The best cordless angle grinder for metalwork is the DEWALT DCG413B, a 4 1/2 inch brushless grinder with a kickback brake that halts the wheel in about two seconds. For raw cutting power on thick steel, the DEWALT DCG418B in the 60V MAX class runs circles around its 20V siblings. For variable speed control on stainless and thin-gauge work, the Milwaukee 2888-20 gives you five settings to dial in.
Those three cover most people who cut, grind or deburr metal. The rest of this roundup fills in the gaps: a compact body for tight spots, a battery kit that arrives complete, and a value pick for anyone building a ONE+ platform on a budget.
Before the picks, one honest caveat. A cordless angle grinder beats a corded one for repairs, field work and anything at height, because a mains lead across a scaffold or a ladder is a trip and burn hazard. For cutting metal all day without pause, a corded 11 amp grinder still wins, because battery packs are the limiting factor under sustained load. We will say more on that below.
If you want the wider picture on angle grinders generally, we have tested the best angle grinders across every category. This page is strictly about metal.
Table of Contents
Top 3 Best Cordless Angle Grinders for Metalwork (October 2026)
DEWALT DCG413B 20V MAX…
- Brushless motor
- Kickback brake
- 2 second wheel stop
- Two-stage trigger
Milwaukee 2880-20 M18 FUEL…
- Electronic clutch
- Anti-vibration handle
- 8500 rpm
- Overload protection
Quick Comparison: All 12 Cordless Angle Grinders for Metal in 2026
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1. DEWALT DCG413B 20V MAX 4-1/2 in Brushless Grinder: Best Overall for Metalwork
DEWALT 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, with Paddle Switch and Kickback Brake, Tool Only (DCG413B)
Brushless motor
Brake stops wheel in 2 seconds or less
Two-stage trigger
3.8 lb tool weight
Pros
- Plenty of power for cutting and grinding metal
- Kickback brake stops the wheel quickly
- Lightweight and well balanced for extended use
- Brushless motor needs no brush changes
- Standard Allen wrench works for disc changes
Cons
- Battery life limited on long grinding sessions with a 4Ah pack
- Spare charged battery needed for continuous metalwork
- Battery and charger sold separately
The DCG413B is the grinder we reach for first when someone asks which cordless angle grinder to buy for metal. It is a 4 1/2 inch brushless machine with a kickback brake that stops the wheel in two seconds or less, and the brake is the reason it has stayed at the top of our list.
Kickback is not theoretical. A long-term owner on r/PowerToolGuide ranked this model best overall specifically because of that brake, after a disc flew across his kitchen while he was cutting radiator pipe. That is exactly the scenario a pinch brake is designed to survive.
The same owner cut half-inch rebar without complaint. He also noted the grinder comes as a bare tool with no spanner in the box, and that is still true. Budget for a two-dollar pin wrench before your first wheel change.
Weight is the other quiet strength here. At 3.8 pounds for the tool body, it is one of the lighter full-size options in this roundup, which matters on a morning of overhead work on a ladder or in a crawlspace.
The two-stage trigger is worth getting used to. You must squeeze twice to start, and the E-Switch protection means the tool will not restart until you cycle the trigger after an unexpected shutdown. It is mildly annoying for ten minutes and then it stops mattering.
What you should know before you commit
The recurring complaint is runtime, not power. On a 4Ah pack, owners report roughly 20 to 30 minutes of continuous grinding, which is fine for repairs and short bursts but thin for a full day of production work. Most users run two packs, charging one while the other is in the tool.
Battery and charger are sold separately on this model, which pushes the real entry cost well past the bare tool figure. If you already own DEWALT 20V MAX packs, that cost is zero and this becomes an easy decision.
Who it suits and who it does not
This is the right grinder for a fabricator doing mixed work: cutting pipe, grinding welds, cleaning up a gate hinge. The brake and the balance give you margin when the wheel binds.
It is the wrong choice for a full shift of continuous heavy cutting. Reviewers are consistent that battery power fades where a corded 11 amp grinder keeps cutting, and the DCG418B in slot six exists for people who hit that wall.
2. Ryobi R18AG-0 ONE+ 18V Cordless Angle Grinder: Best Value
Ryobi 5133001903 R18AG-0 One+ Cordless Angle Grinder Angled
ONE+ 18V platform
9000 rpm no-load speed
Spindle lock and tool-free guard
Compact angled body
Pros
- Good power for cutting metal pipe and derusting
- Well balanced and comfortable in hand
- Compact body works in confined areas
- Spindle lock makes disc changes quick
- Shares batteries with the whole ONE+ range
Cons
- Runs hot under constant use
- Wheel change tool stored in the handle is confusing at first
The R18AG-0 is the one we recommend to anyone who already owns a couple of ONE+ packs, because inside that ecosystem it costs one bare tool and no charger.
