Craftsman V20 Brushless RP CMCG451 Angle Grinder
Angle Grinder
$99

Craftsman

Craftsman V20 Brushless RP CMCG451 Angle Grinder

4.5(92 reviews across retail listings)

Craftsman's flagship grinder, part of the higher-output V20 BRUSHLESS RP line (2022) that sits above the brushed CMCG400. The brushless motor delivers up to 65% more power than Craftsman's base grinder, spinning 4-1/2-inch wheels at 8,500 RPM. A no-lock paddle switch, tool-free guard adjustment, 3-position side handle, and VERSATRACK wall-storage compatibility round out a simple, light 4.4-lb package. Listed at $149 but persistently discounted - Lowe's had it at $99 and Amazon deals dip to $79.

Bare Tool
$99
Platform
Craftsman V20
Weight
4.4 lbs (bare)
Best for: Craftsman V20 homeowners and DIYers who want a brushless, paddle-switch grinder for occasional cutting and rust removal at the lowest street price in the class

Specifications

Category
Angle Grinder
Battery Platform
Craftsman V20
Voltage
20V
Motor
Brushless
Model
CMCG451B
Weight
4.4 lbs (bare)
Released
2022
Wheel Size
4-1/2 in
No-Load Speed
8,500 RPM
Switch
Paddle
Spindle
5/8-11 UNC

Features

Tool-Free GuardSide Handle

Pros

  • Cheapest street price in the class - regularly $99 at Lowe's and spotted as low as $79 on Amazon, roughly half a pro-brand bare tool.
  • 4.5-star average across 92 Ace Hardware reviews, with Amazon listings scoring even higher - owners are consistently satisfied for DIY duty.
  • Lightest grinder in this roundup at 4.4 lbs bare - easy to control for beginners and comfortable overhead.
  • Brushless RP motor's 65%-more-power claim translates to real cutting ability on rebar, bolts, and fence posts that the brushed CMCG400 struggles with.
  • Tool-free guard adjustment and 3-position side handle match features of grinders costing twice as much.
  • No-lock paddle switch is a safe, approachable format for first-time grinder users.
  • V20 batteries are cheap, widely stocked at Lowe's and Ace, and shared across a huge DIY tool line.
  • 3-year limited warranty and VERSATRACK compatibility for garage organization.

Cons

  • No electric brake - the wheel free-spins after release, a safety feature every pro-tier rival here includes.
  • No kickback/bind-up shutoff electronics like Bosch KickBack Control, Flex's sensor, or Metabo HPT's anti-kickback.
  • 8,500 RPM is the slowest top speed in this roundup, and there's no variable speed for flap-disc or polishing work.
  • 4-1/2-inch wheels only - no 5- or 6-inch capacity.
  • Craftsman rates power against its own base model, not a corded amp class - sustained heavy grinding is beyond its DIY brief.
  • Small 2Ah V20 packs sag under load; realistic grinding needs 4Ah+ batteries that cost nearly as much as the tool.
  • No dedicated single-tool kit SKU - you assemble batteries and charger separately or via bundles.
  • No connected features, LED lights, or dust-management options - it's a bare-bones spec sheet.

Common Questions

What jobs is a $99 grinder actually good for?
Occasional cutting and rust removal at DIY scale — owners confirm the brushless motor has real ability on rebar, bolts, and fence posts that the brushed CMCG400 struggles with. Sustained heavy grinding is beyond its brief; note the '65% more power' claim is measured against Craftsman's own base model, not a corded amp class.
Does the wheel stop when I let go?
No — there's no electric brake, so the wheel free-spins down after release, and there are no kickback/bind-up shutoff electronics either. Every pro-tier rival in this class includes at least a brake, so this is the clearest place the budget shows; keep the guard on and let it wind down before setting it aside.
What size V20 battery does it need?
Bigger than you'd think — small 2Ah packs sag under grinding load, and realistic work needs 4Ah+ batteries that cost nearly as much as the tool itself. There's no dedicated kit SKU, so you assemble battery and charger separately or through V20 bundles.
Is it beginner-friendly?
Quite — the no-lock paddle switch is a safe, approachable format for first-time grinder users, it's the lightest grinder in its roundup at 4.4 lbs bare, and the tool-free guard and 3-position side handle match features of tools costing twice as much. The 3-year warranty is generous for the price class.
Where are the best prices on it?
It's regularly $99 at Lowe's and has been spotted as low as $79 on Amazon — roughly half a pro-brand bare tool. At those prices it's an easy add for anyone already on V20; buying into the platform just for it makes less sense given the battery cost.

