Quick Answer
Milwaukee 2980-20 M18 FUEL 4-1/2 in. - 6 in. Braking Grinder

The Milwaukee 2980-20 M18 FUEL is the best angle grinder for cutting rebar at $234 — AUTOSTOP kickback protection, brushless power that rivals corded grinders, and the cordless freedom that job site rebar work actually needs.

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Methodology: Products selected and ranked using aggregated expert reviews, verified customer ratings, and price-to-performance analysis. Learn about our research process | Last updated: April 2026

At a Glance

#ProductAwardPriceScore
1 Best for Heavy Rebar Cutting $229
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9.2
2 Best for Extended Cutting $94
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9.0
3 Best Value Cordless $67
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8.6
4 Best Value Corded $45
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8.4
5 Best Budget $36
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7.8

Angle Grinder for Cutting Rebar (2026) Buying Guide

Best Angle Grinder for Cutting Rebar (2026)Photo by Swastik Arora / Pexels

Cutting rebar is one of the most demanding angle grinder tasks — you're cutting hardened steel under tension, often at awkward angles in a concrete forming project. The wrong grinder stalls, overheats, or kicks back dangerously. The right one cuts through #4 rebar in under 5 seconds, day after day, without drama.

What Makes Rebar Cutting Different From Other Grinding

Rebar is work-hardened steel, typically ASTM A615 Grade 60. Unlike mild steel plate or automotive parts, rebar's hardness increases under deformation — meaning as you're cutting it, the material near the cut zone gets harder. This combination of sustained cutting load and material hardness puts maximum stress on your motor, bearings, and gear train. This is why grinders that work fine for grinding concrete or metal prep fail on continuous rebar cutting: they weren't designed for sustained high-load cutting, only intermittent grinding.

Disc Selection: Metal vs. Steel vs. Diamond

Use a Type 1 (flat) metal cutting disc, not a grinding disc, for rebar. Metal cutting discs are thinner (0.045-inch) and optimized for through-cuts. Standard grinding discs (1/4-inch) are for surface grinding and will overheat and glaze quickly on rebar. Never use a diamond blade for rebar — diamond blades are for masonry and will be destroyed immediately on steel. For volumes under 20 cuts, an inexpensive aluminum oxide disc works fine. For heavy production cutting, upgrade to a reinforced zirconia alumina disc for 3-4x more cuts per disc.

Cutting Steel - Diablo Cut-Off Disc vs Ridgid Metal Diamond
Cutting Steel - Diablo Cut-Off Disc vs Ridgid Metal Diamond Blade
Milwaukee 2980-20 M18 FUEL 4-1/2 in. - 6 in. Braking Grinder
Milwaukee 2980-20 M18 FUEL 4-1/2 in. - 6 in. Braki...
$229.00
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Paddle Switch vs. Trigger Switch: The Safety Difference

A paddle switch (like the DEWALT DWE402) requires your full hand to grip the handle to maintain operation. Release your grip — the tool stops. A standard trigger switch stays on after you lock it. For rebar cutting, where kickback can throw the tool or your hand, paddle switches are significantly safer. OSHA and most safety programs require paddle switches for angle grinders in commercial construction. If you're cutting more than occasional rebar on a job site, the paddle switch is the right choice.

How We Selected for Rebar Cutting

Selection criteria for rebar cutting angle grinders focuses on performance with #3 rebar (3/8-inch) and #4 rebar (1/2-inch) — the most common residential specifications. Key ranking factors include cutting speed, disc heat management, motor durability, kickback protection behavior, and disc life per session. Kickback protection systems (DEWALT E-clutch, Milwaukee AUTOSTOP) are assessed based on manufacturer specifications and verified field reports. Prices reflect current Amazon listings.

The 5 Best Angle Grinders Of 2024 || Angle Grinder (Buying G
The 5 Best Angle Grinders Of 2024 || Angle Grinder (Buying Guide)

Cordless vs. Corded for Rebar on a Job Site

Job site rebar cutting often happens before electrical infrastructure is in place — which makes cordless grinders like the Milwaukee 2980-20 genuinely more practical than their corded competitors. A high-quality 18V+ brushless angle grinder now delivers sustained rebar cutting performance that matches or exceeds 7.5-amp corded grinders for typical runs of cuts. If you're cutting 100+ pieces per day, a corded grinder with paddle switch remains the most economical choice. For typical residential concrete work (10-50 cuts per day), cordless is the practical choice.