Buyers highlight one-handed handling and clean cuts on sheet metal, which is the second most common metal task after cutting pipe. The angled body is genuinely compact, and that matters when you are working inside a cabinet or up against a wall.
For anyone building an ONE+ platform from scratch, our general angle grinder roundups cover the rest of that tool family.
Where the ONE+ platform earns its keep
The battery sharing is the real argument. If you already run ONE+ packs in a drill or a blower, this grinder costs you one bare tool and no charger. That changes the value math completely.
Ryobi also backs this grinder with three years of spare part availability in Europe, which is unusual for a tool at this end of the range and useful if you keep machines for a decade.
The heat problem, stated plainly
Heat build-up during long continuous grinding is the most common caveat in the reviews, and users recommend the highest-capacity pack available to soften it. That is not a dealbreaker for repair work, but it is a real limit on production grinding.
One oddity worth knowing: the wheel change tool stores inside the handle. It saves a loose pin wrench in the toolbox, but a few owners found it confusing on first use. Check the handle before you assume the wrench is missing.
3. DEWALT DCG416B 20V MAX FLEXVOLT Advantage Grinder: Best for Instant Shutoff
DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, Paddle Switch, 4-1/2-Inch to 5-Inch, Tool Only (DCG416B)
Up to 54 percent more power on FLEXVOLT
E-CLUTCH shutdown in a tenth of a second
Accepts 4-1/2 and 5 inch wheels
Pros
- Noticeably more power when run on a FLEXVOLT battery
- E-Clutch and Kickback Brake shut the motor down almost instantly
- Saves cutting wheels by preventing frayed blades
- Accepts both 4-1/2 inch and 5 inch wheels
- Paddle switch acts as a dead-man switch
Cons
- High current draw drains 2Ah and 4Ah packs quickly
- Quite heavy with a 60V FLEXVOLT battery fitted
- Paddle switch takes getting used to
The DCG416B is the same core grinder as our top pick with a smarter shutdown system and wider wheel compatibility. If you already own FLEXVOLT packs, this is the version that delivers real extra output.
DEWALT claims up to 54 percent more power when the tool runs on a FLEXVOLT battery instead of a 20V pack. Users report the jump is noticeable on thicker steel, and the E-CLUTCH shuts the motor down in under a tenth of a second when a pinch or stall is detected.
That instant shutoff has a second benefit people rarely mention: it stops the motor before a jammed wheel shatters, which extends wheel life and saves money on consumables over a year of work.
The tool-only box is unusually complete for a bare tool. You get the grinder, a side handle, a 4 1/2 inch Type 27 guard, a wrench and both inner and outer flanges. Nothing essential is missing.
Wheel flexibility is a genuine bonus. It accepts 4 1/2 inch and 5 inch wheels, so you can step up to a 5 inch cutoff for long straight cuts on bar and pipe without buying a second tool.
When the paddle switch earns its keep
The paddle switch is a dead-man control. Release it and the tool stops, which protects you if the wheel binds while you are bracing a cut. Users who came from small trigger switches describe it as the feature they noticed most after a week.
It also has a learning curve for anyone starting out. Expect a few jobs before your thumb stops hovering over the wrong part of the handle.
The battery platform decision
This is a battery platform purchase as much as a tool purchase. It runs on both 20V MAX and FLEXVOLT packs, so you can start on 20V and upgrade later, but the 54 percent figure only appears on the bigger cells.
Metal fabricators and DIYers highlight the power jump and the electronic shutoff as the reason to buy this over the standard model. The trade is runtime on smaller 20V packs and added weight when the big battery goes on.
4. CRAFTSMAN V20 CMCG400B 4-1/2 in Grinder: Best for Long Weld Cleanup
CRAFTSMAN V20* Angle Grinder, Small, 4-1/2-Inch, Tool Only (CMCG400B)
8500 rpm motor
Cast metal gear housing
Tool-free guard
Three-position handle
Pros
- 8500 rpm for aggressive metal grinding and cutting
- Cast metal gear housing dissipates heat in extended use
- Tool-free guard repositioning is quick
- Three-position handle and contoured overmold add control
- Backed by a limited lifetime warranty
Cons
- Tool-only configuration requires buying battery and charger separately
- V20 platform is less widely deployed than the major 18V and 20V ecosystems
The V20 CMCG400B is the pick for weld cleanup, and the reason is thermal rather than speed. Its cast metal gear housing dissipates heat through long sessions, which is exactly what grinding a fat weld bead in a fabrication shop demands.
