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Internet # 325281929

Model # 2531-20-0820-20

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M12 FUEL Orbital Detail Sander (Tool-Only) w/M12 12-Volt Lithium-Ion Cordless Jobsite Fan (Tool-Only)

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  • The cordless mounting fan has max air speed up to 14 MPH
  • Milwaukee mountable fan has a max air volume up to 400 CFM
  • 2X faster material removal with the POWERSTATE™ Brushless Motor
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Product Details

About This Product

Designed for the professional carpenter, remodeler, or general contractor; the M12 FUEL Orbital Detail Sander is optimized for precision and designed to complement larger sanders on the jobsite. The M12 FUEL Orbital Detail Sander delivers faster detail sanding, stain grade finish, and more access in corners and contours. The POWERSTATE Brushless Motor and REDLINK PLUS intelligence provides the power to remove material Up to 2X Faster than traditional hand sanding solutions on the market and protects from overload, overheating, and over discharge. The detail sander features an orbital eccentric motion with a 1.5mm orbit diameter to deliver a clean, consistent stain-grade surface finish. The new-to-world pad shape provides sharp, straight edges for greater accuracy and access into confined corners. The Milwaukee M12 Mounting Fan delivers 18V air speed anywhere on the jobsite, providing air performance up to 14 MPH and 400 CFM. The M12 Mounting Fan features powerful magnets, 2" spring loaded clamp, keyholes, and pass-through holes to deliver air movement wherever needed. This fan delivers unlimited directional airflow with 360 degree head rotation. Offering three speed settings - high, medium, and low, this fan provides optimal air speed control. With up to 15 hours of run time on an M12 XC6.0 battery, the 0820-20 provides all day run time on a single battery charge

Highlights

  • POWERSTATE brushless motor: generates the power to deliver 14K max OPM under load for faster material removal
  • REDLINK PLUS intelligence: ensures maximum performance and protects from overloads, heating, and over-discharge
  • Orbital sanding motion with 1.5 mm orbit diameter delivers a scratch-free stain grade surface finish
  • Compatible with the full lineup of new Milwaukee POWERGRID mesh sanding sheets
  • Lightweight, ergonomic design at 1.3 lbs. and low vibration minimizes user fatigue
  • Variable speed trigger with lock on button provides unmatched control across 4-speed settings
  • LED light illuminates the work surface to provide maximum visibility on the jobsite
  • Pad saver protects against excessive heat buildup to extend the life of the backing pad material
  • Sponge pad allows the abrasive to contour to the work surface when working with complex trim profiles
  • Fits all M12 battery packs
  • Includes: (1) M12 fuel orbital detail sander (2531-20), (3) 80 grit abrasive, (3) 120 grit abrasive, (3) 180 grit abrasive, hex wrench, sponge pad, pad saver, (1) M12 Mounting Fan (0820-20)
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Product Information

Internet # 325281929

Model # 2531-20-0820-20

Additional Resources

Shop All Milwaukee

Specifications

Dimensions: H 4.5 in, W 1.99 in, D 8.9 in

Dimensions

Product Depth (in.)

8.9 in

Product Height (in.)

4.5 in

Product Width (in.)

1.99 in

Details

Batteries Included

No

Battery Amp Hours

No Battery

Battery Power Type

Lithium Ion

Battery Size

12-volt

Battery Voltage (V)

12V

Charger Included

Charger Not Included

Color Family

Red

Cordless Tool Type

Detail Sander

Cordless/Corded

Cordless

Included

Other Accessories

Motor Type

Brushless

Number of Total Batteries Included

0

Power Tool Features

LED Light, Lock On Switch, Variable Speed

Product Weight (lb.)

1.67 lb

Returnable

90-Day

Speed (rpm)

14000

Tools Product Type

Power Tool

Warranty / Certifications

Manufacturer Warranty

5 Year Limited

Questions & Answers

I am considering buying this tool, but I am not a fan of mesh sandpaper. Does Milwaukee make other types of sandpaper? Or if not, with the off-brands of sandpaper for this tool stick to the base?
ByJul 27, 2026
1 Answer | 
Answer This Question

Great question! The M12 FUEL Orbital Detail Sander uses a hook-and-loop pad, so yes, you can use other sandpapers, as long as they match the shape and have hook-and-loop backing. Milwaukee’s included sheets are mesh for dust collection, but any compatible H&L type sheet works (off-brand included).

By|Jul 28, 2026


    How long will the 2.0 battery that comes with it last?
    ByJul 27, 2026
    1 Answer | 
    Answer This Question

    The M12 Jobsite Fan with an M12 REDLITHIUM CP2.0 battery runs for about 4–6 hours on low speed and around 2.5–3 hours on high (continuous use).