Compare the Craftsman V20 Brushless RP CMCG451 Angle Grinder

Ryobi ONE+ HP PBLAG02 Angle Grinder
$99
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Ryobi's second-generation ONE+ HP brushless grinder (2024), superseding the PBLAG01. Same 11-amp-equivalent brushless motor and 9,200 RPM top speed, but adds improved heat management, an angled foot for flush cuts, a 3-position side handle, and a safer tooled flange nut. Ryobi claims up to 210 cuts through 3/8-inch rebar per charge. Regularly $129 bare and frequently promoted to $99.

11A-class power under $130Gen-II heat managementAngled foot for flush cuts
Ryobi ONE+18V4.1 lbs (bare)Brushless
Best for: ONE+ DIYers and homeowners who need occasional cutting and grinding without paying pro-tier prices
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Ridgid 18V Brushless R86047 Angle Grinder
$139
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Ridgid's current 18V flagship grinder (May 2022), superseding the Octane-era R86042B with a brushless motor Ridgid rates at up to 25% more power than its predecessor. Runs 4-1/2-inch wheels at 9,000 RPM with an electric brake, a grip-spanning paddle switch, tool-free guard and wheel changes via a folding-tab flange nut, and a 2-position side handle. Sold exclusively at Home Depot; registering unlocks Ridgid's free-parts-and-service Lifetime Service Agreement.

25% more power than prior genLifetime Service AgreementTool-free wheel and guard changes
Ridgid 18V18V4.5 lbs (bare)Brushless
Best for: Ridgid 18V owners and value-minded users who want a brake-equipped, paddle-switch grinder with a lifetime service agreement for light-to-medium metal work
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Makita 18V LXT XAG04 Angle Grinder
$169
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Makita's long-running brushless LXT grinder with Automatic Speed Change: it drops RPM and raises torque under load to keep the wheel moving. The slide switch with lock-on suits continuous grinding; a paddle-switch sibling (XAG09) covers no-lock jobsites.

ADT load sensingSlide switchLXT value
Makita 18V LXT18V5.6 lbs (with battery)Brushless
Best for: LXT owners who prefer a slide-switch grinder with lock-on for long, steady cuts
Full specs & owner notes
Milwaukee M18 Fuel 2880 Angle Grinder
$199
Angle Grinder

Milwaukee's braking M18 Fuel grinder, rated equivalent to an 11-amp corded tool with an 8,500 RPM brushless motor. The paddle-switch no-lock configuration is the OSHA-friendly pick; slide-switch and variable-speed siblings (2888) fill out the family.

Corded-class powerRapid Stop brakePaddle switch
Milwaukee M1818VBrushless
Best for: M18 users cutting and grinding metal daily who want corded power without a generator
Full specs & owner notes
DeWalt DCG415 Angle Grinder
$199
Angle Grinder

DeWalt's Power Detect flagship grinder: it senses larger batteries and raises output to 1,350 watts, spinning to a class-leading 9,000 RPM. The Kickback Brake and E-Clutch electronics shut the wheel down on pinch events before the tool wrenches your wrist.

Power Detect9,000 RPMKickback Brake
DeWalt 20V Max20V3.9 lbs (bare)Brushless
Best for: 20V Max users who want the smartest safety stack (kickback brake + clutch) in a cordless grinder
Full specs & owner notes
Flex 24V FX3171A Variable Speed Angle Grinder
$199
Angle Grinder

Flex's flagship 24V grinder, part of the brand's 2021 North American relaunch. A sensor-free brushless motor spins 4-1/2 or 5-inch wheels at up to 10,000 RPM - the highest top speed in this roundup - with touch-control speed settings of 3,500/5,000/7,000/10,000 RPM. Anti-kickback sensing stops the motor on bind-up, guard adjustment is one-step tool-free, and the vibration-suppression side handle tames buzz. FX3171A is the no-lock paddle version; FX3181A is the side-switch sibling. THERMA-TECH heat management and 24V packs push it toward corded-class sustained output.

10,000 RPM class-leading speed4-speed touch controlKickback sensor shutoff
Flex 24V24V4.2 lbs (bare)Brushless
Best for: Flex 24V adopters and fabricators who want the fastest wheel speed in the cordless 5-inch class plus true speed settings for flap-disc and blending work
Full specs & owner notes