At 8500 rpm it is not the fastest grinder here, but on grinding work that number matters less than how long the tool holds its grip on the work. Steady heat dissipation keeps motor speed from sagging as you work along a seam.
Controls are well thought out for the job. The handle sits in three positions so you can push the wheel into a bead from above, from the side or from underneath, and the tool-free guard repositions without tools.
It is also one of the better-equipped boxes in this roundup for the money. The grinder, a grinding guard, a grinding wheel and a spanner wrench all come together. You still need a battery and charger, but you do not need to buy a wheel before you start.
Ratings center on solid output for the money, a metal gear case that stays cooler during long grinds, and easy tool-free guard changes. That is a coherent package rather than one standout feature.
Platform fit matters more than specs here
The V20 battery ecosystem is not as widely deployed as DEWALT 20V MAX, Makita 18V LXT or Milwaukee M18. If you are starting from nothing, you are buying into a smaller pool of packs and chargers.
If a CRAFTSMAN V20 mower or trimmer already lives in your shed, this grinder becomes a straightforward add-on.
Where the limited lifetime warranty helps
CRAFTSMAN backs this tool with a limited lifetime warranty, which is stronger coverage than the three-year terms common on the majors and far stronger than the 30 day warranty on the budget Ryobi in slot eleven.
For a shop tool that gets used daily, that coverage is worth real money. The catch remains the bare-tool format: battery and charger are extra.
5. Milwaukee 2880-20 M18 FUEL 4-1/2 in Grinder: Top Rated for Control
Milwaukee 2880-20 M18 Fuel Brushless Lithium-Ion 4-1/2 in. / 5 in. Cordless Small Angle Grinder with No-Lock Paddle Switch (Tool Only)
8500 rpm
Electronic clutch for kickback protection
Anti-vibration side handle
5/8-11 spindle
Pros
- Electronic clutch provides kickback protection during metal cutting
- Anti-vibration side handle improves comfort and control
- Overload protection extends motor life
- Works with all M18 batteries
Cons
- Heavier than most rivals at 5 pounds
- Anti-vibration handle adds bulk in confined spaces
The Milwaukee 2880-20 wins on control. The anti-vibration side handle is the headline, and on steel it is the difference between finishing a cut and losing grip halfway through it.
Milwaukee puts a strong 90 percent five-star share on this tool, which is unusual for a grinder. The electronic clutch provides kickback protection by cutting motor power when the wheel jams, and overload protection guards the motor on heavy passes.
It runs 8500 rpm and takes 4 1/2 inch or 5 inch wheels on a 5/8-11 spindle, so it uses the same accessories as most professional grinders. Any grinding shop that already has a wheel inventory will have parts for this.
The paddle switch here is a no-lock design. That means you must hold it continuously, which some prefer because there is no accidental lock-on and no accidental lock-off.
The spindle is 5/8-11, the standard thread across the trade, so compatibility with cut-off wheels, grinding wheels and wire cups is total.
The weight question
At five pounds, this is one of the heavier grinders in the roundup, and users on forums consistently name Milwaukee M18 FUEL as heavy for a battery grinder. On long overhead passes or on a ladder, that adds up faster than the raw number suggests.
The anti-vibration handle partly offsets it. Dampened handles reduce the shock that normally tires your hands and forearms, so the effective fatigue load is lower than a bare weight comparison suggests.
Why M18 owners stay loyal
The grinder works with all M18 batteries, including high output packs. If you already run Milwaukee drills, saws and impact drivers, this tool slots into an ecosystem you own.
For pure metal finishing, where control and vibration damping beat everything else, the anti-vibration handle makes this our top rated pick despite the weight.
6. DEWALT DCG418B 60V MAX 4-1/2 to 6 in Grinder: Best for Big Cutoff Wheels
DEWALT FLEXVOLT 60V MAX* Angle Grinder with Kickback Brake, 4-1/2-Inch to 6-Inch, Tool Only (DCG418B)
13 amp equivalent power
9000 rpm
Brake stops in about 1.5 seconds
Takes wheels up to 6 inch
Pros
- Roughly twice as fast as a 20V DEWALT grinder on metal
- Built-in anti-kickback brake stopped pinching wheels without breaking discs
- Light balanced body for cramped spaces
- Guard rotates easily for either hand
- Includes both 4-1/2 and 6 inch guards
Cons
- Requires 60V FLEXVOLT batteries since 20V packs will not power it
- Higher up-front cost of the 60V platform
The DCG418B is the answer for anyone cutting thick section. With 13 amp equivalent motor power it delivers up to 30 percent more output than the DCG414, and users report chewing through steel pipe and concrete roughly twice as fast as a 20V DEWALT model.