Cut Rebar Like Butter - Cheap And Easy Method With Hand Tool
Cut Rebar Like Butter - Cheap And Easy Method With Hand Tools

See detailed reviews below ↓

Our Top Pick
Milwaukee 2980-20 M18 FUEL 4-1/2 in. - 6 in. Braking Grinder w/No-Lock Paddle Switch (Tool Only)
Best for: Professionals who need a powerful cordless angle grinder for metal cutting and grinding in positions where cord management limits workflow

“At $234, the Milwaukee M18 FUEL 2980-20 delivers maximum cordless power via its POWERSTATE brushless motor and accepts both 4.5-inch and 6-inch discs — a rare flexibility on a cordless platform. The n”

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What we like

  • M18 FUEL brushless motor delivers maximum power delivery for sustained metal cutting, grinding, and surface preparation in a cordless form factor
  • No-lock paddle switch stops the disc immediately when the hand releases — an important safety feature when the disc catches unexpectedly in a cut
  • Variable disc compatibility from 4.5 to 6 inches handles both standard cutting and larger-diameter surface grinding without changing tools
  • Compatible with the full Milwaukee M18 platform — battery shared with 200+ M18 tools across the full system

Watch out for

  • Tool only — M18 battery purchased separately
  • Heavier than non-FUEL alternatives
  • 6-inch disc requires additional guard not included
Skip if: Hobbyists who grind metal occasionally — a corded angle grinder provides unlimited runtime at significantly lower cost for infrequent use
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Read Full Analysis

Milwaukee 2980-20 M18 FUEL Angle Grinder at $234 earns the top rank on this rebar-cutting comparison with a combination corded alternatives at $36-94 can't offer: cordless mobility with brushless motor power that sustains torque under load. Cutting rebar is sustained, high-resistance work — standard brushed motors heat up and throttle output over extended cuts. The POWERSTATE brushless motor maintains consistent torque through the cut without power degradation. The no-lock paddle switch is the safety feature that specifically justifies the premium for rebar work: when a cutting disc catches in dense steel — a common occurrence — the no-lock design stops the disc the moment your hand releases. A standard lock-on switch doesn't. The 4.5-to-6-inch disc compatibility handles both cutting discs and surface grinding without a tool swap. At $234 tool-only, the DEWALT corded 11-amp at $94 and DEWALT 20V MAX at $54.99 are dramatically cheaper. The cordless premium is most defensible if you already own M18 batteries from other Milwaukee tools — the M18 platform shares batteries across 200+ tools, which significantly reduces the effective cost per addition. For infrequent single-use, a corded option is harder to argue against on cost alone. Choose Milwaukee M18 FUEL if cordless mobility, sustained power under load, and the no-lock paddle safety feature are real requirements. The DEWALT corded at $94 is the practical pick for occasional use where cord access is not a constraint.

Full Specs & Measurements
Voltage18 Volts
Api TitleMilwaukee 2980-20 M18 FUEL 4-1/2 in. - 6 in. Braking Grinder w/No-Lock Paddle Switch (Tool Only)
Power SourceBattery Powered
Material TypeMetal
Api Refreshed At2026-05-19T15:16:05Z
Maximum Rotational Speed9000 RPM
Item Dimensions L X W X H12.45"L x 7.08"W x 11.41"H
Also Excellent
DEWALT Angle Grinder, 4.5 Inch, 11 Amp, 11,000 rpm, With Paddle Switch, Ergonomic Compact Design Grinder Tool (DWE402)
Best for: Workshop users who need reliable corded grinder power for sustained grinding without battery concern

“At $94, the DEWALT DWE402's 11-amp corded motor provides unlimited runtime for high-volume rebar cutting without battery recharge interruptions. The paddle switch stops the disc immediately on release”

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What we like

  • 11-amp corded motor for unlimited runtime
  • Paddle switch for improved operator safety
  • Low-profile gear case fits in tight grinding positions
  • One-touch guard for quick angle adjustment

Watch out for

  • Corded limits working distance from outlet
  • Heavier and bulkier than cordless alternatives
  • Extension cord required for job site distance
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Read Full Analysis

