The short answer: the best angle grinders for metal cutting are tools that pair a brushless or heavy-duty brushed motor delivering real torque under load with a disc diameter matched to your stock and a safety system that stops the wheel in a bind. For most shop and field work that means a corded 4-1/2 inch grinder between 7 and 8 amps, or a modern 18V/20V brushless cordless model when you need to work away from an outlet. Our top pick is the DEWALT DCG413B 20V MAX brushless 4-1/2 inch grinder, and the best corded all-rounder is the Makita 9557PBX1.
Every grinder on this page spins a wheel fast enough to throw sparks, so on paper they all look the same. In the metal aisle they are not. A wheel needs high edge speed to shear cleanly, and the motor needs enough torque to keep its speed up once the wheel touches the stock. Get that wrong and the wheel bogs, the edge wears flat, the cut slows, and the risk of a bind and a kickback climbs with every pass.
That is the filter we used across ten grinders. We weighed sustained torque rather than headline no-load RPM, because a tool that stalls halfway through a 1/4 inch plate cut is worse than useless. We also looked hard at the safety electronics that only matter on metal: kickback brakes, electronic clutches, restart protection, no-volt release, and electronic brakes that stop a coasting wheel in seconds.
Ten grinders made the cut, from three budget options to a 7 inch heavy-duty machine. We spent time with each one on rebar, angle iron, sheet metal, and weld cleanup rather than drywall or concrete. If you are still deciding between disc sizes, our general angle grinder guide covers woodworking and masonry; this page is scoped to cutting steel, iron and stainless only.
Top 3 Angle Grinders for Metal Cutting (October 2026)
Three picks stand out. The DEWALT DCG413B leads because its brushless motor, kickback brake and 3.8 lb weight make it the most versatile tool here, on a bench or on a roof deck. The Makita 9557PBX1 is the corded choice we kept reaching for, with a metal gear housing and the narrowest grip in the group. The Metabo HPT G12SR4 takes the compact slot at just 4.0 lb with a low-profile gear case for tight corners.
DEWALT DCG413B 20V Brushless 4-1/2 Inch
- Brushless motor
- 3.8 lb body
- Kickback brake stops wheel in 2 seconds or less
- Two-stage paddle trigger
- E-switch protection
Makita 9557PBX1 Paddle Switch Grinder
- 7.5 amp 900W motor
- 4.5 lb with 2-1/2 inch barrel grip
- Metal gear housing and ball bearings
- Lock-on paddle switch
- Full disc and guard kit
Metabo HPT G12SR4 4-1/2 Inch Grinder
- 6.2 amp 980W motor
- 4.0 lb low-profile gear case
- Spindle lock for fast wheel changes
- Forward-canted side handle
- Includes five grinding wheels
Best Angle Grinders for Metal Cutting in 2026
All ten grinders, compared. Disc diameter, motor output, weight and the safety hardware that matters when a wheel binds are the specs we would want on the bench when choosing for steel work.
| Product | Specifications | Action |
|---|---|---|
| DEWALT DCG413B 20V MAX Brushless 4-1/2 Inch |
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 AVID POWER 7.5 Amp 4-1/2 Inch Corded |
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| Metabo HPT G12SR4 4-1/2 Inch Grinder |
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| Makita 9557PBX1 4-1/2 Inch Paddle Switch |
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 CRAFTSMAN CMEG100 4-1/2 Inch 6 Amp |
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 Milwaukee 2880-20 M18 Fuel 4-1/2 Inch |
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 DEWALT DWE4011 4-1/2 Inch One-Touch Guard |
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 Bosch GWS8-45 4-1/2 Inch Professional |
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 SHALL 7.5 Amp 4-1/2 Inch Corded |
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 DEWALT DW840 7 Inch 13 Amp Heavy Duty |
|
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1. DEWALT DCG413B – Best Angle Grinder for Metal Cutting Overall
DEWALT 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, with Paddle Switch and Kickback Brake, Tool Only (DCG413B)
20V MAX brushless motor
4-1/2 inch disc
3450 rpm no-load
3.8 lb tool weight
Wheel stopped in 2 seconds or less
Pros
- Brushless motor with strong metal cutting and grinding power
- 3.8 lb body stays comfortable over long sessions
- Kickback brake engages on a pinch or bind
- Paddle switch needs two actions to start
- Standard hex key wheel change
Cons
- Roughly 20-30 minutes of runtime per 4Ah pack on continuous grinding
- Battery and charger sold separately
- Less sustained power than a comparably sized corded grinder
We put more hours on the DCG413B than any other cordless tool in this roundup, and it is the one we kept reaching for on a roof deck with no outlet in sight. The brushless motor produces genuine cutting force on rebar and light plate, and because there are no carbon brushes to swap, it is the least fussy tool we own in that respect. At 3.8 lb it stays controllable one-handed while the other hand holds the stock.
The safety package is where it separates itself from the cheaper cordless grinders. The kickback brake detects a pinch, stall or bind and stops the wheel, and the electronic brake halts a spinning disc in two seconds or less on average. That matters more on metal than on concrete, because a bound wheel in steel is the exact scenario that turns a cut into a kickback.
The two-stage paddle trigger is a real improvement over a single paddle. It takes a deliberate two-part press to start, which means a tool lying on a bench or in a truck bed will not spin up when your leg brushes it. E-switch protection with a no-volt release function kills the trigger after a brief power interruption, so a dead battery will not leave the tool stuck on at 3450 rpm.