Speed is the obvious benefit, but the wheel range matters just as much for metal. It takes anything from 4 1/2 inch up to 6 inch, which means long straight cuts through rebar bundles, heavy bar and structural section in a single pass.
Both a 4 1/2 inch and a 6 inch Type 27 guard come in the box, so you are not hunting a part after you commit to a big wheel.
The brake is the fastest in this roundup. On trigger release it stops in about 1.5 seconds, and the kickback brake plus E-CLUTCH system engages when a pinch, stall or bind-up is sensed.
Owners specifically credit the anti-kickback brake with saving wheels on pinched cuts. A wheel that survives a bind is a wheel you do not replace, and that compounds over a year of work.
What the 60V platform really costs
This tool only runs on 60V FLEXVOLT packs. A 20V battery will not power it, which is the deciding factor for many buyers and the reason it sits below our top pick despite the raw power advantage.
Batteries also drain fast on big jobs. If you do not already own 60V packs, you are buying into the most expensive corner of the DEWALT range, and for occasional metal cutting the 20V models make more sense.
When it is worth stepping up
Buy this grinder if you cut structural steel for a living, cut 6 inch stock regularly, or want one tool that covers everything from light cleanup to demolition. The doubled output is most visible on thick material.
Skip it if your metalwork is sheet, angle iron and light bar. There the DCG413B does the same job for a fraction of the platform cost.
7. AOBEN 21V Brushless 4-1/2 in Grinder Kit: Best Complete Kit
AOBEN Cordless Angle Grinder 4-1/2 inch, 21V Battery Grinder Kit, Power Electric Cut Off Tool, Brushless Motor, 2×4.0Ah Battery & Charger, for Metal Cutting, Grinding, Polishing
Brushless motor
Three speeds up to 9500 rpm
Two 4.0Ah packs and charger
Spindle lock
Pros
- Brushless motor delivers surprising power for its size
- Two included batteries remove mid-job recharging
- Three speed settings match RPM to the task
- Carrying case and six discs make a complete kit
- Quiet operation without hearing protection
Cons
- Safety latch on the power switch is easy to trip by accident
- Guard arrives in a position that exposes fingers to the wheel
- Battery capacity measured below the advertised figure
The AOBEN is the only true complete kit here. Two 21V 4.0Ah batteries, a charger, six discs, two guards, a handle, a wrench and a carrying case all come in the box, so you can cut steel the day it arrives.
Underneath it is a brushless motor with three adjustable speeds topping out at 9500 rpm. Owners find it surprisingly capable for light-duty pipe cutting, grinding and sanding, which is a fair description of where a kit like this belongs.
Two guards come with it, one full and one half-covered. The half guard is useful for grinding and finishing, and having both from the start saves a trip to the accessory aisle.
The safety complaints are real, so read them
Low ratings on this kit trace to three things: a safety latch that is easy to trip, a small plastic latch tab that looks fragile, and a guard that arrives in a position exposing your fingers to the wheel. Owners consistently reposition the guard before use. Do not skip that step.
Some buyers also measured battery capacity well below the advertised 4.0Ah, reported slower than expected charging, and found the observed RPM below the stated figure. Overload protection can also cut out during sustained grinding.
Forum consensus on Harbor Freight class tools is instructive here: buyers treat them as good for light work and moderate intermittent use, while heavy welding grinding still favours corded. That is a fair expectation for this kit.
Platform lock-in is the bigger question
The 21V packs are proprietary. Packs from other brands will not fit, so you are buying into a single-source platform with no resale value and limited pack availability if the brand disappears.
Against that, the total cost of getting running is lower than buying a bare tool plus batteries, charger and discs separately. For a first grinder on a budget with no existing platform, the math often favours the kit.
Who should buy it and who should not
Buy this if you are a hobbyist doing occasional pipe cutting, derusting or sharpening, and you want everything at once. It handles those jobs without drama.
Do not buy it for fabrication shop work. The safety latch and guard complaints are the wrong trade-off in an environment where someone is always within arm reach of a spinning wheel.
