Milwaukee 2780-20 M18 FUEL Lithium-Ion 4-1/2 in./5 in. Paddle Switch Grinder (Tool Only)

Milwaukee Model: miln2780-20
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Milwaukee 2780-20 M18 FUEL Lithium-Ion 4-1/2 in./5 in. Paddle Switch Grinder (Tool Only) Milwaukee Model: miln2780-20
price for vip customer


Product Features & specs :

M18 FUEL Lithium-Ion Paddle Switch Grinder performs like a corded grinder

Better than Corded

Performs like a corded tool, minus the cord (battery and charger sold separately)

M18 FUEL Lithium-Ion Paddle Switch Grinder provides more run-time per charge

Brushless Motor

Long run time when paired with REDLITHIUM batteries (battery and charger sold separately)

M18 FUEL Lithium-Ion Paddle Switch Grinder has the same durability as corded grinders

Built to Last

Metal housing ensures its long lifespan (battery and charger sold separately

Milwaukee 2780-20 M18 FUEL Lithium-Ion 4-1/2 in./5 in. Paddle Switch Grinder (Tool Only)

Run up to 2X longer with the Milwaukee 2780-20 M18 FUEL 4-1/2 in. - 5 in. Grinder with No-Lock Paddle Switch. Powered by Milwaukee REDLITHIUM batteries (sold separately), this cordless grinder delivers plenty of runtime to tackle remote jobs where power is difficult to come by. This brushless grinder's motor spins the tool at 8500 RPM, making quick work of cutting, grinding and surface preparation. Users can utilize all common small angle grinder accessories compatible with a 5/8 in. - 11 arbor, and the tool-free guard delivers quick adjustments. This cordless grinder features a slim handle design with a large paddle switch for comfort, while the no-lock paddle is fully OSHA compliant. Constructed using many components found in Milwaukee's durable corded grinders, this cordless angle grinder is built to last.
  • POWERSTATE brushless motor delivers 8500 RPM of grinding and cutting speed and the power of a corded grinder
  • Utilizes the same metal housing and gearing system as Milwaukee high performance corded grinders for ultimate durability
  • REDLINK PLUS Intelligence optimizes performance and monitors tool to prevent damage from overload conditions
  • Large no-lock paddle ensures comfort during long grinding and cutting applications and is fully OSHA compliant
  • Tool-free guard adjusts with ease
  • The world's first cordless grinder that delivers the performance of a corded grinder
  • Compatible with all M18 REDLITHIUM batteries
What’s Included:
  • M18 FUEL 4-1/2 in. - 5 in. Grinder with No-Lock Paddle Switch - 2780-20
  • (1) 5 in. Type 27 Guard
  • Flange Nuts
  • (1) Spanner Wrench
  • Battery and charger sold separately
Power Source
Bluetooth Compatibility
Motor Type
UL Safety
Wheel Diameter
5 in
No-Load Speed (RPM)
Spindle Thread
5/8 in - 11 in
CSA Safety
Switch Settings
Wifi compatibility
Batteries Included
Variable Speed
Switch Type
No-Lock Paddle
Battery Type
Case Included
Arbor Size
5/8 in - 11 in
Charger Included
ETL Safety
Battery System
15 in.
3.27 in.
8.58 in.
5.8 lbs.
Warranty Term
5 Year

Reviews :

4.7 / 5.0
538 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend this product?
Yes (25)
Easy To Use (24)
Powerful (22)
Ergonomic Design (20)
Lightweight (2)
Heavy (1)
Loud (1)
Best Uses
Home Repair (2)
Jobsite (2)
Frequent Use (1)
Heavy Duty Requirements (1)
Excellent Tool, Excellent Quality!
Great for cutting or grinding, I primarily use it for quick precise wood carvings. Great tool, but it will eat up batteries
August 23, 2020
Originally posted at
Super Grinder/ Cut Off Tool
All my tools are Milwaukee 12 and 18 volt so when I had the opportunity to purchase the 2780 I did. I have used it a couple of times since purchasing it and like every other Milwaukee tool I have, it is great. Love the power it has. The paddle switch is awesome
August 22, 2020
Originally posted at
This tool works as hard as I do.
This is actually the 3rd one I've bought. The 1st one I bought had many, many, many miles on it before it finally quit (5 years later .
These M18 FUEL models do an amazing amount of work in truly the harshest conditions. I've had mine in the rain (many times), extreme cold conditions, extreme heat conditions (S.W. Missouri & NW Arkansas weather) and I think I can truly say it doesn't seem to affect the life of the tool.
These tools work as hard I do.
August 9, 2020
Originally posted at
I love me some red tools
I love the quick adjustable guard it is very user friendly and the paddle switch
August 8, 2020
Originally posted at
Out performs competition!
If your in the market for battery powered tools Milwaukee is top of the line. I Used to have Dewalt but Milwaukee out preforms the market with high performance tools, for any job.
August 8, 2020
Originally posted at
Best tool ive bought in years.
I am so happy this thing cuts locks, steel, sheet metal on demand and powerful. One of my favorite tools
August 8, 2020
Originally posted at
Good grinder
This is my second one. First one lasted about 3 years getting used ever day and dropped on occasion.
August 8, 2020
Originally posted at
Best thing ever.
I came from a M18 brushed grinder. And no I have the brushless one. All I can say is the power difference is unreal.
August 2, 2020
Originally posted at
Great for cast iron pipe
I was doing demo of an entire cast iron waste system in a crawlspace and carbide blades were taking too long. I have a corded grinder but didn't want to deal with dragging cords underneath and I was trying to move quickly in this job. Got a thin diamond blade and completely demoed that system with one 4.0 battery in no time. Didn't bind and had the guts to cut through the cast with ease.
August 1, 2020
Originally posted at
I would recommend this tool
Have not used a lot yet but what I have it's a nice fit in my hand. Seem to have plenty of power, paddle switch with retainer is very nice. Run time should be good as all my other Milwaukee m18 tools.
July 25, 2020
Originally posted at

Q & A :

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Browse 4 questions Browse 4 questions and 5 answers
Will this work with a normal 18v battery or does it have to be the XC 4.0
Ross on Dec 23, 2014
BEST ANSWER: The grinder will work with any M18 series battery
Does any kind of blade come with this grinder?
Josh H on Mar 4, 2018
BEST ANSWER: It does not include any blades
What is the warranty on this item?
waylon on Dec 10, 2015
BEST ANSWER: Milwaukee offers a 5 year warranty on this tool.
I bought this tool to use on a log home sanding large pillar logs.

Where can I find/buy the accessories to do the job? Sanding disks, backing pad, spindle, disc nut, etc??
Thanks for the help
Rod on Sep 16, 2014
BEST ANSWER: Please contact the manufacturer direct at 1-800-729-3878 for a service/parts center in your area.