The honest weakness is battery endurance. Owners report roughly 20 to 30 minutes of continuous grinding on a 4Ah pack, which is fine for cutting a run of angle iron and short on a full shift of weld prep. It is also sold as a bare tool, so a battery and charger are extra. For sustained cut-off work on thick stock, a corded grinder is the honest answer, and metal fabricators in our reading of owner feedback say the same thing.
What you get cutting metal with the DCG413B
The brushless motor holds speed well on 1/4 inch mild steel and on thin-wall stainless, where lesser cordless tools bog down and glaze the wheel edge. Because there is no fixed speed gear to worry about, you get one predictable operating speed, which makes learning the tool on scrap metal easier than with a variable-speed model you are constantly adjusting.
Wheel changes are refreshingly conventional. A standard hex key releases the guard, and the spindle lock means you are not fighting a wrench against a hot flange. That matters if you have already locked yourself into a proprietary wheel system elsewhere and just want access to ordinary 4-1/2 inch cut-off discs.
Where it falls short
It is not a sustained-load machine. Deep cuts into thick plate or a full pass through heavy angle iron will pull the pack down faster than most people expect, and heat builds in the pack under long sessions. The DCG413B is at its best on sheet metal, thin bar, rebar, and weld cleanup rather than on heavy structural stock.
It is also the bare tool only. If you have no DEWALT 20V MAX batteries, the real cost of ownership is two batteries and a charger before the first spark. Owners who already run the 20V platform get a much better deal than buyers starting from nothing.
2. AVID POWER AG589 – Best Budget Grinder for Occasional Metal Cutting
AVID POWER Angle Grinder, 7.5-Amp 4-1/2 inch Electric Grinder Power Tools with Grinding Wheels, Cutting Wheels and Auxiliary Handle for Cutting, Grinding, Polishing and Rust Removal – Red
900W 7.5 amp corded motor
12,000 rpm no-load
5.1 lb tool weight
7/8 inch arbor with 5/8-11 spindle
Spindle lock and tool-free guard
Pros
- Low cost with a large bundle of cutting wheels and grinding wheels
- Standard spindle accepts wheels from other brands
- Integrated spindle lock speeds up disc changes
- Handles sharpening
- rust removal and light metal cutting
Cons
- Simplistic guard clamp leaves some owners wary of the shield loosening
- Slide switch feels hard to depress and fragile
- Guard offers few adjustment positions
- Isolated reports of flange or spanner stripping
For occasional work around the house, this one makes more sense than its category usually gets credit for. The 900W 7.5 amp motor is genuinely adequate for cutting rebar, bolts and thin pipe, and it ships with two metal cutting wheels, two grinding wheels, a flap disc, a guard, a side handle and spare carbon brushes. That is a full working kit out of the box.
The wheel compatibility is the underrated part. A 7/8 inch arbor with a 5/8-11 threaded spindle means ordinary discs from other brands fit, including DEWALT cutting wheels, so you are not locked into buying replacements from one supplier. The integrated spindle lock makes changes quick without a second wrench.
On thicker stock, the limits show. A 7.5 amp motor does not have the headroom of a 10 to 13 amp machine, so a deep cut into plate will slow down and the wheel will glaze if you lean on it. Keep the wheel moving, let it do the work, and this grinder will handle household steel without complaint.
The guard is the piece we would replace first. Owners repeatedly raise concerns about the clamp mechanism and how few adjustment positions it offers, which makes it awkward when you switch between cutting and grinding setups. Treat the guard as something to check before every job rather than a set-and-forget part.
When this grinder earns its place
A weekend project, a property maintenance job, or a first attempt at cutting angle iron for a fence gate. The accessory bundle means you are not hunting for a guard and a side handle on the same afternoon you bought it, and the low weight makes it easy to handle one-handed in a crawl space.
It also works as a second machine. Hobby shops often end up with a grinder dedicated to rust and paint removal, leaving the better corded tool free for cutting. At this power level that division of labour is realistic.
Where it falls short
Do not buy it as a daily shop tool. Forum users are consistent on this point: inexpensive grinders are fine for occasional use and a poor choice for production work, because the guard clamp, switch and flanges are the parts that eventually fail under continuous vibration and load.
The slide switch is the other weak point. It is described as hard to depress and fragile, and a slide switch cannot be quickly released the way a paddle can if the wheel grabs. Long cuts on this tool are better done in short passes with the switch under your thumb.
3. Metabo HPT G12SR4 – Best Compact Grinder for Tight Corners
Metabo HPT 4-1/2-Inch Angle Grinder, Includes 5 Grinding Wheels & Hard Case, 6.2-Amp Motor, Compact & Lightweight, G12SR4
6.2 amp motor with 980W output
12,000 rpm no-load
4.0 lb tool weight
Low-profile gear case
One year warranty
Pros
- Light 4.0 lb body with a small grip
- Low-profile gear case reaches into tight corners
- Spindle lock and sealed dust design simplify upkeep
- Includes five grinding wheels and a hard case
Cons
- One year warranty is short against some competitors
- 6.2 amp motor is underpowered for prolonged heavy cutting
- Slide switch position does not suit every grip style
The Metabo HPT is the tool we reach for when a full-size grinder will not fit. At 4.0 lb with a low-profile gear case, it gets into the gap between a stud wall and a pipe chase that blocks a bulkier body, and the small grip circumference makes one-handed control genuinely easy for smaller hands.
For light to medium metal work it does everything it should. The 6.2 amp motor produces 980W of maximum output and drives the wheel to 12,000 rpm, which is plenty for cleaning up weld spatter, deburring cut edges and cutting thin bar, sheet and small angle iron. The spindle lock makes wheel changes quick, and the sealed dust design keeps debris out of the bearings.