    By|Jul 27, 2026


      does any sand paper come in this kit
      ByJul 2, 2026
      1 Answer | 
      Answer This Question

      Yes — the M12 FUEL Orbital Detail Sander Kit includes assorted sandpaper sheets in the box for immediate use.

      By|Jul 6, 2026


        What size paper does this take?
        ByJun 5, 2026
        1 Answer | 
        Answer This Question

        Hey Mike. The M12 FUEL™ Orbital Detail Sander uses 3‑3/4" hook‑and‑loop detail sanding sheets designed specifically for its triangular pad. Milwaukee’s POWERGRID™ mesh sanding sheets are made to match this pad size and shape.

        By|Jun 10, 2026


          Does it have magnets on the bottom?
          ByApr 18, 2026
          1 Answer | 
          Answer This Question

          Hey, Miguel. The M12 Jobsite Fan uses hooks, keyholes, and tripod threads for mounting. It does not have a magnetic attachment.

          By|Aug 4, 2026


            What does tool only mean when describing the lithium ion fans
            ByApr 14, 2026
            2 Answers | 
            Answer This Question

            Tool-Only means the packaging comes with the tool (fan) only. It does not come with the battery or charger.

            By|Apr 16, 2026

              It means batteries are not included

              By|Jul 6, 2026

                (1)

                How big is this fan?
                ByFeb 9, 2026
                1 Answer | 
                Answer This Question

                The Milwaukee M12™ 12-Volt Lithium-Ion Cordless Jobsite Fan has the following dimensions: Length: 8.85 in, Width: 7.23 in, & Height: 13.1 in

                By|Feb 10, 2026


                  The width of the pad is not 1.99 inches, it's 2 and 5/8 inches. This screwed me up because I had a space that needed sanding that was 2 inches.
                  ByOct 1, 2025
                  0 Answer | 
                  Answer This Question

                  Viewing 1-8 of 35

                  Customer Reviews

                  4.6 out of 5

                  • 4.6 out of 491 reviews
                  • 93% recommend this product
                  Filter by:
                  Showing 1-10 of 491 reviews
                  This fan feels very sturdy and works well. I only wish it would last a little longer and be able to swivel.
                  by
                  Fan is great for commercial work and for outdoor events. Magnets are strong and the clamp works well. A 4ah battery ran for approx 4 hours with 2 bars to spare on speed 2 so battery life is pretty good. It doesn’t move enough air to cool a big space, but for a small space / personal fan it’s perfect.
                  by
                  This customer chose to rate the product and not provide text.
                  by
                  Great airflow, excellent mounting options, and very convenient to carry around. Ive had it for about a month now and it exceeded my expectations
                  by
                  Excellent tool for detail sanding
                  I've had this sander now for a few years and absolutely love it. Originally I bought a corded SurfPrep sander with all the bells and whistles, and if you know what that is you know how great it is. However, I didn't use it enough to justify the cost and I am already invested in the M12 line so this was a natural choice. I'm a carpenter so I primarily use it for detail sanding on cabinets and trim. But I also use it from time to time sanding drywall mud (pair it with a nice light to pickup inconsistencies...you can thank me later). Makes a good amount of dust without a vacuum hookup so probably should wear a mask. I don't use it all day every day so I consider the battery life to be great. The Milwaukee sanding pads work great as you'd expect them to, but if you're looking for more flexibility in profile sanding consider buying SurfPrep pads...you won't be disappointed. The thicker sponge pad that comes with this is OK but a little stiff and will knock back edges if you're not careful. The interface pad is useful but wore out fairly quickly for me. I like the ability to select the speed but it's variable speed already so I tend to leave it on max. Wish it had a belt hook/clip.
                  by
                    • Recommended
                    This customer chose to rate the product and not provide text.
                    by
                    Great sander! I have lots of sanders (Bosch, Fein, Festool...) and this is on par with them in terms of quality. What makes the Milwaukee special is it's size and functions. It can sand in areas that my other sander can't.
                    by
                    This customer chose to rate the product and not provide text.
                    by
                    Very nice sander for a great price! For $99 I got a detail sander battery and charger, Great deal!!!
                    by
                    The Milwaukee M12 Detail Sander is a fantastic tool for anyone tackling small projects or hard-to-reach areas. I recently used it to smooth out some patches around my exterior door where I had to repair some dry rot, and it performed perfectly. The compact size makes it easy to maneuver, and it has plenty of power for detailed sanding jobs without feeling overbearing. If you often find yourself working in tight spaces or touching up repair work, this sander is a real time-saver. Highly recommended.
                    by
                    Showing 1-10 of 491 reviews