Internet #204410441

Model #2781-20

M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./5 in. Grinder with Slide Switch (Tool-Only)

  • Delivers maximum power and up to 10X longer motor life
  • Tool-free accessory change and adjustable guard
  • Fully compatible with the M18 system, featuring over 200+ tools
  • See More Details

Frequently Bought Together

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Price:
$17651

Product Overview

M18 System: performance driven, trade focused, system wide.

M18 System Metalworking Solutions

Professional grade power, extreme performance, and system compatibility.

A wide selection of M18 cordless tools and solutions lined up

200+ solutions on a single 18-volt cordless system

Featuring high performing, trade-focused solutions

Game changing products for the professional trades like Plumbing, Electrical and many others

MILWAUKEE M18 System

Game changing products for the professional trades like Plumbing, Electrical and many others

Man using an M18 FUEL SUPER SAWZALL Reciprocating Saw to cut wood beam.

Performance Driven

Delivers the best-in-class performance

Three trade professionals in safety gear on red background

Trade Focused

Milwaukee is dedicated to the trades - providing professional solutions on one platform

Milwaukee's power tools are part of the M18 System, featuring over 200 cordless solutions.

System Compatibility

Tools on the M12 System – Fit all M12 Batteries

M12 System tools offer high performance motors, REDLINK intelligence, and REDLITHIUM batteries.

M12 Cordless Tool Technology

Provides tradesmen with unmatched levels of performance, protection, and productivity.

A man in jeans and gray t-shirt wearing work gloves uses an M18 FUEL Braking Grinder on metal as sparks fly.

Grinders

Small to large angle grinders all on the same battery platform including the M18 FUEL 4-1/2" and 6" Grinder.

A man wearing work gloves uses the M18 FUEL Magnetic Drill to cut a hole in steel beam.

Magnetic Drills

The M18 FUEL 1-1/2" Magnetic Drill delivers the strongest hold on 1/4” steel for a safer drilling environment

Man wearing work gloves uses the M18 FUEL Dual-Trigger Band Saw to cut a metal pipe.

Band Saws

The widest range of cordless band saws including the M18 FUEL Deep Cut Band Saw

Man wearing work gloves makes a straight cut in sheet metal with an M18 Doule Cut Shear.

Metal Cutting Circ Saws

The M18 FUEL 8" Metal Cutting Circular Saw delivers up to 120’ of cutting corrugated decking per charge

Man wearing work gloves makes a straight cut in sheet metal with an M18 Doule Cut Shear.

Shears

Man wearing work gloves makes a straight cut in sheet metal with an M18 Double Cut Shear.

Two M18 RADIUS Site Lights sit on job site floor illuminating the workspace.

Lighting

The M18 RADIUS Site Light delivers 60° coverage with 9,000 lumens.

The world's first cordless grinder delivers the power of a corded grinder with up to 2X more run time and up to 10X longer motor life. The M18 FUEL 4-1/2 in./5 in. Grinder supplies maximum sustained power to complete the toughest grinding, surface preparation and cutting applications. The POWERSTATE Brushless Motor provides up to 10X longer motor life and lower cost of ownership. The M18 REDLITHIUM XC5.0 Battery Pack (not included) delivers up to 4X more run time and 20% more power. The grinder features REDLINK PLUS Intelligence, the most advanced system of cordless power tool electronics, for maximum performance. The 18-Volt lithium-ion grinder's thin body design gives it optimized balance to rest easily in your hands. Tool-free accessory changes and guard adjustments mean less downtime during work. The grinder is built with the same tool body, Gearing system and anti-vibration side handle as Milwaukee's high performance corded grinders for maximum durability on the job. Grinding wheel sold separately.
  • POWERSTATE brushless motor: delivers maximum power and up to 10X longer motor life
  • REDLINK PLUS intelligence provides optimized performance, electronic clutch, and overload protection using total system communication between tool, battery and charger
  • REDLITHIUM XC 5.0 battery pack (not included) provides superior pack construction, electronics, and performance to deliver 2X more run-time and more work over pack life
  • Power to grind: world's first cordless grinder with corded performance
  • DURABILITY: same metal housing and Gearing system as legendary high performance corded grinders
  • 100% tool free: make all accessory changes and guard adjustments without a wrench for increased productivity
  • Slide switch: reduces user fatigue
  • Tool-only (no battery or charger included)
  • Compatible with all M18 batteries
  • 5-year tool warranty
  • Arbor size: 5/8 in. to 11 in.
  • Shop All Milwaukee Tools