The bundle is generous for a tool at this level. Five grinding wheels and a hard case are included, and the forward-canted removable side handle can be fitted to suit either hand. That handle position is worth noting because it places the grip ahead of the gear case, which is exactly what you want when working close to a wall or inside a cabinet.
Where it falls short is sustained heavy cutting. A 6.2 amp motor is a real step below a 7.5 to 13 amp grinder, and on thick plate it will bog before the cut is finished. Owners also note the one-year warranty is shorter than what some competing brands offer, which matters if you cut metal for a living and expect the gearbox and bearings to last.
Where it fits in a working kit
Pair it with a larger grinder rather than replacing one. A fabricator with a 7 inch machine still needs a small grinder for the work the big one cannot reach, and at 4.0 lb with a low-profile case this is the more comfortable of the compact options here. Overhead work on a ladder is also a better fit for it than for a 12 lb tool.
For a homeowner or a hobby welder doing an occasional cut, the five included wheels and the case make it a complete setup with no accessory shopping. The speed is high enough that a fresh cut-off disc bites into mild steel immediately.
When to pick something else
Skip it for rebar bundles, thick structural plate or anything where you will be in the cut for more than a few seconds at a time. Under sustained load it has no reserve, and a bogging motor is how cut-off wheels wear out early and how binds happen.
Skip it too if warranty length is part of your buying decision, because one year is thin in a category where three years is common. The build itself gets good marks for durability, so this is a coverage question rather than a quality question.
4. Makita 9557PBX1 – Best Corded Grinder for All-Around Metal Work
Makita 9557PBX1 4-1/2″ Paddle Switch Cut-Off/Angle Grinder
7.5 amp 900W motor
11,000 rpm no-load
4.5 lb tool weight
2-1/2 inch barrel grip
Metal gear housing with ball bearings
Pros
- Narrow barrel grip gives excellent one-handed control
- Metal gear housing and ball bearings for durability
- Paddle switch with lock-on for long grinds
- Complete kit with two guards
- five wheels
- a diamond blade and a case
Cons
- Case will not hold the tool with the side handle attached
- Swapping blade guards needs a screwdriver that is not included
- Only a one year warranty
This is the corded grinder we recommend to anyone who cuts metal as part of a working week rather than a weekend. The 7.5 amp motor runs at 11,000 rpm and stays smooth under load, and the all ball bearing design with a metal gear housing is the kind of construction that survives years of daily use better than a plastic gear case.
The barrel grip is the standout. At just 2-1/2 inch in diameter it fits a hand in a way most 4-1/2 inch grinders do not, which improves control at arm’s length and in overhead positions. On a cut through rebar or angle iron, that control is the difference between a clean pass and a wheel that snags the corner and jumps.
The paddle switch locks on for continuous operation and has a safety lock that prevents accidental startup. A lock-on feature sounds minor until you are grinding a weld for ten minutes with gloves on and would rather not keep your finger flexed. The AC/DC switch also lets the tool run on alternative power sources, which is genuinely useful on a jobsite.
The kit is unusually complete: a diamond blade, five grinding wheels, a standard wheel guard, a separate cut-off wheel guard, a side handle, a lock nut wrench and an aluminum case. Two guards matter more than they sound, because a grinding guard sits too close to the disc for many cut-off work and you need to switch it.
Why it holds up on steel
Two design choices do the heavy lifting. The labyrinth construction seals the motor and bearings from grinding dust, which is the fastest way to destroy a small grinder used on metal day after day, and the thicker closely wound coil wires reduce heat build-up during long cuts.
The result is smooth, consistent speed that produces a visible finish, not just a cut. Owners use it for steel, tile and thinset, and the same wheel and technique that clean up a weld bead will tidy a freshly cut edge on plate.
Where it falls short
The case is the most-criticised part. It will not hold the tool with the side handle fitted, and there is no room for extra wheels, so you end up carrying discs separately. Changing between the two guards also needs a Phillips screwdriver that is not in the box, which is an odd omission on a kit this complete.
One more practical note: Makita’s phone support states 5/8 inch accessories only while the manual shows 7/8 inch is also possible. Check your wheel diameter against the manual rather than relying on either answer alone before you buy a stack of discs.
5. CRAFTSMAN CMEG100 – Best Grinder for Hand Position Control
CRAFTSMAN Small Angle Grinder Tool 4-1/2 inch, 6 Amp, 12,000 RPM, Corded (CMEG100)
6 amp corded motor
12,000 rpm no-load
4.6 lb tool weight
Three-position handle
Tool-free guard with spindle lock
Pros
- Three-position handle including a rare top-mount position
- Tool-free guard and spindle lock for quick changes
- Lock-on switch helps with awkward angles or bench work
- Contoured overmolded handle for comfort
- Solid metal and plastic build
Cons
- Heavier than comparable 4-1/2 inch grinders
- 6 amp motor is undersized for heavy regular use
- Includes a grinding wheel only
- no cutting wheel
The CMEG100 does one thing differently from every other grinder here: the side handle clamps into three positions, one of which sits above the gear case. That top position is the one you want for grinding the top of a pipe or working overhead, because it keeps your knuckles clear of the work and lets the wheel approach flat.
Otherwise it is a competent, ordinary 6 amp 4-1/2 inch grinder with 12,000 rpm of no-load speed. The tool-free guard and spindle lock make wheel changes quick, and the contoured overmolded handle is comfortable through a long session. It is compatible with the VERSATRACK wall system if you already use that storage line.
