Milwaukee 2785-20 Grinder
- Grinder
- 800 watts
- Battery
- 18 volts
- Better rated than 85%
A well reviewed 18 volt Milwaukee grinder running 6600 RPM at 800 watts, sold as a bare tool best suited to buyers already on the M18 battery platform.
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How it ranks among the 150 grinders we track
4.8★ across 193 Amazon ratings, Bayesian-smoothed toward the category average.
193 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand 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: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Milwaukee 2785-20 is an 18 volt cordless angle grinder from Milwaukee's battery powered lineup, running at 6600 RPM with an 800 watt motor. Sold as the bare tool per the -20 suffix, it is built for grinding, cutting and surface prep without a cord.
Milwaukee's M18 platform is one of the more established cordless systems on the market, and the 2785-20 fits into it as a grinder meant to cut and grind metal, weld joints and masonry without tethering the user to an outlet. At 6600 RPM it spins fast enough for standard grinding wheels and cutoff discs, and the 800 watt motor is respectable for a battery powered tool in this class. A 4.8 star average across 193 ratings is a strong showing, and the 2785-20 designation typically means the tool ships without a battery or charger.
- 18 volt M18 cordless platform
- 6600 RPM, 800 watt motor
- 20 x 12 x 4 inches
- 4.8 star average across 193 ratings
Who it's for
Fits tradespeople and DIYers already invested in Milwaukee's M18 battery system who want a grinder to add to the lineup. Less of a fit for someone starting from scratch without M18 batteries, since the -20 suffix points to a bare tool sold without one.
Strengths and trade-offs
Drawn from this product's published specifications.
- 18 volt cordless, no cord needed on site
- 6600 RPM suits standard grinding and cutoff discs
- 4.8 star average across 193 ratings
- Bare tool, battery and charger not included
- Runtime depends on the M18 battery paired with it
Performance notes
The 800 watt motor spinning at 6600 RPM covers typical grinding and cutting disc speeds, enough for metal fabrication, weld cleanup and masonry cutting. Being cordless trades outright runtime for the ability to work anywhere, and since this is the bare tool version, actual runtime depends on whatever M18 battery the buyer pairs it with.
Specifications
| Brand | MILWAUKEE |
|---|---|
| Model | 2785-20 |
| Motor Power | 800 watts |
| Power Source | Battery |
| Voltage | 18 volts |
| Dimensions | 20 × 12 × 4 inches |
| Speed | 6600 rpm |
Other MILWAUKEE grinders
How it compares
This product against the closest alternatives we track in grinders.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Milwaukee 2785-20 GrinderThis product | 4.8 / 5 | 193 | 3.8 / 5 |
| DEWALT DCG413B GrinderDeWalt | 4.8 / 5 | 9,600 | 4.6 / 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 |
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Questions about the MILWAUKEE 2785-20
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Milwaukee 2785-20 include a battery?
No. The -20 model number indicates a bare tool, so battery and charger are sold separately.
What is the top speed of the 2785-20?
It runs at 6600 RPM with an 800 watt motor.
What battery platform does this grinder use?
It runs on Milwaukee's 18 volt M18 cordless system.