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)

  • Note: Battery & Charger sold separately
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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
Powered Tool Power Source: Electric-Cordless
Switch Settings: Lock-On
Switch Type: Lock-On Slide
UL Safety: Yes
Variable Speed: No
Voltage: 18V
Wifi compatibility: No



4.4 / 5.0
30 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)
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
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
Broke after using twice
The lock to change the cutting wheels broke after two uses
August 11, 2019
Originally posted at
Great tool. Wish I had bought earlier.
Excellent tool. Extremely smooth running and very controllable. Batteries last longer than I thought they would.
August 11, 2019
Originally posted at
Better than corded!
We have a high end corded die grinder and several air drive ones. The Milwaukee M18 is our mechanics first choice. It is more convenient to use which means it is more likely to be used. An important note is that because of the ease of use minor issues are fixed before they become major ones that must be fixed. An outstanding tool.(We are a material processing company with a fleet of mobile shears, material handlers. and wheel loader that are in house maintained
August 11, 2019
Originally posted at
Amazing die grinder
Use this product daily grinding out pipe for hot water systems and gas mains.

Love it!!
August 11, 2019
Originally posted at
They can not make this grinder much better.
The best thing about the M18 Fuel die grinder I like, is the adjustable speeds and power at all speeds.
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 Out of Stock
Warranty: 5 Year 1 Year