DEWALT DWE402 is the 11-amp corded option for high-volume rebar cutting — unlimited runtime from a constant power source eliminates the battery recharge interruptions that slow continuous cutting sessions on the jobsite. The 11-amp motor maintains consistent disc speed under the friction load of cutting through structural steel, where lower-amp motors bog down and stall. The paddle switch stops the disc immediately on release — the safety mechanism that matters most when a cutting disc catches unexpectedly in rebar and the tool tries to kick. The low-profile gear case reaches into tight cutting positions, and one-touch guard adjustment makes repositioning fast between cuts without tools. At $94.00, DEWALT DWE402 is the second-highest price on this page — $140 below the Milwaukee M18 FUEL at $234.00, which is the cordless option. The DEWALT DCG413B cordless brushless at $54.99 and Makita GA4534 at $45.99 and SKIL at $36.53 are the lower-cost alternatives. As the premium corded option with 11-amp output and paddle switch safety, the DWE402 sits at the professional-grade corded tier. Choose DEWALT DWE402 for extended rebar cutting sessions where unlimited corded runtime is the priority and the work location has accessible power — the 11-amp motor handles sustained steel cutting loads without battery management overhead. Skip it for jobsite mobility away from outlets: the DEWALT DCG413B at $54.99 or Milwaukee M18 FUEL at $234.00 provide cordless operation where power access is limited.

Full Specs & Measurements
Voltage120 Volts
Wattage1320 watts
Api TitleDEWALT Angle Grinder, 4.5 Inch, 11 Amp, 11,000 rpm, With Paddle Switch, Ergonomic Compact Design Grinder Tool (DWE402)
Horsepower1.80
Power SourceCorded Electric
Material TypeMetal, Plastic
Api Refreshed At2026-05-19T15:02:58Z
Included Components2-position side handle | 4-1/2" One-Touch (T27) Guard | wrench
Maximum Rotational Speed11000 RPM
Item Dimensions L X W X H15.63"L x 5.94"W x 4.81"H
Manufacturer Warranty Description3 year limited manufacturers warranty
Best Budget
PORTER-CABLE Angle Grinder Tool, 4-1/2-Inch, 7.5-Amp (PC750AG)
Best for: Contractors and metal fabricators who need cordless convenience for cutting, grinding, and surface prep without giving up the safety features that serious grinder work requires
Based on 2,772 verified reviews + 1 expert source

“At $54.99 (tool only), the DEWALT DCG413B's brushless motor runs 57% longer per charge than brushed models, and the E-Clutch electronic brake stops the disc in under 2 seconds if it binds in rebar — a”

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What we like

  • Brushless motor runs 57% longer per charge than brushed grinders — significantly more cutting, grinding, and surface prep before swapping to a second battery
  • No cord provides true portability for metalwork, tile cutting, and surface prep in locations without accessible power outlets on the job site
  • Electronic brake stops the disc in under two seconds when you release the trigger — a safety feature that brushed grinders typically omit
  • Kickback detection stops the tool instantly if the disc catches and binds, preventing the torque spike that can wrench the grinder out of your grip
  • All DeWalt 20V MAX batteries power this grinder — matches the batteries across your existing DeWalt drill and driver setup without additional purchase

Watch out for

  • Tool only (battery sold separately)
  • Battery run-time limits very high-volume cutting
  • Heavier than corded models
Skip if: Grinding operators running grinders continuously for hours — corded models have no runtime limits and cost less than the tool plus battery combination for sustained stationary shop work
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DEWALT's DCG413B at $54.99 stands out as the only cordless option on this page with both kickback detection and an electronic brake — two safety features that matter when a cutting disc binds in rebar mid-cut. The brushless motor extends runtime 57% over brushed alternatives, and the 20V MAX battery platform means any DeWalt battery from a drill or driver powers it directly. The electronic brake stops the disc in under two seconds on trigger release, compared to free-coasting brushed grinders that keep spinning several seconds after you let go. On this page, the DCG413B at $54.99 fills the gap between the SKIL budget corded option at $36.53 and the DEWALT corded DWE402 at $94. The Milwaukee M18 FUEL at $234 is the professional cordless benchmark — it adds variable disc sizing and deeper M18 ecosystem integration, but at four times the DCG413B's price. For buyers who already own 20V MAX batteries and need cordless access to rebar on a job site, the DCG413B offers those safety features at a price that doesn't demand a new battery investment. Buy DEWALT DCG413B if you're already in the 20V MAX ecosystem and need cordless flexibility with kickback protection for rebar cutting. Skip it if you're cutting rebar for extended sessions in a fixed location — the corded DEWALT at $94 offers unlimited runtime and more amperage for sustained production work.

