Model#: MILN2783-20

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Brand new items;Full manufacturer warranty available
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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 2783-20 M18 FUEL Cordless 4-1/2 in. - 5 in. Braking Angle Grinder (Tool Only)

  • Note: Battery & Charger sold separately
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Product Overview


Milwaukee introduces the world's first cordless braking grinder stops accessories in under 2 seconds, delivers the power of a corded grinder, and has up to 10X longer tool life.?The M18 FUEL 18V Cordless 4-1/2 in. - 5 in. Braking Angle 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 grinder features REDLINK PLUS Intelligence, the most advanced system of cordless power tool electronics and for maximum performance. A Rapid Stop Brake feature stops accessories in under 2 seconds and it's thin body design gives it optimized balance to rest easily in your hands. The tool-free accessory changes uses the FIXTEC nut and guard adjustments mean less downtime during work. The grinder also has the same tool body, gearing system and anti-vibration side handle as Milwaukee's legendary high-performance corded grinders for maximum durability on the job.
  • Rapid Stop braking feature stops cutting disks in 0.9 seconds, flap disks in 1.3 seconds and grinding discs in 1.5 seconds
  • 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 Ah battery pack provides superior pack construction, electronics, and performance to deliver 2X more run-time and more work over pack life
  • World's first cordless braking grinder with corded performance
  • Same metal housing and gearing system as legendary high performance corded grinders
  • Tool-free accessory changes and guard adjustments without a wrench for increased productivity
  • M18 FUEL Cordless 4-1/2 in. - 5 in. Braking Angle Grinder (Tool Only) -2783-20
  • Tool Only - Batteries and Charger Sold Separately


Series: FUEL
Cordless: Yes
Length: 15.25 in.
Width: 2.75 in.
Height: 4.5 in.
Weight: 6.1 lbs.
Amp Hour: 5 Ah
Arbor Size: 5/8 in
Batteries Included: 0
Battery System: M18
Battery Type: Li-Ion
Bluetooth Compatibility: No
CSA Safety: No
Case Included: No
Charger Included: No
ETL Safety: No
Motor Type: Brushless
No-Load Speed (RPM): 8500
Powered Tool Power Source: Electric - Cordless
Spindle Thread: 5/8 in - 11
Switch Settings: No Lock-On
Switch Type: Paddle
UL Safety: Yes
Variable Speed: No
Voltage: 18V
Wheel Diameter: 4.5 in / 5 in
Wifi compatibility: No