8. Makita XAG09Z 18V LXT 4-1/2 / 5 in Grinder: Best Box for the Money Spent
Makita XAG09Z 18V LXT Lithium-Ion Brushless Cordless 4-1/2″/5″ Cut-Off/Angle Grinder
10000 rpm no-load speed
Electric brake in 2 seconds or less
Active feedback sensing
Pros
- Electric brake stops the wheel in about 2 seconds
- Active feedback sensing shuts the motor off when the wheel jams
- Automatic speed change adjusts speed and torque during the cut
- Brushless motor runs cooler and extends tool life
- Up to 50 percent longer run time per charge
Cons
- Heavy at 5.7 pounds for extended overhead work
- No-lock paddle style control on some production units
The XAG09Z spins at 10000 rpm, the second-highest no-load speed among the 4 1/2 inch grinders here, and the electric brake stops the wheel in two seconds or less. That combination makes it a strong all-rounder for mixed metal work.
The safety system here is the most distinctive in the roundup. Active feedback-sensing technology turns the motor off if rotation of the wheel is suddenly forced to stop, which is a different detection method from a current-sensing clutch and reacts to the actual stall event.
Automatic speed change technology adjusts speed and torque during operation to suit the load. On a light grinding pass the wheel speeds up; when you lean into a cut it settles, which is the behaviour you want from a tool handling both jobs.
The brushless motor runs cooler and more efficiently, and Makita claims motor control delivers up to 50 percent longer run time per charge. On a full 18V LXT day of weld cleanup that is a meaningful difference.
What stands out most is the box. Even sold as a bare tool, it includes a stainless cut-off wheel, a 36 grit INOX grinding wheel, both a cut-off guard and a tool-less guard, and a lock nut wrench.
The wheel situation is the reason to buy it
Most bare grinders come with a guard and nothing to put on it. The XAG09Z arrives with an INOX grinding wheel and a stainless cut-off wheel, which are the two wheels you need for stainless deburring and thin sheet cutting respectively.
If you are starting from zero, this removes a real cost and a trip. You are ready to grind and cut on day one.
Weight and platform
At 5.7 pounds this is the heaviest grinder in the roundup, and forum owners note Makita weight is the first thing mentioned when comparing platforms. On a full day of overhead weld cleanup that gets tiring.
For 18V LXT owners it is a clean fit, and the three-year limited warranty matches the class standard. For everyone else, the included wheels are the argument that justifies the premium.
9. Milwaukee 2686-20 M18 11000 rpm Grinder: Best for Masonry and Tile
Milwaukee Electric – M18TRADE BRUSHLESS 4-1/2 / 5 Cut-Off Grinder
11000 rpm
Paddle switch
Tool-free guard adjustment
Electronic clutch
Pros
- 11000 rpm cuts stone tile and cement with real authority
- Electronic clutch and overload protection for jobsite durability
- Tool-free guard adjustment and paddle switch are quick to use
- Easy disc changes between 4-1/2 and 5 inch wheels
- Interchangeable side handle suits either hand
Cons
- Runs hot in direct sun or with buffing pads
- Thermal cutout can shut the tool down on sustained polishing
- Guard limits debris screening on polishing work
The 2686-20 runs at 11000 rpm, the highest no-load speed of any full-size grinder in this list. That number is a genuine advantage on masonry, tile and stone, where the job is removing material rather than shaping metal.
If your metalwork includes cutting angle iron for a masonry repair or trimming tile back to a fitting, that speed cuts time off every job. On steel it is simply more than you need.
Contractors running multiple crews describe this as a dependable workhorse with genuine power for masonry, tile and stone, holding up across many sites with minimal maintenance.
The control set is standard professional practice. Paddle switch, tool-free guard adjustment, overload protection and an electronic clutch are all present, and the side handle swaps sides for either handedness.
Disc changes between 4 1/2 inch and 5 inch wheels are straightforward, and the wrench comes in the box with the guard and handle.
Heat is the recurring complaint
The consistent complaint across reviews is heat. Extended use in direct sun builds temperature quickly enough that the thermal cutout can shut the tool down during long buffing or polishing sessions.
For cutting work this is a non-issue. Cuts are short bursts and the tool cools between them. It becomes a real limit only if you plan to run this tool as a polisher for hours, which it is not designed to be.
Why a metalworker might still want it
Two reasons. The 11000 rpm wheel speed makes it faster on thin stock and small diameter bar, and the M18 platform means it works with batteries you may already own.
If your work is 80 percent metal, the DCG413B in slot one is a better match. If it is mixed metal and hardscape, this one is the smarter buy.