Full Specs & Measurements
Rpm8000
MotorBrushless
Voltage120 Volts
Wattage900 watts
E ClutchYes
Api TitlePORTER-CABLE Angle Grinder Tool, 4-1/2-Inch, 7.5-Amp (PC750AG)
Disc Size4.5 to 5 inches
Power SourceCorded Electric
Material TypeMetal
Wheel Diameter4.5 Inches
Api Refreshed At2026-05-19T14:53:39Z
Kickback DetectionYes
Maximum Rotational Speed10000 RPM
Item Dimensions L X W X H17.1"L x 6"W x 4.69"H
Manufacturer Warranty Description3 year limited; 1 year free service; 90 DayMoney Back Guarantee
Best Budget
BLACK+DECKER Angle Grinder Tool, 4-1/2-Inch, 6.5-Amp (BDEG400)
Best for: Fabricators who need precise disc speed control for different materials
Based on 7,347 verified reviews + 1 expert source

“The Makita GA4534 at $45.99 uses constant-speed control to maintain RPM under heavy load — a key advantage when cutting through dense rebar where motor bog-down causes disc bind. Soft start and labyri”

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What we like

  • Constant-speed control maintains RPM under heavy load
  • Labyrinth construction seals motor from dust
  • Soft start reduces startup torque for better disc life
  • Lock-on/off switch with safety lock
  • Recessed barrel grip for low-profile control

Watch out for

  • Lock-on switch requires deliberate action to stop vs paddle
  • Slightly less maximum power than DEWALT
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Makita's GA4534 at $45.99 earns the "Best Value Corded" spot through three features that lower-priced grinders skip: constant-speed control that holds disc RPM steady under load, labyrinth-construction dust sealing that protects the motor from metal filings, and soft-start circuitry that reduces startup torque jerk and extends disc life. The recessed barrel grip lowers your hand's center of gravity for better control during sustained rebar cuts, and the lock-on/off switch with safety lock prevents accidental activation. Compared to the SKIL 9296-01 at $36.53 just below it on this page, Makita's $9 premium buys meaningful durability upgrades: the dust sealing alone extends motor life significantly in metalworking environments. The DEWALT corded DWE402 at $94 more than doubles the price and steps up to 11 amps, but for occasional to moderate rebar cutting, Makita's 6-amp motor handles the task competently. If you're already in the DeWalt or Milwaukee battery ecosystem, the DCG413B at $54.99 is a closer cordless alternative for similar money. Buy Makita GA4534 if you want professional corded durability features at a budget-adjacent price and don't already have a DeWalt or Milwaukee battery system to leverage. Skip it for high-volume production cutting where the DEWALT's 11-amp motor and extended runtime deliver measurable throughput advantages.

Full Specs & Measurements
Rpm11000
Amps10
Weight4.4 lbs
Voltage120 Volts
Wattage800 watts
Api TitleBLACK+DECKER Angle Grinder Tool, 4-1/2-Inch, 6.5-Amp (BDEG400)
Disc Size4.5 inches
Soft StartYes
Power SourceCorded Electric
Material TypeBlend
Constant SpeedYes
Api Refreshed At2026-05-19T15:02:59Z
Included Components4 1/2" Small Angle Grinder | Metal Grinding Wheel | Spanner Wrench | Wheel Guard
Maximum Rotational Speed10000 RPM
Item Dimensions L X W X H12.5"L x 5.19"W x 4.63"H
Manufacturer Warranty Description2 year limited manufacturers warranty
Best Budget
AVID POWER Angle Grinder 7.5-Amp 4-1/2 inch Electric Grinder Power Tools with Grinding Wheels, Cutting Wheels, Flap Disc and Auxiliary Handle for
Best for: DIYers who need a capable angle grinder for occasional cutting and grinding
Based on 6,128 verified reviews + 1 expert source

“At $36.53, the SKIL 9296-01's 7-amp motor handles most DIY rebar cutting and grinding tasks, and the spindle lock makes disc changes tool-free. The slide switch (not a paddle) means the disc won't sto”

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What we like

  • Under $40
  • 7-amp motor sufficient for most DIY cutting and grinding
  • Spindle lock for tool-free disc changes
  • Adjustable guard
  • Side handle included

Watch out for

  • No paddle switch (slide switch)
  • Less powerful than professional models
  • Not suitable for sustained heavy-duty metal fabrication
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Read Full Analysis

