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Model#: MILN2780-20

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Milwaukee 2780-20 M18 FUEL 18V Cordless Lithium-Ion 4-1/2 in. - 5 in. Paddle Switch Grinder (Bare Tool)

Model#: MILN2780-20
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$40.99 (20%)
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Product Overview


The M18 FUEL 4-1/2 in. / 5 in. Paddle 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. The world's first cordless grinder delivers the power of a corded grinder with up to 2X more run time and up to 10X longer motor life.
  • 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
  • M18 FUEL 4-1/2 in. - 5 in. Paddle Switch Grinder (Bare Tool) -2780-20
  • Flange Nuts
  • Wheel Guard
  • Spanner Wrench
  • Bare Tool - Batteries and Charger Sold Separately


Series: FUEL
Cordless: Yes
Length: 14.5 in.
Weight: 4.2 lbs.
Power Type: Electric
RPM: 8,500
Spindle Lock: Yes
Spindle Thread: 5/8-in-11
Switch Type: Paddle
Tool Free Guard: Yes
Voltage: 18V
Wheel Diameter: 4-1/2 in. / 5 in.

More Versions Of This Item

Item Name Price
MILN2780-21 Milwaukee M18 FUEL 18V Cordless 4-1/2 in. - 5 in. Paddle Switch Grinder with REDLITHIUM Battery
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MILN2780-22 Milwaukee M18 FUEL 18V Cordless 4-1/2 in. - 5 in. Paddle Switch Grinder with 2 REDLITHIUM Batteries
View »


Product Reviews


by PowerReviews

(based on 1 review)

Reviewed by 1 customer

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Good Grinder

By Tool man

from Grants Pass , OR

Verified Buyer


  • Good run time
  • Great power


  • Heavy
  • No variable speed control

Best Uses

  • Field
  • Shop

A battery powered grinder seems to be the last frontier for battery powered tools.
This grinder replaced an earlier Milwaukee V-28 (28 Volt) battery grinder which was a big dissapointment. The V-28 tool had good power but a VERY limited run time (we're talking 3 - 4 minutes here) on a battery charge.
The new M-18 Fuel Grinder is easily three or four times as good.
I use this for heavy metal grinding in sitations where a corded tool is less convenient. The M-18 Fuel grinder has just as much power as an 8 amp corded grinder and the run time on one battery charge is about 10 - 12 minutes.
Heavy metal grinding takes a lot of power and seems to be the most demanding job for a battery powered tool. While saws, drills and etc. battery tools seem to run for ever, grinding metal really taxes the battery system. The new M-18 Fuel grinder is at the head of the class in this category. It is a very well made tool and the ergonomics, including the paddle switch, are as good as they come.

  • Was this a gift?:
  • No

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