4.8 / 5.0
51 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (10)
Powerful (7)
Easy To Use (6)
Value (5)
Battery Longevity (if applicable) (4)
Best Uses
Small Projects (3)
Frequent Use (2)
Heavy Duty Requirements (2)
Large Projects (2)
Great tool to add to your must have list!
Metal fabrication shop that builds and installs assemblies. We are extremely happy with the performance and durability of these cordless grinders. The amount of time saved by not having to string out miles of power cord just to perform a 5 minute cut/fix makes it more than pay for itself.
September 3, 2019
Originally posted at
Awesome tool
I use the braking grinder for various tasks from grinding cutting and wire brushing, works well I like how fast the brake stops disc one of the safest angle grinders I’ve used
August 28, 2019
Originally posted at
Amazing tools
The things I find great about this tool is the quick easy release for the blades, no longer needing a separate bar is so nice. The tools performance for longer lasting on a 4 - 5ah battery is in credible compared to the 2 year old non fuel Grinder that I have as well. The fast stop trigger release is extremely handy to have considering I've made unwanted cuts or burned out disks just cause I've been complacent when working all day and just wanted to set the older grinders down, not realizing that it hasn't made a complete stop yet. The guard is easy to adjust for any angle, and the handle just seems to have better feel for when there is intense cutting or ripping.
I don't find there is much of anything that's wrong with the tool. It is a grinder so it is expected that it will use up batteries at a fast rate than say a drill.
I look forward to purchasing more FUEL tools and seeing what new technology Milwaukee tools puts forward.
August 19, 2019
Originally posted at
Hope I don't have to buy it again, it''s expensiv
I do a lot of cast iron pipe, cuts easy. Love the breaking when trigger released.
August 18, 2019
Originally posted at
Great product
This tool works great and the battery life is surprisingly long. The tool doesn’t seem to get warm even after extended periods of use and is over all a very nice product.
August 18, 2019
Originally posted at
I have 3, not satisfied with any of them
I’m a welder/fabricator and have 3 of these. My first one has been sent in for repairs and doesn’t work like it did. Between the 2 new ones I have: 1 quits so frequently I don’t use it and the other one seems to ruin batteries I use with it. The fat grip and non-locking paddle switch make it near impossible to use for extended periods of time and I’m 6’5 with XXL hands. Not satisfied with any of them and won’t be buying or recommending this model grinder now or in the future.
August 13, 2019
Originally posted at
I would buy it
It works pretty good but needs a little bit more speed and the lever to start it does not work very good
August 13, 2019
Originally posted at
I love this grinder
Love this tool. Has a million uses. Simple and easy light weight and powerful. Another awesome tool every farm boy needs
August 12, 2019
Originally posted at
i without a doubt would buy this tool again ,,,,,,
i use my grinder on trailer and on any repairs that need a grinder ,,,the battery keeps charge great ,,,long time before the recharge is needed ,,,,,
August 12, 2019
Originally posted at
A very nice tool.
I already have the 4-1/2" and fell in love with it. I may use it 1 to 2 times a month. But this 4-1/2" / 5" braking grinder provides the flexibility and heavier drive system to handle anything. This unit is a little larger than the 4-1/2". Easy on and off disk change. Very comfortable hand grip allows maximum control. Easy access to on/off controls. Simply a very nice tool.
August 12, 2019
Originally posted at

Questions & Answers

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Browse 2 questions Browse 2 questions and 3 answers
Does this braking grinder use more battery than the no brake model
Keith on May 3, 2016
BEST ANSWER: Yes, the electric brake is going to draw more from the battery compared to the non-braking model 2780-20
Are the XC 4.0 and XC 5.0 batteries interchangeable in the tools?
A shopper on Dec 17, 2016
BEST ANSWER: Yes they all are, from xc to the 9.0 they all work.

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 Cordless 4-1/2 in. - 5 in. Braking Angle Grinder (Tool Only) -2783-20,
Tool Only - Batteries and Charger Sold Separately
M18 FUEL Cordless 4-1/2 in. - 5 in. Braking Angle Grinder - 2783-80,
(1) Flange Nut,
(1) FIXTEC Nut,
(1) T27 Guard,
Battery & Charger Sold Separately
Availability: In Stock In Stock
Warranty: 5 Year 3 Year


The Milwaukee Warranty Every MILWAUKEE power tool is tested before leaving the factory and is warranted to be free from defects in material and workmanship. MILWAUKEE will repair or replace (at MILWAUKEE's discretion), without charge, any tool (including battery chargers) which examination proves to be defective in material or workmanship from five (5) years after the date of purchase. Return the tool and a copy of the purchase receipt or other proof of purchase to a MILWAUKEE factory Service/Sales Support Branch location or MILWAUKEE Authorized Service Station, freight prepaid and insured. This warranty does not cover damage from repairs made or attempted by other than MILWAUKEE authorized personnel, abuse, normal wear and tear, lack of maintenance, or accidents.

The warranty period for V28, M12 and M18 Li-Ion Battery Packs is two (2) years from the date of purchase. XC M18 Battery packs carry a (3) year warranty. The warranty period for Ni-Cd Battery Packs, Flashlights, Radios, and Professional Hoists (lever, chain, and electric) is one (1) year from the date of purchase.

*The warranty period for Portable Generators is two (2) years from the date of purchase.



This warranty gives you specific legal rights. You may also have other rights that vary from state to state and province to province. In those states that do not allow the exclusion of implied warranties or limitation of incidental or consequential damages, the above limitations or exclusions may not apply to you. This warranty applies to the United States, Canada, and Mexico only.

Please call Milwaukee Electric Tool Corporation for warranty questions at 800-729-3878