more accurate cuts.

On the other hand, the RIDGID Circular Saw provides a respectable maximum speed of 3,700 RPM, enabling efficient cutting through various materials. While the RIDGID lacks the advanced motor technology of the FLEX, it still offers reliable performance for everyday use. The choice between the two may ultimately depend on the user's specific cutting needs and frequency of use.

Design and Usability

The FLEX 24V Circular Saw features an innovative in-line design that enhances user control and visibility, especially during intricate cuts. Its ergonomic build allows for comfortable handling, making it suitable for prolonged use. The integrated LED light further adds to its usability by illuminating the cutting area.

Conversely, the RIDGID Circular Saw is designed with practicality in mind, featuring a heavy-duty aluminum base that ensures stability during cuts. It is user-friendly with its lightweight design and electronic blade brake for added safety. The compatibility with existing RIDGID 18V batteries is an advantage for users who already own RIDGID tools, facilitating seamless integration into their toolkit.

Runtime and Battery Life

When it comes to runtime, the FLEX Circular Saw excels, with the capability to make up to 430 cuts in 2x4 lumber using a 5.0Ah battery. This impressive performance is a significant advantage for professionals or avid DIYers who require extended use without frequent recharging.

In contrast, the RIDGID Circular Saw does not specify its cut capacity, but its compatibility with all RIDGID 18V batteries means that users can leverage various battery sizes depending on their needs. This flexibility allows for longer work sessions by utilizing higher capacity batteries, although the runtime may vary based on the specific battery used.

Safety Features

Safety is a crucial consideration in any power tool, and both the FLEX and RIDGID Circular Saws incorporate features to enhance user safety. The FLEX model employs a sensor-free brushless motor, which reduces friction and improves efficiency, contributing to safer operation.

The RIDGID Circular Saw includes an electronic blade brake that halts the blade quickly, minimizing the risk of accidents. This feature is particularly beneficial in emergency situations. Additionally, both saws offer built-in LED lights to improve visibility, thereby enhancing safety during use in dimly lit conditions.

Price Point Comparison

The FLEX 24V Brushless Circular Saw is priced at $177.66, while the RIDGID 18V Circular Saw comes in at a significantly lower price of $87.89, making it about 50% cheaper. This substantial price difference may influence budget-conscious consumers, especially those who do not require advanced features.

While the FLEX offers greater power and performance, the RIDGID provides solid value for those who need a reliable circular saw for everyday tasks without breaking the bank. Ultimately, the decision may hinge on whether the user prioritizes performance or affordability.

Which should you buy?

Choosing between the FLEX 24V Brushless Circular Saw and the RIDGID 18V Circular Saw largely depends on your specific needs and budget. If you require a high-performance tool for heavy-duty tasks with superior power and runtime, the FLEX is the clear choice. However, if you're looking for an affordable, reliable saw for general use, the RIDGID offers excellent value without sacrificing essential features. Consider your typical projects and how often you'll use the saw to determine the best fit for your toolkit.