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Internet # 311646209

Model # 2486-20

Store SKU # 1004856051

M12 FUEL 12V Lithium-Ion Brushless Cordless 1/4 in. Straight Die Grinder (Tool-Only)

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  • 20% More Power Than Pneumatic with 3-Mode RPM Control
  • Delivers Greater Mobility & Increased Access
  • Part of the M12 System, featuring over 125+ tools
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Product Details

About This Product

The Milwaukee M12 FUEL 1/4 in. Straight Die Grinder is designed to replace pneumatic die grinders. The die grinder provides users with up to .3 HP performance to outperform pneumatic die grinders by 20%. The M12 inline die grinder features 3-Mode RPM control and a responsive variable-speed trigger providing users with unmatched control with their most common accessories. The cordless die grinder gives users greater access and mobility, eliminating the frustrations of hoses and compressors.


Product Information

Internet # 311646209

Model # 2486-20

Store SKU # 1004856051

Additional Resources

Shop All Milwaukee


Dimensions: H 10.1 in, W 1.9 in, D 2.2 in


Product Depth (in.)

2.2 in

Product Height (in.)

10.1 in

Product Width (in.)

1.9 in

Wheel Diameter (in.)

2 in


Amperage (A)

0 A

Batteries Included


Battery Amp Hours

No Battery

Battery Power Type

Lithium Ion

Battery Size


Battery Voltage (V)


Charger Included

Charger Not Included

Color Family




Cordless Tool Type

Die Grinder



Electronic Speed Control


Grinder Switch Type



No Additional Items Included

Maximum Speed (RPM)

20000 RPM

Motor Type


Number of Total Batteries Included


Power Tool Features

LED Light, Spindle Lock, Variable Speed

Primary Collet Size


Product Weight (lb.)

1.2 lb



Tools Product Type

Power Tool

Variable Speed


Warranty / Certifications

Certifications and Listings

UL Listed

Manufacturer Warranty

5 Year Tool

Questions & Answers

Q:How many Rpms min maximum
by|Mar 1, 2024
1 Answer
Answer This Question

A:  Hi Pierre! It has a maximum speed of 20000 RPM. - Milwaukee Tool Social Team

by|Mar 5, 2024
    Q:will cut pvc
    by|Feb 23, 2023
    3 Answers
    Answer This Question

    A:  Yes, great for reaming out fittings.

    by|Feb 4, 2024

      A:  Hi Teddy! The M12 FUEL™ 1/4" Straight Die Grinder Generates 0.3 HP Motor Output and More peak power than pneumatic 0.25 HP die grinders. It is optimized for metalworking applications.

      by|Apr 25, 2023
        1 found this answer helpful

        A:  Yes, if you put the right cut-off wheel on

        by|Apr 25, 2023
          1 found this answer helpful
          Q:I just brought this and it doesn't accept 1/4 bits do I have a faulty one?
          by|Feb 7, 2023
          3 Answers
          Answer This Question

          A:  Hi James- Can you please send our team an email at social.media@milwaukeetool.com, so we can best assist? Thank you -Social Team

          by|Feb 23, 2023
            2 found this answer helpful

            A:  No you most likely do not have a faulty grinder. It’s their collet system, you have to wrench it open in order to fit the quarter inch shaft of your grinding bit. It’s Milwaukee’s locking collet system, it’s a little tricky until you figure it out. Then it works great. I figured this out by watching a You Tube video on how it works. Do a search on You Tube and you will see exact how it works. It is somewhat explained on page 5 of the manual under Installing Collet. It’s much better to watch the video on You Tube.

            by|Feb 21, 2024
              7 found this answer helpful

              A:  Probably not,just loosen the locking nut until it accepts the desired bit,and when you tighten it don't over do it,it tends to lock too much and hold that position, good luck...

              by|Feb 23, 2023
                2 found this answer helpful
                Q:have they fixed the dieing under load problems?
                by|Feb 27, 2022
                2 Answers
                Answer This Question

                A:  Hi Mike, if you are having issues with the Milwaukee M12 FUEL 12-Volt Lithium-Ion Brushless Cordless 1/4 in. Straight & Right Angle Die Grinder, please contact our team at 1-800-SAWDUST.

                by|Feb 27, 2022

                  A:  No I haven't gotten the problem fixed haven't made it to Bemidji is there any other place that has a representative that I could take them to

                  by|Feb 28, 2022
                    Showing 1-4 of 16

                    Customer Reviews

                    4.5 out of 5

                    • 4.5 out of 370 reviews
                    • 85% recommend this product
                    Filter by:
                    Showing 1-10 of 370 reviews
                    Milwaukee die grinder
                    I work in the marine engine industry servicing caterpillar marine engines. Both the straight and 90 degree die grinders make cleaning parts so much easier than having to drag an air hose down the dock and up into the boat. I get pretty decent battery life using them as well!
                    • Verified Purchase
                    • Recommended
                    straight die grinder
                    great product set up is easy batteries last better than i expected.
                    • Verified Purchase
                    • Recommended
                    M12 straight die grinder
                    Seems to work just fine, but there's a seem in between the motor and the switch my furst one broke there during my first use. My second one is loose right out of the box there. If that was improved it would be better.
                    • Verified Purchase
                    Would not use any other brand try the power tools
                    Best tools I ever owned I have used all other brands and have broken all of them now everything even my box is Milwaukee
                    • Verified Purchase
                    • Recommended
                    Gives up too fast
                    This grinder is brand new, I decided to use it to remove some paint on a catch can using a 3"x1"x1/4" flap/buff wheel. 2 minutes into the job it shuts down and over heats. I have tried 2 different batteries to rule it out, cp2.5 and xc5 and no change, still gives out. I applied little surface pressure and still it gives out. Very disappointing coming from Milwaukee. Will not recomend the unit to anyone else.
                      7 found this review helpful
                      Drimmel Tool... But For Men!
                      Love it. It's like a drimmel tool, but for men! Great feel in the hands!
                      • Verified Purchase
                      • Recommended
                      Works great die grinding holes or slots in sheet metal. Batteries do not last very long and tool gets hot from continuous use. After about 4 months the die grinder started feeling loose in middle. Finally it split in two. Had to buy another one as I needed to continue slotting holes for bolts in sheet metal duct. Middle section is built weak after extensive use it falls apart.
                      Response from Customer CareSep 1, 2022
                      Hello! Thank you for taking the time to share your experience. We appreciate all user feedback and use it to constantly improve. If you have any questions or further feedback, feel free to contact us at social.media@milwaukeetool.com -Social Team
                        • Recommended
                        Definitely not profession quality
                        Despite what they say it’s not more powerful than pneumatic, it’s definitely never been tested in the field by professionals, and where the motor body meets the head the grinder is coming apart / bending. It’s been used on 1 job so far. It might be fine for the average hobbyist but I don’t foresee it lasting long in a fabrication shop
                        • Verified Purchase
                        plenty of power, more than expected. this i a very capable tool.
                        • Verified Purchase
                        • Recommended
                        M12 FUEL 1/4 Straight Die Cutpocalyspe!
                        Easy to use. Performed the task that I did with ease. Enjoyed the speed adjustment and this tool is surprisingly quiet when using it.
                        • Verified Purchase
                        • Recommended
                        Showing 1-10 of 370 reviews