Model#: MILN2781-20
Condition:
New

What are the different product conditions?

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

Milwaukee 2781-20 M18 FUEL Lithium-Ion 4-1/2 in. - 5 in. Slide Switch Grinder with Lock-On (Bare Tool)

  • Note: Battery & Charger sold separately
List:
$199.99
Sale Price:
$179.00
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Buying Options:
Bare Tool $179.00
Grinder w/ 4.0 Ah Battery See Price in Cart
Grinder w/ (2) 4.0 Ah Batteries $419.00
Grinder w/ 9.0 Ah Batteries $549.00
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Product Overview

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Details

The M18 FUEL 4-1/2 in. / 5 in. Slide Switch 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 XC4.0 Battery Pack (Sold Seperately) 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.
Features:
  • POWER TO GRIND means the World's first cordless grinder with corded performance
  • Same metal housing and gearing system as legendary high performance corded grinders
  • Thin body design and anti-vibration handle provides optimized balance to rest easily in your hands
  • Tool-free accessory changes and guard adjustments mean less downtime during work
  • 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 4.0 Battery Pack (Sold Separately) provides superior pack construction, electronics, and performance to deliver 2X more run-time and more work over pack life
Includes:
  • M18 FUEL 4-1/2 in. - 5 in. Slide Switch Grinder with Lock-On (Bare Tool) -2781-20
  • Flange Nuts
  • Wheel Guard
  • Spanner Wrench
  • Bare Tool - Batteries and Charger Sold Separately
Downloads:
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Specifications

Series: FUEL
Cordless: Yes
Batteries Included: 0
Battery Type: Li-Ion
No-Load Speeds (RPM): 8,500
Spindle Thread: 5/8 in. - 11
Switch Settings: Lock-On
Switch Type: Slide
Voltage: 18V
Wheel Diameter: 4-1/2 in. / 5 in.
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Recommendations

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Reviews

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4.7 / 5.0
29 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
23
4
1
1
0
Recommendations
Yes, I would recommend this to a friend (20)
Pros
Powerful (15)
Easy To Use (13)
Ergonomic Design (10)
Value (5)
Cons
Heavy (1)
Uncomfortable to Use (1)
Best Uses
Jobsite (7)
Frequent Use (6)
Large Projects (5)
Small Projects (5)
BROKEN AGAIN
Bought this grinder with a kit mid last year and used it for about 10 minutes before i noticed it seemed under powered and would come to a stop instantly when i let off the paddle switch. The grinder smelt bad like it was binding and there was a few little sparks coming out the vent. Took it in for warranty, all went well and the grinder worked great. Now about 4 months later ive again barely used the grinder and im having the exact same issue. I left a review here when it first happened and now its gone like many other reviews similar to mine.
January 16, 2019
Originally posted at
Recommendations
Yes, I would recommend this to a friend
Pros
Ergonomic Design
Powerful
Value
Cons
Heavy
Best Uses
Frequent Use
Large Projects
Small Projects
Jobsite
Great tool!
Somebody needs to come up with an adapter to allow 7/8 disk. 5/8-11 disk are few and far in-between and hard to find
January 4, 2019
Purchased
 2 months ago
Describe Yourself:
Avid Do-it-Yourselfer
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Powerful
Value
Lightweight
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Home Repair
Jobsite
very convenient
this tool handles all the use I put it thru,great buy
September 25, 2018
Purchased
 5 months ago
Recommendations
Yes, I would recommend this to a friend
Pros
Powerful
Cons
Uncomfortable to Use
Best Uses
Jobsite
Runs great without having a cord to deal with. Makes it super easy to pull this out and just go to work.
September 24, 2018
Purchased
 5 months ago
Describe Yourself:
Professional
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Powerful
Battery Longevity (if applicable)
Best Uses
Home Repair
Awesome tool
Great grinder and very powerful with the cord getting in your way
June 2, 2018
Purchased
 9 months ago
Describe Yourself:
Avid Do-it-Yourselfer
Great Tool
This is one tool I waited too long to switch to battery power. The convenience of not hassling with a cord is such pleasure and see no loss in power over my other two corded grinders.
May 20, 2018
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Powerful
Best Uses
Frequent Use
Large Projects
Small Projects
Home Repair
Jobsite
5" Disks hard to find
The grinder works with 4.5" or 5" discs and comes with 5" guards It is all but impossible to find 5" grinding or cutting discs for a 5/8" arbor. Either send the 4.5" guards with the grinder or make the arbor 7/8" so discs are easy to find.
May 17, 2018
Purchased
 9 months ago
Describe Yourself:
Avid Do-it-Yourselfer
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Value
Lightweight
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Jobsite
Great Item to have when not power is around.
I would say if you need the use of a cordless grinder Buy this unit.
February 20, 2018
Purchased
 1 year ago
Describe Yourself:
Professional
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Powerful
Her happy, not surprised
Love the tool. Working with welding and hot metal. Nice to not have to worry about cord getting melted. Haven't went after any big projects yet to test endurance but it seems to have been easy on the battery for the medium duty projects. And never cut out, but nice it has protection in case overwork. . I chose the model with the locking switch on top, since have never been able to get used to a switch on bottom of handle. Seems the one on bottom iis always in the way for carrying and hard to shut off without letting go. The switch on the top model doesn't come with a brake option, but I'm an amatuer and can wait for it to spin down. Came with two guards for type 1 and 27 wheels which was nice. Seems to be very well built like heavy duty models. You do need to use a tool to take spindle nut off (which I expected, but I thought I saw tool less changes somewhere). Not sure there is anything I would suggest changing except for the brake and would be nice to see it made in the US. I'd recommend it to my friends.
May 10, 2017
Purchased
 1 year ago
Describe Yourself:
Avid Do-it-Yourselfer
Recommendations
Yes, I would recommend this to a friend
Pros
Easy To Use
Ergonomic Design
Powerful
Value
Battery Longevity (if applicable)
Lightweight
Best Uses
Frequent Use
Large Projects
Small Projects
Home Repair
Jobsite
Milwaukee 2781-20 M18 FUEL 18V
This is my go to crab when cutting metal! fits in your tool bag or toolbox. Grinds and cuts. Awesome tool to have!
January 16, 2017
Purchased
 over 2 years ago
Describe Yourself:
Avid Do-it-Yourselfer
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Questions & Answers