10. Bosch GWS12V-30N 12V Max 3 in Compact Grinder: Best for Tight Spaces
BOSCH GWS12V-30N 12V Max Brushless 3 In. Cordless Angle Grinder (Bare Tool)
3 inch wheel
19500 no-load rpm
2.1 pounds
Spindle-clip wheel change
Pros
- Fits where larger 4-1/2 inch grinders physically cannot
- 19500 rpm cuts threaded rod strut and conduit cleanly
- Stays near 2.1 pounds even with a pack fitted
- Wheel stops in under a second when switched off
- Spindle-clip release makes wheel changes fast
Cons
- No variable speed control so it is on or off
- Switch must be held continuously which tires the hand
- Underpowered for heavy grinding and light duty only
The Bosch GWS12V-30N solves a problem no other grinder here can. At 3 inches with a body that fits in the palm of your hand, it reaches inside a cabinet, between studs or down into a chase where a full-size grinder physically will not go.
It also spins at 19500 rpm, which cuts threaded rod, strut and conduit cleanly. That is real cutting ability on small diameter stock, not a toy accessory.
At 2.1 pounds it stays light even with a pack fitted, which is the whole point for overhead and one-handed work. Restart protection prevents accidental startup when you swap batteries, a small thing that has saved more than one pair of hands.
What light duty really means here
Light duty for this tool means conduit, rebar ties, small brackets, sheet metal edges and surface cleanup. It is not a weld grinder and it will not chew through a thick gate hinge.
Users describe it as underpowered for heavy-duty grinding, and that is accurate. Treat it as the second grinder in the case rather than the only one.
Two complaints worth planning around
The switch must be held continuously with no variable speed, which tires the hand on longer cuts. That is the most repeated complaint in the reviews.
The other is stalling: once the battery drops below roughly half charge, the tool can stall out mid-cut. Most users solve it by keeping a second pack on hand, which is another reason to think about pack count before buying.
The spindle-clip release is worth praising. It locks the spindle and releases the wheel without a pin wrench, so disc changes in a confined space are far less frustrating than on most rivals.
11. Ryobi PCL445B ONE+ 18V Cordless Angle Grinder: Budget Pick
RYOBI PCL445B 18V Cordless 4-1/2 in. Angle Grinder (Tool Only)
9000 rpm motor
Die-cast metal gear case
Spindle lock
Three-position side handle
Pros
- 9000 rpm motor handles rapid material removal
- Die-cast metal gear case adds durability over plastic housings
- Spindle lock speeds up wheel changes
- Three-position side handle improves control
- Attractive entry price on the ONE+ 18V platform
Cons
- Battery and charger sold separately
- ABS plastic body is less rugged than all-metal housings
- Only a 30 day limited warranty
The PCL445B is the cheapest serious way into cordless grinding. At 9000 rpm with a die-cast metal gear case, it punches above its price for anyone starting out or adding a second platform tool.
Buyers note a capable budget 18V grinder that punches above its price, with the metal gear case doing more for durability than most tools at twice the price.
The die-cast gear case is the part to notice. Plastic gear housings crack when you bind a wheel against a workpiece, and a cracked case usually ends the tool. Metal cases survive the mistake.
Understand the 30 day warranty
This grinder carries a 30 day limited warranty, far shorter than the three-year terms standard on the majors and the limited lifetime warranty on the CRAFTSMAN. That is a meaningful difference if you plan to use it commercially.
It comes in bulk packaging with the tool only. Battery, charger and even the guard are separate purchases, so budget for all three before the first cut.
How it compares to the R18AG-0
Both sit on the ONE+ 18V platform, so your batteries work in either. The R18AG-0 in slot two has a tool-free adjustable guard, a spindle lock and three years of spare part availability, and it rates higher.
The PCL445B is the cheaper entry and carries a three-position side handle plus a metal gear case. If budget is the binding constraint, this is the one. If you can stretch, the R18AG-0 is the better tool and carries a far longer warranty.
12. Milwaukee 2888-20 18V Variable Speed Grinder: Best for Variable Speed
Milwaukee 2888-20 18V Cordless 4.5″/5″ Grinder w/Variable Speed (Tool Only)
8500 rpm
Five speed settings
Rapid Stop brake in 2 seconds or less
5.4 pounds
Pros
- Five speed settings let you dial RPM to the cut
- Rapid Stop brake halts the wheel in about 2 seconds
- Light enough for extended metalwork
- Handles fit the hand and include a side handle
- Runs well off high output M18 batteries
Cons
- Batteries heat up under heavy load so spares are needed
- Variable speed is not available on most competing grinders
The Milwaukee 2888-20 is the only grinder here with genuine variable speed, offering five settings so you can match wheel speed to the job instead of picking one RPM and living with it.
Steelworkers and fabricators single out the five-speed control and the rapid-stop motor brake as the standout features. The brake halts the wheel in two seconds or less.
There is a common misconception worth clearing up. Forum users note that variable speed is not critical for cutting or grinding, and that its real value shows up on polishing. Even so, on thin-gauge stainless and aluminium, a lower setting reduces wheel glazing and gives you a far cleaner cut.