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Info & Guides

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M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./5 in. Grinder with Slide Switch (Tool-Only)
M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./6 in. Grinder with Slide Switch with Lock On (Tool-Only)M18 4-1/2 in. Cordless Cut-Off/Grinder With M18 6-1/2 in. Cordless Circular SawM18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./5 in. Grinder with Paddle Switch Kit One 5.0 Ah Batteries
BrandMilwaukeeMilwaukeeMilwaukeeMilwaukee
NameM18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./5 in. Grinder with Slide Switch (Tool-Only)M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./6 in. Grinder with Slide Switch with Lock On (Tool-Only)M18 4-1/2 in. Cordless Cut-Off/Grinder With M18 6-1/2 in. Cordless Circular SawM18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./5 in. Grinder with Paddle Switch Kit One 5.0 Ah Batteries
Price
$17651
$21900
$23800
$31900
Ratings
(245)
(52)
(502)
(650)
Cordless/ CordedCordlessCordlessCordlessCordless
Wheel Diameter (in.)5614.5 in5 in
Power Tool FeaturesAdjustable Handle Position,Brushless,No Tool Wheel ChangeBlade Guard System,Brushless,LED Light,Variable SpeedAdjustable Handle Position,No Tool Wheel Change,Spindle LockCase Included
Amperage (amps)00 A00
Voltage (volts)18181818
Battery Amp HoursNo BatteryNo Battery0.05 Ah
Voltage (v)18v18v
Motor TypeBrushlessBrushlessBrushedBrushless
View ProductView ProductView ProductView Product

Specifications

Dimensions

Product Depth (in.)
3.27
Product Height (in.)
8.58
Product Width (in.)
15
Wheel Diameter (in.)
5

Details

Amperage (amps)
0
Arbor Size
0.625
Batteries Included
No
Battery Amp Hours
No Battery
Battery Power Type
Lithium Ion
Battery Size
18-volt,M18
Battery/Charger
Tool Only
Battery/Charger
Tool Only
Charger Included
Charger Not Included
Color Family
Red
Condition
New
Cordless Tool Type
Angle Grinder
Cordless/ Corded
Cordless
Electronic Speed Control
Yes
Grinder Switch Type
Sliding Switch
Grinding Wheel Included
No
Included
Attachments Included
Maximum Speed (rpm)
8500
Motor Type
Brushless
Number of Batteries Included
0
Number of Tools Included
1
Number of Total Batteries Included
0
Power Tool Features
Adjustable Handle Position,Brushless,No Tool Wheel Change
Product Weight (lb.)
5.8
Returnable
180-Day
Spindle Lock
Yes
Tools Product Type
Power Tool
Variable Speed
No
Voltage (v)
18v
Voltage (volts)
18

Warranty / Certifications

Certifications and Listings
UL Listed
Manufacturer Warranty
5 year tool

Questions & Answers

19Questions26Answers

Is this a slide switch or slide lock?

Asked by ToDoList October 31, 2018
5
Answers

The switch is more of a slide lock. You have to push down and slide forward. It will not let you simply slide the switch on. Once it is on it remains on until you move the switch back, the switch does not return on its own.

Is there an accessory that I can use to utilize this as a car polisher?

Asked by Francisco September 24, 2018
5
Answers

i do not think so it is a 4 1/2" grinder

I'm an electrician...don't know a lot about grinders. Do I want one with a "paddle switch" or one that "locks-on"?

Asked by Edco March 11, 2016
2
Answers

As an electrician, I use mine primarily for cutting, so chose the lock-on.

Hello, do you sell EU version on the charher? 230Volt?

Asked by Hoogan November 28, 2017
2
Answers

no

Why is this model not available in stores?

Asked by mjl June 13, 2016
2
Answers

I'm assuming because for some reason people love that paddle switch...me on the other hand can't stand it. I ordered my on HDepot and got it 2 or 3 days later delivered free to my house.

Which model should i get?

Asked by Tileguy November 3, 2018
2
Answers

Slide Switch all day, hands down(IMO) The paddle makes it a bit combersome if your working material in one hand grinder in the other etc. Also with the slide switch you can adjust your hands on the grinder for tight spaces/ accuracy/control and not have to worry about keeping the paddle pressed.

Sanding pads

Asked by JP December 24, 2015
2
Answers

there are grinding pads for metal

Does this work with the Millwaukee dust control kit?

