Milwaukee 2781-20 M18 Fuel 4-1/2″ / 5″ Grinder w/ Slide Switch

(1 customer review)


In stock


Milwaukee 2781-20 M18 Fuel 4-1/2" / 5" Grinder w/ Slide Switch Lock-on

  • First cordless grinder with corded performance
  • Same metal housing, gearing system, guards, flanges and anti-vibration side handles as Milwaukee corded grinders
  • Lower cost of ownership with up to 10X longer motor life
  • POWERSTATE brushless motor delivers 60% more peak torque, over 80% more power under load and 200% more run-time
  • REDLINK PLUS intelligence system optimizes performance and protects from overloading, overheating, and over-discharging
  • REDLITHIUM battery pack delivers up to 2X more run-time, up to 20% more power and over 2X more recharges
  • Electronic clutch prevents bind-up and extends tool life
  • Anti-vibration side handle
  • Thin body design for optimized balance in users hands
  • 100% tool-free accessory changes and guard installations and adjustments
  • Length: 15"
  • Weight: 5.8 lbs
  • Speed: 8,500 RPM
  • Arbor size: 5/8"
  • Tool warranty: 5 years


  •  Tool only (batteries and charger sold separately)
  • Flange nuts
  • Wheel guard
  • Spanner wrench
 Milwaukee M18 FUEL 4-1/2" / 5" Cordless Grinder Comparison
Model no. Switch Brake? Batteries
2780-20 Paddle No-Lock No Tool only
2780-22 Paddle No-Lock No Two 5.0Ah XC
2780-22HD Paddle No-Lock No Two 9.0Ah HD
2781-20 Slide w/Lock-On No Tool only
2781-22 Slide w/Lock-On No Two 5.0Ah XC
2781-22HD Slide w/Lock-On No Two 9.0Ah HD
2783-20 Paddle No-Lock Yes Tool only
2783-22 Paddle No-Lock Yes Two 5.0Ah XC
2783-22HD Paddle No-Lock Yes Two 9.0Ah HD

Additional information

Weight 6 lbs
Brand Name

18V Power Tools

1 review for Milwaukee 2781-20 M18 Fuel 4-1/2″ / 5″ Grinder w/ Slide Switch

  1. Ryan The Electrician

    Great quality from Milwaukee, and BC Fasteners delivered this very fast and on time!

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