Dewalt DC390B Circular Saw Review

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In Brief: Dewalt DC390B Circular Saw Review

Dewalt DC390B is an 18V cordless Crcular Saw with a lightweight. It has a rubber-grip handle that ensures long usage and convenience. The motor delivers a 3700RPM on its 6-1/2″ carbide tipped blade. It is suitable for cutting through diverse lumbers and materials. It is a considerable option for woodworkers and DIY enthusiasts.

Dewalt is the manufacturer of several high-quality power tools, including circular saws. They are one of the consistent manufacturers of efficient circular saws with amazing designs.

Dewalt DC390B is one of the most impressive products from Dewalt. It is an effective cutting tool for a wide variety of materials. It has reliable specifications and ensured durability.

Key Specifications of the Dewalt DC390B

DEWALT DC390B 6-1/2-Inch 18-Volt Cordless Circular Saw (Tool Only)

Dewalt DC390B is arguably the lightest circular saw you would find around weighing only about 6.3lbs. It is a cordless circular saw with high strength magnesium shoe that aids its durability.

It has a fan-cooled motor that delivers a no-load speed of 3700RPM. At 90⁰, the product is capable of making 2-1/4″ deep cuts and 1-5/8″ at 45⁰.

The power rating together with its sharp 6-1/2″ carbide blade is capable of making fast rip and cross cuts on several materials including woods.

The cooling system has replaceable brushes to maintain maximum power and long usage.

The product does not come with battery and charger; however, it is compatible with DC9096 18-volt XRP battery pack and DW9117 15-minute charger.

The video below shows how to use Dewalt DC390B :


Take al look at Dewalt DC390B Circular Saw long list of specs here :

Speed/Power rating (RPM)3700
Voltage (Volts)18
Arbor Size (inches)5/8”
Blade (inches)6-1/2"
Power Tool TypeCordless
Bevel range (degrees)0-50⁰
Depth of cut at 90 degrees (inches)2-1/4”
Depth of cut at 45 degrees (inches)
Weight (lbs)6.3

Unique Features

Dewalt DC390B has a unique design and amazing specifications that make it easily distinguishable from other circular saws.


Dewalt DC390B is amazingly light. It is arguably the lightest cordless circular saw around weighing only 6.3lbs. This feature makes it easy to handle and use.

The product is cordless; it operates on a battery power source. Therefore, you can easily pack and move it around without worrying about the power source.

Convenience and Long Use

The use of Dewalt DC390B is quite convenient. The motor is fan-cooled; therefore, you can safely use it over an extended period.

The product also has rubber-grip handles to dampen vibration and ease the stress of handling; thus, permitting its continuous use.


Design, Cutting, and Safety

The design of Dewalt DC390B is one of its biggest selling points. Its cutting capacity and safety features are also notable features that buyers look out for.


The design of the Dewalt DC390B is compact and portable. The lightweight circular saw has a high strength magnesium shoe and upper guard to enhance its durability. The product dimension is 8.88” x 15.94” x 10.50”.

The handle of the product has a rubber grip to dampen vibration and ease working stress. The product is cordless, and it is compatible with DC9096 18-volt XRP battery pack and DW9117 15-minute charger.


The size of the product does not limit its cutting ability. The 6-1/2″ blade is capable of making a 2-1/4″ deep cut at 90⁰ and 1-5/8″ deep cut at 45⁰. The carbide tipped blade can give a 2x cutting capacity at 90⁰ and 45⁰.

The fan-cool motor of the product delivers a no-load speed of 3700RPM thus, it is capable of cutting through different materials, including construction lumbers, composite materials, and plywood.


The safety features of Dewalt DC390B are one of the reasons why it is suitable for beginners and amateurs.

The size of the product also makes it easy to handle, and the blade guard will prevent accidental contact with the tool’s blade.


Ease of Maintenance, Repair, Warranty

Ease of maintenance

Dewalt DC390B is compact, and it has a simple design. The maintenance procedures for Dewalt DC390B include :

  • Blow out dirt and dust from all air vents at least once in a week.
  • You don’t need to use lubricants on this product because it has a self-lubricating ball and roller.
  • Inspect the blade and all other vital parts of the product before use.


Repairs and replacement of Dewalt DC390B are handled by Dewalt factory centers to ensure safety and reliability.

It is not advisable to let unprofessional technicians carry out repairs on your product. However, the battery and charger are not serviceable.


The warranty details of Dewalt DC390B include :

  • 3-year money-back guarantee.
  • 1-year free service offers.
  • 90-days money-back guarantee.

It is best to register your Dewalt product online at to have access to the service and warranty offers for the product.

You can also get more details on the warranty service on the company’s official website or call 1-800-433-9258.

Price of Dewalt DC390B

The price of the Dewalt DC390B is just like its weight. As it is one of the lightest weight products, it is also arguably the cheapest. It is suitable for all budget ranges, including low budget buyers.


Who Should Buy DewaltDC390B ?

Dewalt DC390B is a great bargain for buyers with low budget who need a portable and efficient circular saw. The product is easy to handle therefore, it is suitable for all variety of users, including beginners and amateurs.

The cordless feature and lightweight of the product make it suitable for contractors with multiple jobsites. Its ability to cut through almost any type of material makes it a good option for large and medium-scale applications.

Why We Like It

Dewalt DC390B is a suitable consideration for beginner and professional woodworkers that want a cordless, lightweight and portable device at low cost without sacrificing its effective performance.

It is useful in making smooth and fast cuts on diverse materials. It is portable, lightweight and easy to handle.


Last update on 2024-06-14 / Affiliate links / Images from Amazon Product Advertising API

About Ryan Henderson

Ryan has more than ten years of experience of writing on power tools - use, reviews, and more. During his free time, he loves cooking and spending time with his dog.

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