Circular saw DeWalt DCS391N — 18V, 3700 RPM, 165 mm bore, cutting depth 90° 55 mm, weight 3.2 kg

The DeWALT DCS391N Circular Saw is a cordless 18V power tool designed for accurate and portable wood cutting. It features a fan-cooled PM58 motor with replaceable brushes delivering up to 3700 rpm, a cast magnesium base for stable, repeatable cuts, and accepts a 165 mm ultra-thin kerf carbide-tipped blade with a 16.5 mm bore. The saw provides a maximum cutting depth of 55 mm at 90° and combines compact dimensions and a 3.2 kg weight for improved handling on job sites.

Advantages

This circular saw uses XR Lithium Ion technology for efficient cordless performance and faster applications. The ergonomic handle with rubber overmold and improved rubber grip increases user comfort during prolonged use. Keyless bevel and depth adjustments with clear scales, a spindle lock for quick blade changes, and an intelligent trigger offer precise control. Safety is enhanced by a lock-off switch and an electronic motor brake, while the durable design—including a cast magnesium base—ensures accurate, repeatable cuts.

Suitable for

• Straight and angled crosscuts in timber and sheet materials
• On-site carpentry and general woodwork where portability is required
• Tasks requiring quick blade changes and adjustable cutting depth

Key specifications

• Model: DeWALT DCS391N (MPN: DCS391N-XJ, EAN: 5035048356210)
• Power: 18V (battery supplied separately)
• Motor: PM58 fan-cooled with replaceable brushes, up to 3700 rpm
• Blade diameter / bore: 165 mm / 16.5 mm
• Maximum depth of cut: 55 mm at 90°
• Weight: 3.2 kg
• Dimensions (depth x height): 360 mm x 240 mm

How to use

Fit a compatible 165 mm carbide-tipped blade and secure it using the spindle lock for safe tightening. Adjust the cutting depth and bevel angle using the keyless controls and read the scale to set the desired values. Hold the saw by the ergonomic handle with a firm grip; use the intelligent trigger to control speed and engage the electronic brake to stop the blade after cutting. Always install a charged 18V XR Lithium Ion battery before operation (battery sold separately) and check that the lock-off switch is disengaged before starting.

Recommendations

For best results, use the saw with a sharp 24-tooth carbide-tipped blade for fast, smooth cuts and efficient runtime. Wear appropriate personal protective equipment, secure the workpiece, and follow manufacturer guidance for battery charging and maintenance to ensure consistent performance and tool longevity.