CRAFTSMAN CMCG400B Grinder Review
Our verdict
The CRAFTSMAN CMCG400B is a dependable 20V cordless angle grinder that earns 4.7 stars from 2,900 verified owners and delivers 9000 RPM at a budget-friendly $59 price point.
Check price on AmazonBest for
DIYers and hobbyists on the CRAFTSMAN V20 battery platform who need an affordable cordless angle grinder for occasional grinding, cutting, and surface prep.
Skip if
Professionals doing sustained heavy metalwork all day, or buyers who need a battery and charger included in the box.
- Power Source Battery Powered
- Voltage 20 Volts
- Speed 9000 RPM
- Motor 20000 Milliwatts
- Weight 2.59 Kilograms
- Priced 40% below the category median ($98.50 across 92 tracked models)
Our scorecard
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Owner rating4.7/5
4.7 average across 2,900 owner ratings
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Popularity4.6/5
2,900 owner reviews, more 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 CRAFTSMAN CMCG400B is a tool-only 20V battery-powered angle grinder rated at 9000 RPM. At $59 it sits at the accessible end of the cordless grinder market, making it a practical entry point for homeowners and DIY enthusiasts who want to cut metal, grind welds, or remove rust without dragging a cord around a jobsite.
Running on the CRAFTSMAN V20 platform, owners who already own other V20 tools can put this grinder to work immediately without extra battery cost. The 9000 RPM no-load speed is competitive with other 20V grinders in this price tier. The tool weighs 2.59 kilograms, which is moderate for a cordless angle grinder.
With 2,900 owner reviews and 600 units bought last month, demand for the CMCG400B is consistently strong. The sustained 4.7-star rating across that volume of feedback points to a product that holds up reliably for the tasks casual and light-trade users face most often.
Pros
- 4.7-star rating sustained across 2,900 owner reviews
- 9000 RPM no-load speed handles grinding, cutting, and wire-brushing tasks
- Integrates with the CRAFTSMAN V20 cordless battery ecosystem
- $59 is one of the lower price points for a cordless angle grinder in this category
Cons
- Tool only, no battery or charger included, which adds to the effective cost for new CRAFTSMAN users
- 2.59 kg weight can cause fatigue on extended overhead or vertical work
- 20V platform has a power ceiling compared to higher-voltage cordless options for heavy-duty tasks
Specifications
| Power Source | Battery Powered |
|---|---|
| Voltage | 20 Volts |
| Speed | 9000 RPM |
| Motor | 20000 Milliwatts |
| Weight | 2.59 Kilograms |
Performance notes
Battery-powered via the CRAFTSMAN 20V V20 platform. Listed no-load speed is 9000 RPM, suited for 4.5-inch disc applications including grinding, cutting disc work, and wire brushing on metal and masonry. Tool weight is 2.59 kilograms. Motor power is not clearly published in the available listing data.
What buyers say
Owners frequently highlight the CMCG400B for its value relative to its price and how well it fits into the V20 ecosystem. The most common criticism is that the tool ships without a battery, which catches some buyers off guard. Reviewers generally find it well-matched to light and moderate tasks but note its limits emerge sooner on demanding continuous-use work.
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Frequently asked questions
Does the CRAFTSMAN CMCG400B come with a battery?
No. The CMCG400B is sold as a tool-only product. A compatible CRAFTSMAN V20 battery and charger are required and sold separately.
What grinding disc size does the CMCG400B use?
The published listing specs do not specify a disc diameter directly. Based on its 20V cordless category placement, it is designed for standard 4.5-inch angle grinder discs, but confirm with the manufacturer listing before purchasing accessories.
Have more questions about the CRAFTSMAN CMCG400B?
Reach the ToolGalaxy research team at hello@toolgalaxy.com and we will do our best to help.