Milwaukee 2785-20 M18 FUEL Large Angle Grinder
- Wattage: 800 watts
- Maximum Rotational Speed: 6600 rpm
- Power Source: Battery
- Material Type: Metal
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
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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ASIN: B0839N1VMWModel: 2785-20Category: Power Grinders
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.
- 18 volt M18 cordless platform
- 6600 RPM, 800 watt motor
- 20 x 12 x 4 inches
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.
Pros and cons
- 18 volt cordless, no cord needed on site
- 6600 RPM suits standard grinding and cutoff discs
- 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 |
| Dimensions & fit | |
| Item Dimensions L X W X H | 20 × 12 × 4 inches |
| Capacity & performance | |
| Maximum Rotational Speed | 6600 rpmlower than 93% of 122 power grinders |
| Power & efficiency | |
| Wattage | 800 watts |
| Power Source | Battery |
| Voltage | 18 voltslower than 77% of 103 power grinders |
| Horsepower | 1.07 hp |
| Construction & materials | |
| Material Type | Metal |
| Color | Grey,red,black |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Style Name | Angled |
Closest rivals on specs
DEWALT DCG405B 20V MAX XR Slide Switch Angle Grinder- Voltage 18 vs 20 volts (-10%)
Cordless Angle Grinder for Milwaukee M18 Battery 4-1/2 Inch- Maximum Rotational Speed 6600 vs 8000 rpm (-17%)
DEWALT DCG412P2 20V MAX Angle Grinder Kit 4-1/2 Inch- Voltage 18 vs 20 volts (-10%)
- Maximum Rotational Speed 6600 vs 8000 rpm (-17%)
Frequently asked questions
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.