The DW840 is a corded 7-in. medium angle grinder with a 13 Amp motor delivering 8,000 RPM and 2,250 UWO for aggressive material removal on metal and masonry. The Dust Ejection System redirects debris away from internal components to extend motor life. It ships with a 7-in. Type 27 guard, side handle, hex key, and inner and outer flanges. Compatible with 7-in. Type 27 wheels. Carries DEWALT's 3-year limited tool warranty.
What disc size does the DW840 use?
The DW840 uses 7-in. (180mm) Type 27 grinding wheels. The larger 7-in. format increases surface coverage compared to 4.5-in. or 5-in. grinders, making it suitable for wider welds and larger stock removal tasks.
How many amps does the DW840 draw?
The DW840 uses a 13 Amp motor delivering 8,000 RPM and 2,250 UWO. This output supports sustained heavy grinding on steel, pipe, and masonry without power drop-off.
What is the Dust Ejection System on the DW840?
The Dust Ejection System actively redirects grinding dust and debris away from the motor and internal components. This helps prevent premature wear and extends the service life of the grinder in dusty environments.
Is the DW840 suitable for continuous heavy use?
Yes. As a corded grinder, the DW840 has no battery runtime limits. The 13 Amp motor and 2,250 UWO output are designed for professional-grade continuous grinding and cutting tasks.
What is included with the DW840?
The DW840 ships with a 7-in. grinding wheel, a 7-in. Type 27 guard, a side handle, a hex key, and inner and outer flanges. Everything needed for immediate use is included in the box.
How does the DW840 compare to the DW831?
The DW840 uses a larger 7-in. wheel versus the DW831's 5-in. wheel, and draws 13 Amp versus 12 Amp. The DW840 covers more surface area per pass and delivers higher torque output, making it better suited for large-scale metal fabrication, concrete prep, and heavy weld grinding.
# DEWALT® 7-in. (180mm) Medium Angle Grinder **Model:** `DW840` **Brand:** DEWALT **Category:** Angle Grinder > The DW840 is a corded 7-in. medium angle grinder with a 13 Amp motor delivering 8,000 RPM and 2,250 UWO for aggressive material removal on metal and masonry. The Dust Ejection System redirects debris away from internal components to extend motor life. It ships with a 7-in. Type 27 guard, side handle, hex key, and inner and outer flanges. Compatible with 7-in. Type 27 wheels. Carries DEWALT's 3-year limited tool warranty. ## Specifications | Attribute | Value | |---|---| | Product Type | Angle Grinder | | Cordless / Corded | Corded | | Power Source | AC | | Height (in.) | 4.2 | | Length (in.) | 21.6 | | Weight (lbs) | 12.05 | | Width (in.) | 9.1 | | Country of Origin | China | | Barcode (UPC) | 028875084000 | | Disc Diameter In | 7 | | No-Load Speed (RPM) | 8,000 | | Amps | 13 | | Uwo | 2,250 | | Warranty | 3-year limited (tool) | ## What's Included - (1) DW840 7-in. Medium Angle Grinder - (1) 7-in. Wheel - (1) 7-in. Type 27 Guard - (1) Side Handle - (1) Hex Key - (1) Inner and Outer Flange Source: https://www.jaspecs.com/dewalt/angle-grinder/dw840-dewalt-7-180mm-medium-angle-grinder/