DEWALT DWE4120N Grinder
- Grinder
- 1140 watts
- Corded electric
- 5 pounds
- Better rated than 66%
- More reviewed than 68%
A corded DEWALT angle grinder with a high RPM motor and a strong review record, built for sustained grinding and cutting work.
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How it ranks among the 150 grinders we track
4.7★ across 427 Amazon ratings, Bayesian-smoothed toward the category average.
427 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
50+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 150 grinders we track - how the scorecard works · full grinders data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The DEWALT DWE4120N is a corded electric angle grinder running on 120 volts, with a 1140 watt motor spinning up to 12000 RPM. It weighs 5 pounds bare. Rated 4.7 stars across 427 reviews.
A 1140 watt motor and 12000 RPM no load speed put this in the small angle grinder class, the kind used for cutting, grinding, and surface prep with 4 to 5 inch discs. Being corded means constant power without battery runtime limits, at the cost of needing an outlet nearby. At 5 pounds, it is light enough for one handed overhead or awkward angle work.
- 4.7 star average
- 427 reviews
- 12000 RPM no-load speed
- 1140 watt motor, 120V corded
Who it's for
Metalworkers, welders, and DIYers doing grinding, cutting, or deburring who want continuous power without battery swaps. Less suited to cordless only job sites or anyone prioritizing portability over runtime.
Strengths and trade-offs
Drawn from this product's published specifications.
- High 12000 RPM motor speed
- Consistent corded power, no battery runtime limit
- Light at 5 pounds bare
- 4.7 star average across 427 reviews
- Requires an outlet or extension cord
- Not usable on cordless-only job sites
Performance notes
The 1140 watt motor driving 12000 RPM gives this grinder enough speed to move through cutting and grinding discs efficiently, which is the main driver of how fast it clears material. Running on a 120 volt cord means output does not fade as a battery drains, a real advantage during long grinding sessions. At 5 pounds bare, fatigue during overhead or extended use should be lower than with heavier grinders.
Specifications
| Brand | DeWalt |
|---|---|
| Model | DWE4120N |
| Motor Power | 1140 watts |
| Power Source | Corded electric |
| Item Weight | 5 pounds |
| Voltage | 120 volts |
| Speed | 12000 rpm |
Other DeWalt grinders
How it compares
This product against the closest alternatives we track in grinders.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| DEWALT DWE4120N GrinderThis product | 4.7 / 5 | 427 | 4.1 / 5 |
| Milwaukee 2880-20 GrinderMILWAUKEE | 4.8 / 5 | 2,400 | 4.5 / 5 |
| AVID MW590 GrinderAVID | 4.5 / 5 | 6,100 | 4.4 / 5 |
| Makita 9557PBX1 GrinderMAKITA | 4.8 / 5 | 3,960 | 4.4 / 5 |
| CRAFTSMAN CMCG400B GrinderCraftsman | 4.7 / 5 | 2,900 | 4.4 / 5 |
Similar grinders from other brands
Questions about the DeWalt DWE4120N
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is the DWE4120N corded or cordless?
It is corded electric, running on 120 volts.
How fast does the DWE4120N spin?
It has a no load speed of 12000 RPM.
How much does the DWE4120N weigh?
5 pounds as a bare tool, per the listing.