CRAFTSMAN V20 CMCG400B Cordless Angle Grinder 4-1/2 Inch
- Wattage: 20000 Milliwatts
- Maximum Rotational Speed: 9000 rpm
- Power Source: Battery
- Voltage: 20 volts
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A cordless 20V angle grinder with a 4.7 rating and solid monthly demand, a reasonable pick for a Craftsman battery owner tackling grinding or cutting tasks around the shop.
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ASIN: B07MFD6N3LModel: CMCG400BCategory: Power Grinders
Overview
The Craftsman CMCG400B is a cordless angle grinder on Craftsman's 20V battery platform, rated at 9000 RPM with a listed item weight of 2.59 kilograms, about 5.7 pounds.
Nine thousand RPM sits in the typical range for a compact angle grinder used on metal grinding, cutting and deburring. The RPM figure and 20 volt battery spec line up cleanly with a standard cordless angle grinder, even though the category label reads as a general Specialties adjacent listing.
- 20V battery powered
- 9000 RPM rated speed
- 2.59 kilogram item weight
Who it's for
Suits someone already on Craftsman's 20V battery system who wants a cordless grinder for metalwork, deburring or light fabrication. Less suited to heavy continuous grinding where a corded, higher wattage grinder would hold up better over long sessions.
Pros and cons
- Cordless on Craftsman's 20V battery platform
- 9000 RPM rated speed for grinding and cutting
- No disc size or accessory compatibility listed
- Battery and charger inclusion not confirmed in this listing
- At 2.59 kilograms, heavier than some corded compacts
Performance notes
At 9000 RPM on a 20 volt battery, the CMCG400B is built for short bursts of grinding, cutting or deburring rather than continuous industrial use, the usual tradeoff of cordless grinders against corded models. The listed 2.59 kilogram weight is worth checking against your own grinder if hand fatigue over longer sessions matters to you.
Specifications
| Brand | Craftsman |
|---|---|
| Model | CMCG400B |
| Dimensions & fit | |
| Item Weight | 5.71 poundshigher than 81% of 107 power grinders |
| Item Dimensions L X W X H | 7 × 2.9 × 8.7 inches |
| Capacity & performance | |
| Maximum Rotational Speed | 9000 rpmlower than 72% of 122 power grinders |
| Power & efficiency | |
| Wattage | 20000 Milliwatts |
| Power Source | Battery |
| Voltage | 20 voltslower than 65% of 103 power grinders |
| Construction & materials | |
| Color | Black |
| Included components | |
| Unit Count | 1 |
| Included Components | (1) CMCG400 Small Angle Grinder (1) Grinding Guard (1) Grinding Wheel (1) Spanner Wrench Battery And Charger Sold Separately. |
| Other details | |
| Style Name | Grinder (Tool Only) |
| Item Type Name | Small Angle Grinder |
Closest rivals on specs
Ryobi R18AG-0 One+ Cordless Angle Grinder- Voltage 20 vs 18 volts (+11%)
Frequently asked questions
What battery does the Craftsman CMCG400B use?
It runs on Craftsman's 20 volt cordless battery platform.
How fast does it spin?
It is rated at 9000 RPM.
How much does it weigh?
The listed item weight is 2.59 kilograms, about 5.7 pounds.