DEWALT DW840 Corded Angle Grinder 7 Inch
- Wattage: 1560 watts
- Maximum Rotational Speed: 8000 rpm
- Power Source: Corded Electric
- Material Type: Blend
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
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ASIN: B0002SRK6MModel: DW840Category: Power Grinders
Overview
The DeWalt DW840 is a corded electric angle grinder running on 120 volts with an 8,000 RPM top speed and a 1,560-watt motor. At 12.05 pounds, it is built for sustained, heavy-duty grinding rather than light touch-up work.
The combination of a 1,560-watt motor and 12-pound-plus weight points to a large-format grinder meant for demanding metalworking or fabrication tasks rather than compact detail grinding. Running at 8,000 RPM, it trades top-end speed for torque and stability under load, a common tradeoff in large angle grinders built to handle bigger wheels.
- 1,560-watt corded motor
- 8,000 RPM top speed
- Weighs 12.05 pounds
- Runs on 120 volts
Who it's for
Metalworkers, fabricators, and tradespeople who need a corded, high-power grinder for heavy material removal or cutting over long sessions. Less suited to anyone wanting a lightweight, cordless grinder for occasional light-duty jobs.
Pros and cons
- High 1,560-watt motor power
- Stable weight for heavy-duty grinding
- Heavier at over 12 pounds
- Corded, not portable like battery models
- Lower top speed than compact grinders
Performance notes
The 1,560-watt motor combined with a 12.05-pound body gives this grinder the mass and power to maintain speed under load, which matters most when cutting or grinding thick material where a lighter tool would bog down. At 8,000 RPM it runs slower than compact high-speed grinders, a tradeoff that typically favors control and torque over raw surface speed.
Specifications
| Brand | DeWalt |
|---|---|
| Model | DW840 |
| Dimensions & fit | |
| Item Weight | 12.05 poundshigher than 94% of 107 power grinders |
| Item Dimensions L X W X H | 21.6 × 9.1 × 4.4 inches |
| Capacity & performance | |
| Maximum Rotational Speed | 8000 rpmlower than 90% of 122 power grinders |
| Power & efficiency | |
| Wattage | 1560 wattshigher than 93% of 55 power grinders |
| Power Source | Corded Electric |
| Voltage | 120 voltshigher than 52% of 103 power grinders |
| Horsepower | 3.02 hp |
| Construction & materials | |
| Material Type | Blend |
| Color | Black, Yellow |
| Included components | |
| Unit Count | 1 |
| Included Components | 7 In Wheel / 7 In Type 27 Guard / Side Handle / Hex Key / Inner And Outer Flange / DW840 Grinder |
| Warranty & support | |
| Manufacturer Warranty Description | Manufacturer |
| Other details | |
| Style Name | Classic |
| Item Type Name | Angle Grinder |
Closest rivals on specs
20V Brushless Cordless Angle Grinder Kit 4-1/2 to 5 Inch- Maximum Rotational Speed 8000 vs 9600 rpm (-17%)
- Item Weight 12.05 vs 10.27 pounds (+17%)
Makita GA7021 Angle Grinder 7 Inch- Wattage 1560 vs 1800 watts (-13%)
- Maximum Rotational Speed 8000 vs 6000 rpm (+33%)
- Item Weight 12.05 vs 15.4 pounds (-22%)
Makita 9564CV High-Power Angle Grinder 4-1/2 Inch- Voltage 120 vs 24 volts (+400%)
- Wattage 1560 vs 1400 watts (+11%)
- Maximum Rotational Speed 8000 vs 10500 rpm (-24%)
Frequently asked questions
Is the DeWalt DW840 corded or cordless?
It is corded electric, running on 120 volts.
How much does it weigh?
12.05 pounds.
What is its motor power and top speed?
A 1,560-watt motor with an 8,000 RPM top speed.