The tool is frequently praised as light for its class at 5.4 pounds, and the handle shapes are well considered for extended metalwork. A guard, side handle and wrench all come in the box.
It runs well off high output M18 batteries, which matters if you already own the larger packs.
When five speeds actually matter
Use the low settings for thin sheet, aluminium and stainless. A wheel spinning at full speed on thin material burns the edge instead of cutting it, and the lower settings also keep sparks down.
Use the top settings for cutting section steel and for grinding, where material removal speed is the priority. The control range covers both ends of the job.
The battery heat caveat
The only consistent complaint is that batteries heat up under hard use, so users carry spares for long sessions. This is a normal characteristic of high-draw cordless tools rather than a fault.
If you are weighing this against the Milwaukee 2880-20 in slot five, the choice is control versus weight. This one gives you five speeds and a brake. The 2880-20 gives you an anti-vibration handle and less mass. Overhead work favours the 2880-20, bench and fabrication work favours the 2888-20.
Buying Guide: How to Choose a Cordless Angle Grinder for Metal
Metalwork punishes a grinder for two things it does not punish for wood: heat, and wheel grip when the disc binds. Everything below is organized around those two failure modes.
Seven things that matter on a metal grinder
A brake that stops the wheel fast. An electronic or kickback brake stops a bound wheel in one to two seconds. That is the difference between a scratched workpiece and a shattered wheel at head height.
A disc brake over a trigger brake. Paddle switches cut power the instant you relax, so a jam cannot leave the wheel spinning in your hand.
No-load RPM between 8000 and 11000. Higher is faster on stock removal, lower gives control on thin material. Note that no-load speed is not a power rating.
Disc size matched to the work. A 4 1/2 inch wheel is the metalwork default. Five inch cuts deeper and runs straighter on long cuts. Six inch belongs to demolition.
A metal gear housing. Cast metal cases dissipate heat and survive a bind. Plastic-only cases crack.
Guard adjustability. A tool-free guard that moves without wrenches saves minutes on every wheel change, and you will change wheels constantly.
Battery platform you already own. The grinder is often the cheapest way into a platform. The batteries and charger are not.
If you want a broader look at format, our reviews of the best angle grinders for cutting metal and the best angle grinders for welding cover adjacent use cases in more depth.
4-1/2 inch vs 5 inch wheels for metalwork
This is the most common question on metal forums, and the answer is task-dependent rather than absolute.
A 4 1/2 inch wheel accelerates fast, costs less per disc and clears tight geometry. For sheet metal, angle iron, small tube and general shop work it is the right default and it is what most of this roundup comes with.
A 5 inch wheel cuts deeper per pass and runs straighter on long cuts through bar and pipe, because a larger wheel resists bogging. For a fabricator spending a morning on 2 inch schedule pipe, the 5 inch option pays for itself in time saved.
Six inch wheels are for demolition and concrete. On steel they waste battery and are harder to control.
Our advice: buy a 4 1/2 inch machine that also accepts 5 inch wheels. Several models here, including the DCG416B and both Milwaukee FUEL grinders, take both sizes, so you cover the full range without owning two tools.
Which disc for which metal job
Cutting steel pipe and rebar: a thin cut-off wheel, roughly 1 mm or thinner, with a rating above the grinder’s no-load speed. Let the wheel do the work and keep a steady feed rate.
Grinding welds flat: a flap disc in the grit that matches your finish. A 40 grit for heavy weld cleanup, 60 to 80 for blending, 120 for final finish.
Removing rust from railings: a wire wheel or a 40 grit grinding wheel. Rust on old steel often needs a grinding wheel first, then a flap disc to blend the surface.
Deburring cut edges: a deburring wheel or a fine grit flap disc on low speed, if the grinder has variable speed.
Sharpening mower blades: a 60 grit grinding wheel, followed by a flap disc to remove the burr.
Stainless steel work: an INOX or stainless-rated wheel. A standard wheel contaminates stainless and then rusts.
Battery platform and the real cost of ownership
The listed price of a bare grinder tells you almost nothing about what you will end up spending. The batteries and charger frequently cost more than the tool itself.
The r/Tools consensus on continuous duty tools is blunt: batteries are the weak spot. Heavy metal cutting eats a pack quickly, and users keep a spare charging while the first is in the tool. Budget for at least two packs and a charger that suits your platform.
Platform lock-in is the other hidden cost. Switching brands means new packs, a new charger and possibly a new charger platform for every other tool you own. Consider that before treating a slightly better grinder as a bargain.
