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Milwaukee M18 FUEL™ 1/4" Braking Die Grinder, Slide Switch (2939-20)

Milwaukee M18 FUEL™ 1/4" Braking Die Grinder, Slide Switch (2939-20)

Regular price $259.00 USD
Regular price Sale price $259.00 USD
Sale Sold out
Shipping calculated at checkout.

Product Description

The Milwaukee M18 FUEL™ 1/4" Braking Die Grinder, Slide Switch (2939-20) delivers outstanding power, precision, and cordless freedom for demanding grinding applications. Powered by a POWERSTATE™ Brushless Motor, this die grinder provides the performance of a pneumatic grinder without the need for air hoses or compressors. With speeds up to 27,000 RPM, a 1/4-inch collet, 4-Mode Speed Control, and a RAPIDSTOP™ Brake, it offers exceptional control, productivity, and safety for grinding, deburring, polishing, and surface preparation. Compatible with all Milwaukee M18™ batteries, the 2939-20 is built for professional metal fabrication, automotive work, welding, and industrial maintenance.


Key Features

  • Genuine Milwaukee Product
  • POWERSTATE™ Brushless Motor
  • Pneumatic Performance Without Air Hoses
  • 1/4" Collet
  • Up to 27,000 RPM
  • 4-Mode Speed Control
  • RAPIDSTOP™ Brake
  • Slide Switch with Lock-On
  • REDLINK PLUS™ Intelligence
  • Spindle Lock for Fast Accessory Changes
  • Compatible with All Milwaukee M18™ Batteries
  • Professional Cordless Performance

Ideal For

Perfect for:

  • Metal Fabrication
  • Automotive Repair
  • Weld Cleanup
  • Surface Preparation
  • Deburring
  • Grinding
  • Polishing
  • Industrial Maintenance

Technical Specifications

Specification Details
Brand Milwaukee
Model 2939-20
Tool Type Braking Die Grinder
Series M18 FUEL™
Motor POWERSTATE™ Brushless
Battery Platform M18™
Collet Size 1/4 in.
Maximum Speed 27,000 RPM
Speed Modes 4
Switch Type Slide Switch with Lock-On
Brake RAPIDSTOP™
Battery Included No
Charger Included No
Warranty 5-Year Limited Tool Warranty

What's Included

  • Milwaukee M18 FUEL™ 1/4" Braking Die Grinder, Slide Switch (2939-20)
  • 1/4" Collet
  • Wrench

Battery and charger sold separately.



Why Choose This Model?

Pneumatic Performance Without the Air Hose

The 2939-20 delivers up to 27,000 RPM, providing the performance of a pneumatic die grinder while eliminating the need for compressors and air hoses.

Precision, Control, and Enhanced Safety

Featuring 4-Mode Speed Control, a RAPIDSTOP™ Brake, and a slide switch with lock-on, this die grinder gives professionals outstanding control for grinding, deburring, polishing, and surface preparation.

Built for Professional Productivity

Powered by a POWERSTATE™ Brushless Motor and REDLINK PLUS™ Intelligence, the 2939-20 delivers reliable cordless performance, longer motor life, and compatibility with the entire Milwaukee M18™ battery system.


Compare Before You Buy

Feature Milwaukee 2939-20
Tool Type Braking Die Grinder
Motor POWERSTATE™ Brushless
Collet Size 1/4 in.
Maximum Speed 27,000 RPM
RAPIDSTOP™ Brake
4-Mode Speed Control
Slide Switch with Lock-On
Battery Platform M18™
Our Recommendation ⭐ Best M18 FUEL Braking Die Grinder

Industry Applications

Ideal for professionals working in:

  • Metal Fabrication
  • Automotive Repair
  • Welding
  • Industrial Maintenance
  • Surface Preparation
  • Equipment Repair
  • General Fabrication
  • Mechanical Contracting

Compatible Accessories

For the best performance, pair this die grinder with:

  • Milwaukee M18™ REDLITHIUM™ FORGE™ Batteries
  • Milwaukee M18™ Battery Chargers
  • 1/4" Carbide Burrs
  • Grinding Stones
  • Flap Wheels
  • Surface Conditioning Discs

Packaging Notice

This product may not include the original retail packaging. However, every order is carefully inspected, securely packaged, and protected to ensure it arrives safely and in excellent condition.


Why Buy from Mike Resells?

When you shop with Mike Resells, you're getting more than just professional tools.

We proudly offer:

  • Genuine Products
  • Competitive Prices
  • Secure Checkout
  • Carefully Packaged Orders
  • Free U.S. Shipping
  • Fast Shipping to Most Countries

Frequently Asked Questions

1. Is this Milwaukee die grinder genuine?

Yes. Mike Resells sells only genuine Milwaukee products sourced from trusted suppliers.

2. Does this tool include a battery or charger?

No. Model 2939-20 is the bare tool only. Batteries and chargers are sold separately.

3. What accessories can the 2939-20 use?

The tool accepts 1/4-inch shank accessories, including carbide burrs, grinding stones, flap wheels, polishing accessories, and surface conditioning attachments.

4. What does the RAPIDSTOP™ Brake do?

The RAPIDSTOP™ Brake quickly stops the accessory after the switch is released, helping improve jobsite safety and reduce downtime.

5. How quickly do you ship orders?

Orders are processed quickly and include Free U.S. Shipping and Fast Shipping to Most Countries.


Related Models

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  • Milwaukee M18 FUEL™ 2889-20 Variable Speed Grinder
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