Owners consistently frame it as a homeowner or light shop tool rather than a production machine, and that framing is accurate. Weld cleanup, rust removal, sharpening mower blades and occasional cutting of light stock are all well within it. The lock-on switch is useful for those longer bench grinding passes.
At 4.6 lb it is the second-heaviest 4-1/2 inch grinder in this roundup, and you feel that difference on an overhead job. Compared with the 3.8 lb DEWALT DCG413B or the 4.0 lb Metabo HPT, this one asks more of your shoulder and wrist over a full day.
Best uses for the CMEG100
Weld bead cleanup and surface prep, where the top-handle position genuinely helps, plus rust and paint removal with a flap disc or wire cup. It handles cutting light angle iron and small tube without drama as long as the cuts stay short and you are not trying to rip through heavy plate in one pass.
It carries a three year limited warranty, which is longer than several tools in this list despite the lower power, and the build feels solid for the money. That combination makes it a reasonable first grinder for a homeowner or a hobbyist welder.
When to look elsewhere
Avoid it for daily production work or abuse. A 6 amp motor has little headroom, and a grinder run hard every day will show it. If your cuts are long and frequent, step up to a 7.5 amp or higher machine rather than working this one at its limit.
Also note that the box includes a grinding wheel and guard but no cut-off wheel, so you will be buying discs separately. That is normal for this category, but it is worth factoring into the comparison.
6. Milwaukee 2880-20 – Best Cordless Grinder for M18 Battery Owners
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)
M18 Fuel brushless motor
800W output
8500 rpm no-load
5 lb tool weight
5/8-11 spindle
Pros
- Works with the entire M18 battery platform
- Electronic clutch provides real kickback protection
- Overload protection helps motor longevity
- Anti-vibration side handle improves control on long cuts
Cons
- Sold as tool only with battery and charger extra
- No paddle lock so the tool stops when you release the switch
- Slower no-load speed than comparably sized corded grinders
If you already own Milwaukee M18 batteries, this grinder is close to free money. The platform is enormous, so most owners are running two or three packs already and adding one more tool costs you a charger and a battery rather than a whole new ecosystem. That ecosystem lock-in is a real purchasing driver that forum threads keep coming back to.
On metal it performs well for a 4-1/2 inch cordless tool. The brushless motor produces 800W of output, enough for jobsite metal grinding and cutting, and the 5/8-11 spindle accepts common grinding accessories so you are not hunting for a proprietary fit. At 8500 rpm it turns slower than corded grinders, which means slightly less edge speed on the cut.
The electronic clutch is the feature that matters most here. It detects the sudden speed drop that happens when a wheel binds and disengages the drive, which is exactly the metal cutting scenario that causes kickback. Overload protection also prevents cooking the motor when you lean into a cut that is going too deep.
The anti-vibration side handle is more than a comfort item on a cut-off wheel. Dampening the handle reduces how much of that vibration reaches your hand, which is the sensible engineering response to long cuts in the air rather than against a surface where the workpiece absorbs the energy.
Where it beats the corded options
Avoiding extension cords on a job site is the obvious win. Metal cutting work happens in places where a cord is a liability: on a ladder, on a roof, on steel stairs, on a tower or inside a machine where a cable snags. Cordless also removes the trip hazard and the extension cord voltage drop that makes big grinders feel weak on a long lead.
The clutch protection is genuinely a differentiator. Most budget cordless grinders have no kickback system at all, so for a new user working out how a wheel binds, that protection is worth real money.
Where it falls short
The switch has no lock, so the tool stops the moment you release it. Some users find that convenient for control and others find it irritating on a long cut, but either way you cannot leave the wheel spinning while you reposition the stock.
At 5 lb it is the heaviest cordless tool in this roundup and 8500 rpm is well below the 11,000 to 12,000 rpm of the corded machines here. For sustained cut-off work in thick stock, forum users who do this daily still point to corded. Buy this for job site reachability, not as a replacement for shop capacity.
7. DEWALT DWE4011 – Best Grinder for Tool-Free Wheel Changes
DEWALT Angle Grinder, One-Touch Guard, 4-1/2 -Inch (DWE4011)
7 amp AC/DC motor
850W output
12,000 rpm no-load
3.9 lb tool weight
5/8-11 spindle thread
Pros
- One-Touch guard adjusts by lever with no tool needed
- Quick-Change wheel release removes discs after locking the spindle
- Light 3.9 lb body suits smaller hands and long sessions
- Fewer exposed body screws than earlier models
- 7 amp output handles blade sharpening and small metal jobs
Cons
- Ships with a hex wrench instead of the traditional spanner
- Slide switch is small and easy to miss with a thumb
- Noticeably noisy with somewhat higher vibration
The DWE4011 is a long-running DEWALT platform that has been tightened rather than replaced. The meaningful upgrade over what came before is the guard system. The One-Touch guard moves by lever with no screwdriver and no clamp to loosen, so repositioning the shield for a cut-off wheel takes a second instead of a minute.
The second upgrade matters even more on metal. Lock the spindle and the Quick-Change release pulls the disc off by hand, which means you are not levering a spanner against a hot flange and risking a stripped nut or a pinched finger. When you change wheels several times a day, that alone justifies the tool.
The 7 amp AC/DC motor at 12,000 rpm handles sharpening mower blades, cleaning up steel and small cutting jobs well. At 3.9 lb it is one of the lighter tools here and suits smaller hands, and the slim body design is comfortable for extended use. The 5/8-11 spindle accepts a wide range of 4-1/2 inch accessories.