Asked by Johnathan March 10, 2017
2
Answers

no

What is the RPM on this tool?

Asked by Brig March 3, 2016
2
Answers

should be on the spec sheet on line

can this grinder accept 7/8 arbor cutting wheels and grinding wheels? if not is there a adapter y...

Asked by jbird7011 May 21, 2017
2
Answers

yes

M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 4-1/2 in./5 in. Grinder with Slide Switch (Tool-Only) - page 2

Customer Reviews

  • 245 Customer Reviews
  • 4.9 out of 5 stars overall
96% of customers recommended.
Overall Ratings
5star-icon(212)
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Dayton, Ohio
I’m new to the M18 Fuel Line.
Customer review from milwaukeetool.com logo
I goer started with the usual Drill and Driver kit, and have since added nearly a dozen other tools. I purchased this to clean wrought iron railing around my porch so I could re-paint it. Wow. I am so impressed with the continuous power! I have 2 5.0 and 1 4.0 battery so I have been able to go for about 100 min full steam. So glad to have this in my tool box!!
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Central,Pa
Best cordless grinder yet !
Customer review from milwaukeetool.com logo
Used it for grinding and cutting both light and heavy steel. You can really lay into steel with this grinder and it won’t stop or shut off. I’ve had a Makita and a dewalt. They were both junk. There is no comparison. It will eat through low amp hour batteries if your using it hard, but you can swap them out and keep going. I bought this because I burnt up my corded grinder and I glad I took the chance to try another cordless. Worked great for building my flatbed.
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Québec
Le meilleur pour les travailleurs
Customer review from milwaukeetool.com logo
Super performant,grande autonomie Abordable pour les travailleurs . Jusqu’à présent les outils à batterie Milwaukee sont,à mon avis,de loin supérieurs à toutes concurrences.
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0
Great tool
Customer review from milwaukeetool.com logo
I use it for everything from cutting to buffing and polishing. Powerful unit. Maybe bulky for some jobs. The one piece of advice I’d offer is never leave the battery in the tool when not in use. My tool bag got bumped and by the time it got shut off it had cut through and extension cord, a portable light, the tool bag and was working on the pavement.
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0
Best Available Cordless Grinder
Quality :
5
Value :
5
I was very excited to discover Milwaukee is now offering their cordless saws and grinders in the M18 Fuel Line of tools. The Milwaukee 2781-20 is my first cordless grinder, and I have been very impressed with it’s performance and features. The Milwaukee 2781 Grinder has a very compact design, yet the ergonomics are excellent and it has very low vibration when using the tool. The new brushless motor provides plenty of power and extended battery use. The unit comes with a Type 27 Wheel Guard (for grinding), and more importantly a Type 1 (enclosed) Wheel Guard, which is mandatory for using flat metal cutting wheels. The wheel guards have 5 adjustment settings (tooless), and the slide switch has a cruise control setting. I highly recommend the new Milwaukee 2781 for anyone in the market for a cordless grinder, and appreciates having the best available technology. You will not be disappointed.
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Sudbury,Ont
I would buy this product again
Customer review from milwaukeetool.com logo
I like this fuel grinder it like use a corded grinder. I recommend the fuel grinder and I would not waist your money on the non fuel
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Jacksonville, IL
Powerful and comfortable!
Customer review from milwaukeetool.com logo
I use this for various household fixes and also hobby projects. Its plenty powerful. Using a 5ah battery, I rarely have to switch batteries. Blades are super simple and quick to change. Case is extremely handy for transporting. Although, the grinder has to be in the case just right for the case to shut. It is comfortable but can get a little heavy if using for long periods. Highly recommend!
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South Carolina
Outstanding Products Very Great Quality!
Customer review from milwaukeetool.com logo
Milwaukee makes great tools. I am a desiel heavy equipment field tech so portable tools are a must for me. The grinder i use for cutting off old bolts grinding them off i even have a wire wheel for those rusty bolts. I have impacts 1/2 and 3/8 ,ratchets, drills etc.
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Rating provided by a verified purchaser...
Rating provided by a verified purchaser
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Rochester new york
It works
Customer review from milwaukeetool.com logo
I use this grinder for hvac Install. Cuts through metal pretty well. Only thing to say negative is it is kinda oddly shaped so it takes a minute to get used to. Also sometimes when guard if you turn it will fall off and you have to take the wheel off to fix it. Other than that tho its great
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