SKIL's 9296-01 at $36.53 is the most accessible entry point for angle grinding on this page: a 7-amp corded motor, spindle lock for tool-free disc swaps, adjustable guard that repositions without tools, and a side handle included in the box. For DIYers cutting through occasional rebar, fence posts, or bolts, the 7-amp motor handles standard 4.5-inch cutting discs without issue, and the included hardware covers the basic setup without extra purchases. At the bottom of a page that ranges up to the Milwaukee M18 FUEL at $234, SKIL competes on price alone — and that's a legitimate strength for low-frequency use. The Makita GA4534 at $45.99 is only $9 more and adds constant-speed control plus dust sealing, which is worth it for anyone cutting metal more than occasionally. The DEWALT cordless at $54.99 adds kickback detection and an electronic brake for safety in awkward positions. SKIL omits both, so disc binding on a stuck rebar cut demands more user awareness. Buy SKIL 9296-01 if your rebar cutting is occasional DIY work and you want to spend as little as possible on a functional tool. Skip it for regular or job-site cutting — the Makita at $45.99 adds durability features that pay off quickly in a metalworking environment.

Full Specs & Measurements
Rpm11500
Amps7
SwitchSlide
Weight4.5 lbs
Spindle5/8"-11 thread
Voltage120 Volts
Wattage900 watts
Api TitleAVID POWER Angle Grinder 7.5-Amp 4-1/2 inch Electric Grinder Power Tools with Grinding Wheels, Cutting Wheels, Flap Disc and Auxiliary Handle for Cutting, Grinding, Polishing & Rust Removal - Dark Red
Disc Size4.5 inches
Horsepower900 Watts
Power SourceCorded Electric
Material TypeAcrylonitrile Butadiene Styrene, Aluminum
Api Refreshed At2026-05-19T15:23:19Z
Included Components1 x 7.5 Amp 4-1/2-inch Angle Grinder, 1 x Flap Disc; 1 x Side Handle; 1 x Spanner, 1 x Wheel Guard; 2 x Carbon Brushes, 2 x Metal Cutting Wheels, 2 x Metal Grinding Wheels
Maximum Rotational Speed12000 RPM
Item Dimensions L X W X H11.02"L x 2.76"W x 2.76"H

Frequently Asked Questions

What disc do I use to cut rebar with an angle grinder?
Use a Type 1 (flat profile) metal cutting disc, 4.5-inch diameter, 0.045-inch thick. Never use a grinding disc — it's designed for surface work, not through-cuts. Aluminum oxide discs work for occasional cutting; zirconia alumina discs last 3-4x longer for production rebar cutting.
What size angle grinder for cutting rebar?
A 4.5-inch angle grinder is the standard for rebar cutting. It provides the right disc diameter for #3 and #4 rebar (the most common sizes) with manageable tool weight and size. Larger 6-inch or 7-inch grinders offer no advantage for rebar and are harder to control in tight spaces.
Is cutting rebar with an angle grinder safe?
Yes, with proper precautions: always wear a full face shield (not just safety glasses — metal sparks travel far), secure the rebar so it won't move during cutting, use a paddle switch grinder if available, and never use a damaged or expired disc. The Milwaukee 2980-20 and DEWALT DWE402 both include electronic kickback protection for added safety.
How fast can an angle grinder cut rebar?
A quality 4.5-inch grinder cuts #3 rebar (3/8-inch) in 3-5 seconds and #4 rebar (1/2-inch) in 5-10 seconds. Slower cuts usually mean a worn disc, insufficient motor power, or the disc is wrong for the application. Replace your disc when cuts start taking noticeably longer.

How We Analyze Products

We analyze Amazon review data — often thousands of reviews per product — to surface patterns that individual buyers miss. Our process aggregates star ratings, review counts, and buyer sentiment at scale, identifying which strengths and weaknesses appear consistently across the largest review samples available. The 16,247+ reviews analyzed on this page represent real verified-purchase feedback from Amazon buyers.

Each product earned its placement through data: total review volume, average rating, and the specific praise and complaints that repeat most often across buyers. No manufacturer paid for placement on this page. Products appear here because buyers endorsed them at scale, not because a company asked us to feature them.

We use AI to summarize review sentiment — not to fabricate opinions, but to condense what thousands of buyers actually wrote into a readable format. The pros and cons you see reflect the most common themes found in verified purchaser reviews, paraphrased for clarity. We do not claim to have accessed Reddit, YouTube, or specific publications in generating these summaries.

Prices shown reflect Amazon pricing at the time this page was last generated. Click “See Today’s Price” to get the current live price on Amazon. Read our full methodology →

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