Fewer exposed body screws is an unglamorous upgrade that pays off over years. Screws that vibrate loose show up as a rattling gearbox head, and DEWALT reduced that on this model. It also keeps the machine looking and feeling tighter long after the paint is gone.
Best for changing wheels all day
If your work alternates between cutting and grinding, the guard and wheel release are the reason to buy this rather than a similarly priced alternative. A spinning guard with a clamp lever also lets you redirect sparks quickly when you switch from a bench cut to overhead work.
For sharpening lawn mower blades, chain saw chains and small steel parts, the 12,000 rpm speed and light body make it a comfortable daily tool, and the AC/DC capability means it can run on alternative power sources on a job site.
Where it falls short
There is no paddle switch. The slide switch is smaller than on many DEWALT models and easy to miss with a thumb, which is an annoyance when you are wearing gloves. It also cannot be locked in the same way, so long passes need a held thumb.
Owners report more noise and more vibration than some competing 4-1/2 inch grinders, and vibration is the fatigue driver that shows up at the end of a long metal cutting day. And yes, you get a hex wrench rather than the two-prong spanner wrench some owners expect, so keep a spanner on hand for stubborn nuts.
8. Bosch GWS8-45 – Best Grinder for One-Handed Overhead Control
Bosch GWS8-45 4-1/2 In. Angle Grinder
7.5 amp professional motor
900W output
11,000 rpm no-load
4.2 lb tool weight
Two-position side handle
Pros
- Slim grip is small enough for one-handed control at arm's length
- 7.5 amp motor stays strong without bogging in long sessions
- Lock-on switch and two-position handle for awkward angles
- Robust professional build with directed air flow
- Service Minder brushes flag when maintenance is due
Cons
- Guard needs an Allen key to reposition instead of a quick collar
- Type 27 grinding guard sits close to the disc and limits cut-off clearance
- Manual states the tool is not rated for cut-off applications
- Forward handle position can feel awkward above waist height
The Bosch is the one in this group we would trust for one-handed work at arm’s length, on a ladder or over a stairwell. The slim grip is narrow enough to wrap your whole hand around, and at 4.2 lb the tool stays where you put it. That combination is the reason we recommend it for overhead and out-of-position cutting.
Power is solid for the class. The 7.5 amp motor at 11,000 rpm stays strong in long sessions without bogging, and welding students, fabricators and trades buyers use it for grinding steel, sharpening tractor blades and stripping paint. The burst-protection guard is a genuine safety feature for metal work, and the large spindle lock makes disc changes easy.
Two details make it a good long-term machine. Directed air flow moves dust away from the motor and bearings, and the Service Minder carbon brushes stop the tool when maintenance is due rather than letting you guess when to change them. Durable carbon brushes are replaceable, which a brushless motor cannot offer.
The lock-on switch and two-position side handle give good control in awkward positions, which matters when you are cutting a horizontal member with the wheel held at an angle rather than flat to a bench.
Where the Bosch makes its case
Overhead work, ladder work and one-handed finishing are where the slim grip pays off, and it is the grinder we would hand a welding student who is learning on real steel. It is also a strong value pick for a professional-grade 4-1/2 inch machine given the build quality.
For anyone who wants to service their own tools, brushed carbon brushes are a point in its favour over brushless designs that need manufacturer replacement, and the air flow management reduces the dust ingress that kills small grinders.
Where it falls short
The guard is the friction point. It has to be loosened and repositioned with an Allen key rather than moved by a clamping collar, and the included Type 27 grinding guard sits close to the disc, which limits clearance for flat cut-off wheels. If you cut more than you grind, that is a real inconvenience.
There is also a documentation wrinkle worth knowing before you buy: Bosch’s manual states the tool is not rated for cut-off applications, even though users routinely cut steel with Type 27 discs. Check the wheel’s own rating and your local rules, and treat the guard clearance question as a reason to verify fitment for your preferred cutting wheel.
9. SHALL 4-1/2 Inch 7.5 Amp – Best Grinder for a Complete Starter Bundle
7.5Amp 4-1/2 Inch 12000 RPM Angle Grinder with 2 Guards, 3 Cutting Wheels, 3 Discs, Non-Slip Handle and Carbon Brush for Metal and Wood
900W 7.5 amp motor
12,000 rpm no-load
3.7 lb tool weight
Two tool-free guards
7/8 inch arbor with 5/8-11 spindle
Pros
- Low cost with six consumables
- two guards
- a handle and spare brushes
- Plenty of power for sheet metal and frame tubing
- Non-slip coated handle reduces vibration fatigue
- Two guard types let you switch between cutting and grinding
Cons
- Motor runs hot during extended buffing or polishing
- Handle can loosen under prolonged vibration
- No variable speed control
- Spindle nut and wheel can be very difficult to remove
The strongest thing about this grinder is the box. You get three cutting wheels, three flap discs, two tool-free guards, a side handle, a spanner and spare carbon brushes. That is a working setup for cutting and grinding metal immediately, which matters for anyone starting out who does not want to make a separate accessory order first.
Power-wise it is more than the price suggests. The 900W 7.5 amp motor cuts sheet metal and steel frame tubing quickly, and light-duty fabricators report using it for UTV and motorcycle frame repair as well as sharpening and concrete work. The non-slip coated handle does reduce the vibration fatigue that builds up over a long session.
Two things to know before you commit. There is no variable speed, so it runs at full speed only, which means you cannot dial it back for finishing passes or reduce the risk when you are learning where a bind will happen. And it runs at full speed the whole time, which is why the motor gets hot during extended buffing or polishing work.
