Model#: MILN2784-20

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Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 120 day money back guarantee
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New items with possible minor cosmetic damage; CPO 120 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Milwaukee 2784-20 M18 FUEL 1/4 in. Brushless Die Grinder (Tool Only)

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  • Milwaukee 2784-20 M18 FUEL 1/4 in. Brushless Die Grinder (Tool Only)
  • Note: Battery & Charger sold separately
(See Price in Cart)
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Product Overview


The world’s first brushless die grinder that delivers corded performance with over 20 minutes of grinding and up to 10X longer motor life.The M18 FUEL 1/4 in. Die Grinder delivers maximum sustained power with 20,000 RPMs capable of running carbide burrs or up to 3 in. flap wheels for grinding or surface preparation applications. The M18 REDLITHIUM XC5.0 Battery (sold separately) provides up to 25 minutes of grinding with superior pack construction and electronics. The POWERSTATE Brushless Motor provides up to 10X longer tool life and lower cost of ownership than traditional brushed motors. The die grinder features REDLINK PLUS Intelligence, the most advanced system of cordless power tool electronics, for maximum performance and longest tool life.
  • POWERSTATE brushless motor delivers constant power under heavy load for maximum performance
  • REDLINK PLUS intelligence system ensure optimal performance and overload protection to prevent damage during heavy applications
  • REDLITHIUM battery pack provides superior power, performance and runtimes than competing battery packs
  • Corded performance from a lightweight and powerful cordless grinder
  • M18 FUEL 1/4 in. Brushless Die Grinder - 2784-20
  • Tool Only - Battery & Charger Sold Separately


Series: FUEL
Cordless: Yes
Length: 18 in.
Width: 3.20 in.
Height: 4.50 in.
Weight: 3.65 lbs.
Batteries Included: 0
Battery System: FUEL
Battery Type: Li-Ion
Bluetooth Compatibility: No
CSA Safety: Yes
Case Included: No
Charger Included: No
Collet Size: 1/4 in
ETL Safety: Yes
Motor Type: Brushed
No-Load Speed (RPM): 20000
Power Source: Electric-Cordless
Switch Settings: Lock-On
Switch Type: Lock-On Slide
UL Safety: Yes
Variable Speed: No
Voltage: 18V



4.4 / 5.0
35 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (4)
Powerful (3)
Easy To Use (2)
Ergonomic Design (1)
Battery Longevity (if applicable) (1)
Best Uses
Frequent Use (2)
Home Repair (2)
Jobsite (2)
Heavy Duty Requirements (1)
Wish I could sell it back to Milwaukee
Collector Car Restoration
This tool does not have Variable Speed and can only be used with Carbide Burrs. It Vibrates terribly if you attempt to use a High Quality Disc
September 21, 2019
Originally posted at
Awesome product!
Easy to assemble. Plenty of power. Very worthwhile purchase!
September 15, 2019
Originally posted at
It is a great tool I use daily when welding .
I use the die grinder to help clean my welds and burs off the inside of cut pipe.
September 13, 2019
Originally posted at
Cordless freedom with air power and control
We use these daily and couldn't be more happy with their capability and performance. It will really eat metal with cutoff discs, sander discs, Rolec heads, or carbide burs. The lack of a variable speed is the only draw back, but hasn't slowed us down. Our air use has dropped well below half after we put a couple of these and some cordless impacts in the shop.
September 7, 2019
Originally posted at
Great tool glad I purchased it
The die grinder is used primarily as a inside pipe cutter for installation of cast iron clean outs and floor drains too works great plenty of power does not bog down will definitely purchase another one
August 14, 2019
Originally posted at
Great tool “But”
I pull this tool out of my truck from time to time when needed for die grinding jobs. Sometimes with trepidation though. The bits are near impossible to get unstuck from the collet. It can be a real fight. I’ve tried some lube and will see if that helps, does most other applications. So far it’s been love hate
August 13, 2019
Originally posted at
I would buy this grinder again!
Great purchase.I use it often on repairs in the steel mill melt shop I work in.Works great with the HD 12.0 battery pack.
August 12, 2019
Originally posted at
I would buy this grinder again!
Great purchase.I use it often on repairs in the steel mill melt shop I work in.Works great with the HD 12.0 battery pack.
August 12, 2019
Originally posted at
Perfect balance of power and mobility
We use this tool to open up conduit that houses fiber optic cables in order to to install y tap fittings to change/add routing without interpretation of service for the wireless communications industry. The tool is the perfect balance of weight and power.
August 11, 2019
Originally posted at
Die grinder
Loads of power, lasts a good 20 minutes, find it a bit heavy after a time
August 11, 2019
Originally posted at

Questions & Answers

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Browse 6 questions Browse 6 questions and 12 answers
Can I use this tool with a cut-off wheel? If so, can I easily find cutting wheels to fit?
Jerry on Jun 18, 2017
BEST ANSWER: This is a die grinder not a cut off tool in order to use as a cutoff tool you would have to buy Arbor adapter
Is it a variable speed ?
A shopper on Oct 23, 2018
BEST ANSWER: Model 2784-20 is not a variable speed unit.
Is there a gard for a cutting wheel ?
A shopper on Sep 8, 2018
BEST ANSWER: No guard, you maybe better off with an angle grinder.
Can this tool also be used to Tap steel with a “Tap”(whichever thread count needed)?
A shopper on Jul 18, 2018
BEST ANSWER: No - it’s rpms are too high. If it’s thinner metal, it would be better to use a Milwaukee drill with a self drilling tap (combo tap).
What RPM does it run at ?
A shopper on Jan 8, 2018
BEST ANSWER: 20,000 - it really zings, and has plenty of power!
Does this come with the wrenches to change the dies ?
tjmoose on Mar 4, 2019
BEST ANSWER: Model 2784-20 will include the following items listed below:

(1) M18 FUEL™ 1/4" Die Grinder (Tool Only) (2784-20)
(1) 1/4" Collet
(2) Wrench

New Vs. Reconditioned

What's the difference between New and Factory-Reconditioned?

Factory-Reconditioned products have been returned to the manufacturer and are restored to like-new operating condition; they go through a rigorous testing and inspection process. Plus, they offer a significant savings vs. new.
  • Reconditioned products may have minor cosmetic blemishes or scratches that do not affect item performance.
  • Reconditioned products may not come with all of the consumables the new version comes with (bits, sanding pads/papers, cases, etc.).
  • Both come with a manufacturer warranty and are covered by our Money Back Guarantee; New is 30 days, Reconditioned is 120 days.
Condition: New Factory Reconditioned
Features: Same Same
Specs: Same Same
Includes: M18 FUEL 1/4 in. Brushless Die Grinder - 2784-20,
Tool Only - Battery & Charger Sold Separately
M18 FUEL 1/4 in. Brushless Die Grinder - 2784-80,
Tool Only - Battery & Charger Sold Separately
Availability: In Stock In Stock
Warranty: 5 Year 1 Year