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Browse 3 questions Browse 3 questions and 6 answers
How long can be used before recharge in production no stop ?
Edwin on Apr 19, 2016
BEST ANSWER: That is a very difficult question to answer, runtime depends on many variables. Without knowing whats being done with the grinder, continous runtime could be anywhere from 30 minutes to a couple hours with the 4Ah battery. Keep in mind, charge time is relatively short, with a couple of batteries you can get alot accomplished with little
downtime.
The description states "Tool-free accessory changes," but a reviewer said that he needed a tool to remove the flange nut. The downloadable manual also states that a spanner wrench is required to tighten and loosen the flange nut. Also, if accessories can be changed without a tool/wrench, why is one included? Can wheels/accessories be installed and removed without a tool or not?
A shopper on Nov 25, 2017
BEST ANSWER: In almost all cases, you can swap blades without a tool. If the blade is the face, on the back of the head is a lever which unclamps the spindle. It is not enough to flip this lever up; you must flip it all the way forward. When you do, the spindle/arbor tension is released and you can unscrew the spindle-cap/arbor-nut with your fingers. If you don't understand how this works, you will probably overtighten the cap/nut and then need a wrench to get it off again.

So, wheels/accessories CAN be installed without a tool, if you don't go out of your way to make it more difficult than necessary.
Can you interchange the types of Milwaukee batteries with chargers and tools?
Frank on Oct 19, 2015
BEST ANSWER: All Milwaukee 18 volt lithium ion tools and batteries are compatible,so yes everything is interchangeable.
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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 4-1/2 in. - 5 in. Slide Switch Grinder with Lock-On (Bare Tool) -2781-20,
Flange Nuts,
Wheel Guard,
Spanner Wrench,
Bare Tool - Batteries and Charger Sold Separately		 M18 FUEL 4-1/2 in. - 5 in. Slide Switch Grinder with Lock-On (Bare Tool) -2781-80,
Flange Nuts,
Wheel Guard,
Spanner Wrench,
Bare Tool - Batteries and Charger Sold Separately
Availability: In Stock Out of Stock
Warranty: null 1 Year Limited
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