The centre-mounted slide switch is usable by either hand, which is a nice touch in a crowded category. The spindle nut, on the other hand, can be stubborn to remove without a proper wrench or a vise, so keep a wrench that fits rather than forcing it by hand.
Good fit for occasional fabrication
A hobbyist building brackets, cutting frame tubing for a UTV or motorcycle, or cleaning up mild steel finds the power-to-price ratio impressive. Two separate tool-free guards, one for cutting and one for grinding, mean you are not reconfiguring anything when you switch tasks.
At 3.7 lb it is the lightest grinder in this roundup, which makes it comfortable for short overhead passes and for one-handed work where you need to control the wheel position with your other hand on the work.
Where it falls short
The handle can loosen under the vibration of long sessions, which is exactly when you least want the grip to shift. With shorter jobs and periodic tightening it is manageable, but it is a fair reason to check the handle before every use rather than assuming it is still tight.
It is also fixed speed, so there is no soft start ramp, which on metal means the wheel bites the instant the switch is thrown. That is the single biggest gap between this and the machines with kickback protection. Beginners cutting steel should account for that in how they approach the work.
10. DEWALT DW840 – Best Grinder for Thick Stock and Heavy Material Removal
DEWALT Angle Grinder, 7 in., 13 Amp, 8,000 RPM, High Power-to-Weight, Heavy Duty Electric Grinder Tool, Corded (DW840)
7 inch disc with 13 amp motor
1560W output
8,000 rpm no-load
12.1 lb tool weight
Keyless tool-free guard
Pros
- 13 amp 1560W output for serious metal cutting and grinding
- 7 inch disc removes material fast on heavy stock
- Keyless tool-free guard redirects sparks in seconds
- External brush caps allow field servicing
- Sealed bearings and AC/DC power for job site use
Cons
- Weighs 12.1 lb
- far heavier than 4-1/2 inch grinders
- Lower 8000 rpm makes finish work slower
- Large 7 inch disc needs more clearance and fits fewer tight spots
When the stock is thick, the argument is simple: a bigger disc cuts deeper and faster. The DW840 runs a 7 inch wheel driven by a 13 amp, 1560W motor, and that combination is the reason owners looking for heavy-duty cutting capacity rate it so highly. It chews through heavy stock in a way none of the small grinders here can match.
The 7 inch diameter gives real cut depth, which matters most on structural material: plate, I-beam, heavy pipe and stacked angle iron. It also means fewer passes per cut, which reduces the number of wheel changes and the accumulated fatigue of getting in and out of position.
Field serviceability is genuinely thoughtful. External brush caps let you replace carbon brushes without opening the tool, and the spindle lock enables a single-wrench wheel change. The AC/DC power capability makes it versatile across job sites, and the sealed bearings are built for long service life under dusty metal grinding conditions.
The tool-free keyless guard is easy to reposition, which matters because a 7 inch wheel throws noticeably more spark than a 4-1/2 inch one and you will be redirecting it constantly. The kit includes the 7 inch wheel, a Type 27 guard, a side handle and a hex key.
When the big grinder earns its keep
Structural steel work where cut depth is the deciding factor: cutting I-beams, heavy plate, thick pipe and rebar in quantity. For a fabricator or demolition contractor, this is the tool that stops jobs from being slowed down by too many shallow passes.
The 13 amp motor also makes it the right call for bulk grinding, where removing weld slag or cleaning up castings is faster at 1560W than at 900W. The output headroom is what makes it last through those sessions without overheating.
Where it falls short
At 12.1 lb it weighs more than double a small grinder, and that is a real ergonomic cost. Overhead work, ladder work and a full day of handheld grinding will tire your arms and hands in a way a 4 lb tool never will. Many owners buy a 7 inch machine for cutting and still keep a small grinder for everything else.
The 8,000 rpm is low compared with the 11,000 to 12,000 rpm of the small grinders here, so finish work and grinding take longer for the same material removal. And a 7 inch disc needs clearance that simply does not exist between a stud and a pipe, so tight corners are out of reach entirely.
How We Chose Grinders for Metal Cutting
We ranked these tools on metal work only. That means every grinder here was assessed on how it behaves against steel, iron and stainless: does the wheel keep its speed when it contacts the stock, does the tool stall on thick stock, does the wheel bind or kick, and how long does the disc last in a real cut.
Sustained torque came first. Peak no-load RPM is easy to advertise and tells you very little, because a grinder running free spins far faster than it does with a wheel in the cut. We looked for headroom between the rated speed and what the motor can hold under load.
Second was the safety electronics, because metal is where these features earn their keep. Kickback brakes, electronic clutches, restart protection, no-volt release and electronic brakes were weighted heavily, since a bind in steel is the defining hazard of this kind of work. A two-stage paddle trigger and a spindle lock were treated as quality-of-life items that matter on a full day of wheel changes.
Third was control: weight, grip diameter, handle position and vibration. Forum users consistently name vibration as the biggest source of fatigue over a long day, and grip comfort as the reason they keep reaching for a particular tool. Finally we checked bundle value, arbor compatibility and warranty length, since these affect what owning the tool actually costs you.
How to Choose an Angle Grinder for Metal Cutting
1. Start with disc diameter, because it sets your cut depth
Disc diameter is the single decision that determines what you can cut in one pass. Max cut depth is roughly the radius of the wheel minus the depth of the guard body, so bigger discs cut deeper. Approximate figures for planning: a 4-1/2 inch disc gives about 1-1/8 inches of depth, 5 inch about 1-3/16 inches, 6 inch about 1-1/2 inches, 7 inch about 1-7/8 inches and 9 inch about 2-1/2 inches.
