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Craftsman V20 4-1/2 in Cordless Small Angle Grinder Kit CMCG400M1

Craftsman V20 4-1/2 in Cordless Small Angle Grinder Kit CMCG400M1

Best price now

$115.00at eBayObserved at 9:33 AM

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Our take on the Craftsman V20 4-1/2 in Cordless Small Angle Grinder Kit CMCG400M1

The Craftsman V20 4-1/2 in Angle Grinder Kit (CMCG400M1) is a cordless small angle grinder running on the V20 20V battery platform. It spins a 4-1/2 in wheel at 8,500 RPM, has a tool-free guard and a cast metal gear housing, and ships with one 4.0 Ah lithium battery. The best new price is $115.00 at eBay as of November 5, 2026, with two stores listing it new.

Best forHomeowners already on the V20 battery platformCutting and grinding metal, rebar and boltsLight welding cleanup and rust removalJobsite work where a cord is a hassle
Pros
  • Runs on the shared V20 20V battery line
  • 8,500 RPM matches many corded 4-1/2 in grinders
  • Tool-free guard adjustment speeds wheel changes
  • Cast metal gear housing holds up to drops
  • Kit includes a 4.0 Ah battery
Cons
  • Brushed motor, not brushless, so shorter runtime and life
  • One battery only, so long jobs need a spare
  • 4.0 Ah pack drains fast under heavy grinding
  • No case or extra wheels in the kit

Craftsman V20 4-1/2 in Cordless Small Angle Grinder Kit CMCG400M1 prices at every store

  • eBayNew

    In stock

    $115.00Observed at 9:33 AM
    Visit store
  • Fleet FarmNew

    Availability unknown

    $189.00Observed at 9:33 AM
    Visit store

Also available at

  • eBayCheck price at eBay
  • Acme ToolsCheck price at Acme Tools
  • spsindustrial.comCheck price at spsindustrial.com
  • ZoroCheck price at Zoro

Craftsman V20 4-1/2 in Cordless Small Angle Grinder Kit CMCG400M1 price history

Lowest price we've seen: $115.00 on Nov 5 at eBay. Tracked across 5 stores since Nov 5.

What reviewers say

Owners treat it as a solid value grinder for occasional metal work and like that it shares batteries with other V20 tools. Most complaints center on runtime and the brushed motor rather than the tool's cutting ability.

Pros
  • Good power for a cordless 4-1/2 in grinder
  • Easy guard and wheel changes
  • Fits the V20 batteries they already own
  • Holds up to home and light jobsite use
Cons
  • Battery drains quickly under load
  • Brushed motor is a step behind brushless rivals
  • Single battery limits longer sessions

Specifications

Power Source
Cordless Electric
Maximum Speed
8,500 RPM
Blade Diameter
4-1/2 in
Grinder Type
Small Angle Grinder
Grinder Brand
CRAFTSMAN
Grinder Series
V20
Grinder Model Number
cmcg400m1, CMCG450B
Maximum Rotational Speed
8,500 RPM
Motor Type
Brushless, Brushed
No Load Speed
8,500 RPM
Grinding Wheel Size
4-1/2 in
Applications
Grinding
Battery Voltage
20V
Battery Capacity
4.0 Ah
Battery Platform
V20
Battery Type
Lithium
Battery Included
Yes, Yes (1 Battery)
Height
8.25 in
Length
15.500 in
Width
6.375 in
Housing Material
Cast metal (gear housing)
Guard Type
Tool-Free guard position
Typical Users
ADULT

Questions and answers

Is the Craftsman V20 grinder worth it over a corded one?
If you already own V20 batteries, yes: it cuts and grinds like a basic corded 4-1/2 in grinder without a cord. For all-day heavy grinding, a corded or brushless model will hold speed and run longer.
How long does the 4.0 Ah battery last?
Expect short bursts of cutting or grinding rather than long sessions. Heavy continuous grinding can drain the 4.0 Ah pack in well under half an hour, so a spare battery is worth having.
Does it use standard 4-1/2 in wheels?
Yes. It takes common 4-1/2 in grinding and cutting wheels with a 7/8 in arbor, the same sizes sold for most small angle grinders.
What comes in the kit?
The grinder, one 20V 4.0 Ah lithium battery, a charger and a side handle. Wheels and a carrying case are not included.
Is it brushless?
No. The CMCG400M1 uses a brushed motor. Brushless V20 grinders cost more but deliver longer runtime and motor life.
When is the price lowest?
Cordless tool kits tend to dip during holiday sales and Father's Day promotions. At $115.00 at eBay as of November 5, 2026, it is already near the low end for a kit with a battery.
Where is the Craftsman V20 4-1/2 in Cordless Small Angle Grinder Kit CMCG400M1 cheapest?
At eBay, for $115.00, as of our latest check.
Where can I buy the Craftsman V20 4-1/2 in Cordless Small Angle Grinder Kit CMCG400M1?
5 stores we checked sell it, including eBay, Fleet Farm, Acme Tools, spsindustrial.com, Zoro.

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