MILWAUKEE

Milwaukee 2889-20 Grinder

Grinder
1800 watts
1 pound
18 volts

4.7/ 5 on Amazon286Amazon ratings100+bought last month4.1ProductDome score

Better rated than 66%
More reviewed than 55%

Medium confidenceLast refreshed Aug 4, 2026Amazon data + ProductDome analysis · methodology

Best forYou already own Milwaukee M18 batteries and need a bare grinder

A well rated grinder within Milwaukee's M18 cordless platform, best suited to someone already invested in that battery system.

As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.

ProductDome scorecard

How it ranks among the 150 grinders we track

4.1/ 5ProductDome scoreMedium confidence

Owner satisfaction · 56% of scorecategory median 4.6★4.7

4.7★ across 286 Amazon ratings, Bayesian-smoothed toward the category average.

Evidence strength · 17% of scorecategory median 256 ratings3.1

286 Amazon ratings, weighted on a log scale so huge counts don't drown everything.

Buyer demand · 11% of score2.7

100+ bought on Amazon last month.

Data quality · 11% of score3.8

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

Milwaukee lists the 2889-20 as an 18 volt grinder rated for 8500 RPM. Its model number ends in 20, and combined with the 16 ounce listed weight, that points to a bare tool sold without battery or charger.

Milwaukee's M18 lineup typically sells the bare tool separately from the battery pack, and the light 16 ounce figure here supports that reading. Buyers who do not already own an M18 battery will need one to run this grinder.

18V, 8500 RPM
16 oz bare tool weight
Milwaukee M18 series (2889-20)
4.7 stars, 286 reviews

Who it's for

Fits existing Milwaukee M18 battery owners who need an additional grinder head for the platform. Not a fit for a first time buyer expecting a battery and charger in the box.

Strengths and trade-offs

Drawn from this product's published specifications.

What stands out

8500 RPM cutting speed
Light 16 ounce bare tool weight
4.7 stars across 286 reviews
Bought by around 100 shoppers in the past month

What to check first

Sold as a bare tool, no battery or charger included
Motor power spec is not clearly listed

Performance notes

At 8500 RPM on 18 volts, this grinder is built for cordless cutting and grinding tasks. The listed 16 ounce weight reflects the bare tool only, without the battery pack that adds most of the working weight.

Specifications

Brand	MILWAUKEE
Model	2889-20
Motor Power	1800 watts
Power Source	Corded electric, Gas, Battery
Item Weight	1 pound
Voltage	18 volts
Speed	8500 rpm

How it compares

This product against the closest alternatives we track in grinders.

Product	Amazon rating	Ratings	ProductDome score
Milwaukee 2889-20 GrinderThis product	4.7 / 5	286	4.1 / 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

Frequently asked

Questions about the MILWAUKEE 2889-20

Common buyer questions answered straight from the product spec data - no fluff, no "it depends".

Does the Milwaukee 2889-20 come with a battery?

No, the trailing 20 in the model number and the listed specs point to a bare tool sold without battery or charger.

What voltage is the Milwaukee 2889-20 grinder?

It runs on Milwaukee's 18 volt M18 system.

How fast does the Milwaukee 2889-20 spin?

Up to 8500 RPM.