Match that to your thickest common stock. For sheet metal, thin tube and small angle iron, 4-1/2 inch is the right answer and it is also the easiest to control. For plate and standard structural shapes, 6 inch is the sweet spot. For I-beams and heavy stock, step up to 7 or 9 inch and accept the weight.
Overbuying is a common mistake in both directions. Plenty of people buy a small grinder and never need anything larger, and just as many discover mid-project that a 4-1/2 inch wheel will not reach through the plate they just bought.
2. Corded or cordless for sustained cut-off work
For sustained cut-off work, corded is the honest answer. A corded 7 to 13 amp grinder draws continuous power from the outlet, so speed stays up as long as the cut does, and there is no pack to swap. Metal fabricators and blacksmiths report corded grinders as their daily driver for exactly this reason.
Cordless wins on reachability. No extension cord means no trip hazard, no voltage drop over a long lead, and no searching for an outlet on a roof, a ladder or inside a machine. For cutting light to medium stock, welders on site and one-handed work, cordless is the better tool. Modern brushless cordless grinders hold up far better under load than the brushed models that gave the category a bad name.
3. Amps and watts, and why they are not the same thing
Amps draw from the circuit; watts describe how hard the tool pushes. For corded grinders, amps are the useful figure: 6 amp handles light work, 7.5 amp is a solid all-rounder, 10 to 13 amp is heavy stock territory. For cordless, wattage is the better comparison, and the M18 Fuel 800W of the Milwaukee 2880-20 sits well above typical small cordless grinders.
Whichever figure you read, look for headroom above what you need. The grinders that bog are the ones with no reserve once the wheel is loaded.
4. No-load RPM versus working RPM
The sticker number is a free-spinning figure. On a real cut, RPM drops as the motor works against the load, and the amount it drops tells you how much torque is left. A 12,000 rpm grinder that falls to 5,000 under load is telling you it is at its limit; one that holds close to its rated speed is telling you it has reserve.
This is also why a 7 inch 8,000 rpm grinder can feel stronger on heavy stock than a 4-1/2 inch 12,000 rpm grinder. Bigger wheel, more leverage on the cut, deeper bite. Speed is not the whole picture.
5. Safety systems that actually stop a bind
Kickback control is the big one. An electronic clutch detects the sudden speed drop when a wheel binds and disengages, which is what stops the tool from kicking back into your arm. The DEWALT DCG413B uses a kickback brake, and the Milwaukee 2880-20 uses an electronic clutch. Neither is a luxury on metal.
An electronic brake stops a coasting wheel in seconds rather than letting it spin down for a minute, which matters if you need to put the tool down and pick up something else. Restart protection and no-volt release stop the tool restarting after a brief power loss or a drained battery. A paddle switch with lock-on is better than a slide switch for cutting, because you can release it instantly if the wheel grabs.
6. Motor type and maintenance
Brushless motors have no carbon brushes, so there is nothing to replace and they run cooler and more efficiently. That is why the DEWALT DCG413B and the Milwaukee 2880-20 lead the cordless category. Brushed motors are cheaper to build and their brushes are serviceable, which is the argument for the Bosch GWS8-45 and its Service Minder brushes that shut the tool off when maintenance is due.
7. Arbor size, guard and handle fit
Most 4-1/2 inch grinders use a 5/8-11 threaded spindle, and many accept a 7/8 inch arbor wheel with a washer. That wide compatibility is what lets you buy cut-off wheels from any brand, and it is worth checking before you commit to a tool with a proprietary mounting system. Larger 7 and 9 inch grinders use bigger arbors, which is one more reason disc size and wheel choice are linked decisions.
The guard should be adjustable with one hand and without tools if you will be switching between cutting and grinding often. The side handle should clamp securely in at least two positions, and a spindle lock plus quick-release flange saves real time when you are changing wheels several times a day.
Which Cut-Off Wheel for Which Metal
The wheel matters as much as the grinder. A cut-off wheel is built to slice by having its edge break away as it wears, which is why it should only ever be used for cutting. A grinding wheel is a solid depressed-centre wheel with a reinforced edge, designed to grind a surface and to survive side loading that would shatter a cut-off wheel.
Mild steel and rebar: a general purpose abrasive cut-off wheel is the default choice. Fast, inexpensive and disposable enough to replace when it thins out.
Stainless steel: use a wheel labelled for stainless or one with a zirconia or ceramic grain. You get a slower cut and a much longer wheel life, which pays off because stainless gouges ordinary carbon-steel wheels.
Cast iron: a diamond wheel is the right answer. Abrasive wheels load up with glassy particles and glaze quickly on cast iron, while a diamond wheel stays sharp.
Steel plate and sheet metal: a thin cut-off wheel, roughly 1 mm, for thin gauge and a thicker one for plate. Thicker wheels are more forgiving and less prone to snapping, and they cut slower.
Aluminium: a dedicated aluminium cut-off wheel. The material gums up and clogs ordinary wheels fast, and a clogged wheel heats the workpiece.
Threaded rod and bolts: small diameter wheels cut faster because the wheel edge is moving faster relative to the work, so a 4-1/2 inch wheel beats a 7 inch wheel on a 1/2 inch bolt.
Weld prep and surface work: grinding rather than cutting. Start with a coarser grit flap disc for heavy weld removal, move to a finer grit for blending, and finish with a wire cup wheel for a uniform surface.