Two exceptions stand out. The AOBEN kit includes two batteries and a charger, which removes that cost entirely but locks you into a proprietary 21V platform. The Makita XAG09Z comes with two usable wheels, which removes a cost most bare tools leave you carrying.
When a corded grinder still wins
Be honest about this: for cutting metal all day without pause, a corded 11 amp grinder wins with no contest. Battery power fades under sustained load, and a long day of continuous cutting will outlast any pack.
Cordless wins where a cord is a hazard. On ladders, scaffolds, roofs, in crawlspaces, on remote sites and around finished interiors, a mains lead is a trip and burn risk. That is not a marginal advantage.
Many shops end up owning both, which is the honest answer for full-time metalworkers. Our view is that a cordless grinder is the right first purchase for almost everyone, because it covers the majority of metal tasks and covers the awkward locations the corded tool cannot reach.
Safety checks before you switch it on
Inspect every wheel before mounting it. A cracked or chipped wheel fails at speed, and the brake does not help.
Confirm the wheel speed rating exceeds the grinder’s no-load speed, printed on both the wheel and the tool body.
Fit the guard so sparks and debris travel away from your hands and body, and check it covers roughly 180 degrees.
Set the guard correctly for cutting versus grinding. Grinding sparks run into a wheel pinned by a guard.
Use the side handle for anything over a light pass. One-handed grinding on metal is how hands get hurt.
Wear eye protection, hearing protection and a face shield for cut-off wheels that throw sparks sideways.
Keep the work area clear of anything flammable. Sparks from a cut-off wheel travel a surprising distance.
Frequently Asked Questions
What is the best angle grinder for metalworking?
The DEWALT DCG413B 20V MAX is our best angle grinder for metalworking because its brushless 4 1/2 inch motor cuts and grinds steel reliably and its kickback brake stops the wheel in two seconds or less when the disc binds. For thick section, the 60V MAX DCG418B delivers roughly twice the output. For confined spaces, the 3 inch Bosch GWS12V-30N reaches places a full-size grinder cannot.
Who makes the best cordless angle grinder?
Three brands lead this roundup. DEWALT offers the widest range, from the 20V MAX DCG413B to the 60V MAX DCG418B. Milwaukee is strong on control with the M18 2880-20 anti-vibration handle. Makita builds the most complete bare-tool box with the XAG09Z. Which brand is best depends entirely on which battery platform you already own, since packs and chargers dominate the real cost.
What type of grinder is best for grinding metal?
A cordless angle grinder with a 4 1/2 inch disc and a brushless motor handles most metal grinding, and a model that accepts 5 inch wheels gives you more depth on thick work. Look for an electronic brake, a paddle switch and a metal gear housing. Use a grinding wheel for shaping and a flap disc for blending welds and finishing cut edges.
What is the best cordless angle grinder for the money?
The Ryobi R18AG-0 ONE+ 18V is the best cordless angle grinder for the money if you already own ONE+ batteries, since it costs you one bare tool and no charger. It runs at 9000 rpm with a spindle lock and tool-free guard. The AOBEN 21V kit is the alternative if you own no platform at all, because two batteries and a charger are included, but its guard and switch draw safety complaints.
Are cordless angle grinders as powerful as corded?
Not for continuous heavy cutting. A corded 11 amp grinder wins for cutting metal all day because battery power fades under sustained load, which is why keeping a spare pack on charge is standard practice. For repairs, field work, ladders and off-grid jobs, cordless is the better tool because a mains lead becomes a trip and burn hazard.
Do I need a brushless motor for metal grinding?
It helps. A brushless motor has no carbon brushes to replace, runs cooler and dissipates heat better, which is what sustained grinding demands. Several grinders here, including the DEWALT DCG413B, the Makita XAG09Z and the AOBEN kit, use brushless motors specifically because heat is the limiting factor on metal work.
Conclusion
The DEWALT DCG413B is the best cordless angle grinder for metalwork overall in 2026, because its kickback brake and balanced 3.8 pound body handle the two things that hurt you on metal: a binding wheel and a long morning of grinding.
Step up to the DCG418B for structural steel and 6 inch wheels. Choose the Milwaukee 2880-20 when vibration control matters more than weight, and the Milwaukee 2888-20 when you want five speed settings. The Makita XAG09Z gives you usable wheels in the box, the Bosch GWS12V-30N fits where nothing else will, and the Ryobi R18AG-0 is the cheapest sensible way onto a platform you may already own.
Whatever you pick, buy two packs before you start, and check the wheel speed rating every time you change a disc. If you are still comparing formats, our angle grinders for metal cutting guide covers the corded options in detail.
