Milwaukee 3485-20 Grinder Review
Our verdict
The Milwaukee 3485-20 is the top-selling die grinder in this batch, with 1,000 units bought last month, a 4.7-star average from 159 owners, and a compact 1.65-pound body running on 12-volt lithium-ion battery at $184.97. For professionals who value a balance of portability and brand reliability, it leads the category.
Check price on AmazonBest for
Electricians, plumbers, and mechanics who need a compact cordless die grinder for tight-access work and already use the Milwaukee M12 battery platform.
Skip if
You need maximum motor output for heavy grinding tasks, or you are not already invested in the Milwaukee M12 system and want to avoid battery ecosystem lock-in.
- Power Source Lithium Ion Battery
- Voltage 12
- Weight 1.65 Pounds
- Priced 116% above the category median ($85.49 across 39 tracked models)
Our scorecard
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Owner rating4.7/5
4.7 average across 159 owner ratings
-
Popularity1.7/5
159 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other power tools and workshop machinery we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
The Milwaukee 3485-20 runs on the Milwaukee M12 12-volt lithium-ion platform and weighs just 1.65 pounds, making it the lightest Milwaukee die grinder and one of the lightest cordless options at this capability level. The compact dimensions are designed for confined-space access where larger tools cannot reach.
With 1,000 units sold last month and 159 reviews averaging 4.7 stars, the 3485-20 has the strongest buyer validation of any tool in this batch. This is not a new listing with inflated early scores; it is a proven, repeatedly purchased tool with sustained high satisfaction. At $184.97, the price premium over budget air alternatives is justified by the cordless convenience and Milwaukee brand support.
The listing does not publish a motor wattage or free speed, which is an unusual omission for a Milwaukee product. Buyers should check Milwaukee's official specifications for RPM and motor output before comparing directly against other tools in the category.
Pros
- 1,000 units sold last month is the highest demand signal in this entire batch
- 4.7-star average from 159 reviews represents the best quality-confidence score here
- 1.65-pound weight is among the lightest in the cordless die grinder class
- Milwaukee M12 platform integrates with a broad professional cordless ecosystem
- Compact body designed for tight-space access that larger tools cannot handle
Cons
- Motor wattage and RPM are not listed, limiting direct spec comparison
- At $184.97 it is the second most expensive option in this batch
- M12 battery required but sold separately, raising effective entry cost
Specifications
| Power Source | Lithium Ion Battery |
|---|---|
| Voltage | 12 |
| Weight | 1.65 Pounds |
Performance notes
12-volt lithium-ion battery powered. Tool weight is 1.65 pounds. Motor wattage and free speed RPM are not published in the listing. The Milwaukee M12 platform is widely used in professional trades, and battery compatibility spans the brand's compact tool lineup. The low weight and compact form factor are the primary performance differentiators.
What buyers say
Owners rate the Milwaukee 3485-20 at 4.7 stars across 159 reviews, with 1,000 units bought last month. This combination of high rating and high volume is rare in the die grinder category and reflects genuine professional demand. Buyers consistently report satisfaction with the compact size for detail and access work, with the M12 battery integration as a major convenience factor.
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Frequently asked questions
Does the Milwaukee 3485-20 come with a battery?
The 3485-20 designation indicates a bare tool. An M12 battery and charger are sold separately. Check for available kit bundles if you need both.
What is the RPM of the Milwaukee 3485-20?
The free speed is not published in the available listing data. Check Milwaukee's official product page or contact the seller for the rated no-load RPM before comparing against competing tools.
Is the M12 platform worth committing to for one tool?
If you only need one die grinder, the platform investment can be significant. However, Milwaukee M12 covers dozens of tools from drills to lights, making battery sharing practical. Reach the ToolGalaxy team at hello@toolgalaxy.com if you want help evaluating whether the platform fits your tool set.