Abrasive wheels cost little and are the right economic choice for mild steel. Diamond wheels cost several times more per wheel but last far longer on hard materials like cast iron, hardened steel and concrete, so the cost per cut often works out lower on those materials. Forum users frequently name Diablo, Makita, DEWALT and Lenox as reliable wheel brands, and the recurring complaint is about brand-locked mounting systems rather than wheel quality itself.
One thing not to do: using a cut-off wheel for grinding. It is the single most common misuse we see discussed, and it is dangerous. A cut-off wheel has no reinforced edge and is not rated for side loading or for grinding at an angle, so it can crack or shatter under a lateral force it was never built to handle. Use a grinding wheel for grinding, every time.
Angle Grinder Safety for Metal Cutting
Wear eye protection. Not just safety glasses, but a full face shield or a face shield over your glasses when cutting, because sparks and wheel fragments travel further than most people expect. Hearing protection matters too, since these tools are loud and sustained exposure adds up.
Match the wheel’s maximum RPM rating to the grinder’s rated speed, and never exceed either. A wheel rated below the tool’s speed is a fragmentation hazard. Fit the wheel the right way round and use the guard every time; the guard exists to deflect sparks and fragments away from you, not as a suggestion.
Hold the tool with two hands, keep the side handle firmly attached, and let the wheel do the work. Pressing harder on a cut-off wheel burns the edge and creates the heat that leads to binding. Approach at a shallow angle and keep the wheel moving through the cut.
Be aware of fire risk. Cutting steel throws hot sparks and molten particles that land far beyond the work itself, and they can sit in cracks in a concrete floor and smoulder. Clear the area, have an appropriate extinguisher within reach, and never cut where sparks can reach unsealed timber or plastics. Hot work in a shared shop should follow your local procedure.
On vibration, long cutting sessions put real vibration through your hand. Anti-vibration handles and side handle dampening reduce it, and taking short breaks across a shift matters more than any single feature. Anyone cutting metal daily should take hand-arm vibration exposure seriously.
Frequently Asked Questions
What is the best angle grinder for cutting metal?
The best angle grinder for cutting metal is one that pairs a motor with real torque under load, a disc diameter matched to your thickest stock, and a kickback system that disengages on a bind. For most people that is a corded 4-1/2 inch grinder between 7 and 8 amps, such as the Makita 9557PBX1 or Bosch GWS8-45, or a brushless cordless model like the DEWALT DCG413B when you need to work away from an outlet.
Should I get a corded or cordless angle grinder?
For sustained cut-off work on thick stock, corded is the better choice because speed stays up for as long as the cut does. Cordless is better for job site reachability, overhead work and lighter stock, since modern brushless cordless grinders hold speed much better than older brushed models. Many fabricators keep both.
What is the best cut-off wheel for an angle grinder?
For mild steel and rebar, a general purpose abrasive cut-off wheel is the right choice. For stainless steel, use a wheel labelled for stainless or built with zirconia or ceramic grain so it does not gouge. For cast iron, hardened steel and concrete, a diamond wheel lasts far longer and usually costs less per cut.
Is it okay to use a cut-off wheel as a grinding wheel?
No. A cut-off wheel has no reinforced edge and is not rated for side loading or for grinding at an angle, so using it to grind can make it crack or shatter. Use a grinding wheel for grinding and a cut-off wheel for cutting only. This is the most common misuse of the tool and it is a genuine safety hazard.
What size angle grinder do I need for cutting metal?
A 4-1/2 inch grinder handles sheet metal, thin tube and small angle iron with the best control and gives roughly 1-1/8 inches of cut depth. A 6 inch grinder gives about 1-1/2 inches and suits plate and standard structural shapes. For I-beams and heavy stock, move to 7 or 9 inch and accept the weight.
What metal can a grinder not cut?
An angle grinder with the correct abrasive cut-off wheel can cut mild steel, stainless steel, cast iron, rebar, aluminium and most other ferrous and non-ferrous metals. Problems come from the wheel rather than the tool: aluminium gums up and clogs an ordinary wheel, and hardened or very hard alloys need a diamond wheel. Magnesium is the exception, because the sparks and heat involved make it a serious fire risk.
Bottom Line on the Best Angle Grinders for Metal Cutting
The DEWALT DCG413B is the best angle grinder for metal cutting overall. Its brushless motor, kickback brake, two-stage paddle trigger and 3.8 lb weight make it the most capable tool here whether you are at a bench or on a roof, and its 4.8 rating across close to 9,600 reviews is the strongest combination of satisfaction and track record in this group.
Buy the Makita 9557PBX1 if you want one corded tool for everything. The metal gear housing, ball bearings, narrow barrel grip and lock-on paddle switch make it the one we would keep on the bench indefinitely. Buy the Milwaukee 2880-20 if you already run M18 batteries and need a grinder that works where there is no outlet.
For tight corners and overhead work, the Bosch GWS8-45 has the best grip, and the Metabo HPT G12SR4 is the lighter, lower-power alternative. For occasional work, the AVID POWER and SHALL grinders cover the entry level with bundles that include everything you need. When the stock is genuinely thick, the 7 inch DEWALT DW840 cuts deeper than anything else here.
Whichever one you choose, spend as much attention on the wheel as on the grinder. A fresh, correctly rated cut-off wheel will outperform a dull or wrong-type wheel in a much better machine every single time. If your cuts are long and structural, we also compared the dedicated approach in our guide to metal cutting band saws to see when a saw is the better answer for straight, repeatable cuts.