If you've switched from a corded sander to a cordless one, you know how much easier it makes the job. You're not dragging an extension cord across the shop, looking for an outlet, or fighting a cord every time you move around the workpiece.
Milwaukee's cordless sander lineup covers everything from finish sanding and detail work to metal fabrication and auto body repair. Whether you need a random orbit sander, an inline detail sander, or a bandfile for tight spaces, there's a tool built for that kind of work. And if you're already running M12 or M18 tools, you've probably got the batteries to power it.
Shop all Milwaukee SandersM12 vs. M18: Which Platform Fits Your Work
Milwaukee's sander lineup is split between two battery platforms: M12 and M18. The difference isn't just size. It determines what you can buy, what accessories you need, and how the tool performs under load.
M18 is the heavier platform. The M18 sanders are built for bigger jobs where you're covering a lot of surface area. If you're already running M18 on a drill, circular saw, or impact driver, those same batteries work on the M18 sanders in this lineup.
M12 is the compact platform. The M12 sanders are lighter, easier to use in tight spaces, and better for detailed work. Don't mistake compact for underpowered. The M12 FUEL tools, which use brushless motors, deliver real performance for the jobs they're designed for. And again, if you've got M12 batteries from other tools, they transfer right over.
The 2438-20 polisher/sander and 2531-20 detail sander are M12 tools that see a lot of use in trade settings. The 2648-20 and 2837-20 are M18 tools that are popular with woodworkers and contractors doing surface prep on larger panels and floors.
M18 Woodworking Sanders
The three M18 sanders in this lineup cover the most common sanding scenarios in woodworking and construction. You've got two 5-inch random orbital options at different price points, and a 1/4 sheet sander for flat panel and board work.
The 2648-20 and 2837-20 are both 5-inch random orbitals, but they're not identical. The 2837-20 is the FUEL version with a brushless motor. That means more runtime per charge and more consistent speed when you press into the work. The 2648-20 is the standard M18 version, which is still a capable tool but doesn't have the brushless motor advantage.
The 2649-20 quarter-sheet sander is a different tool entirely. It uses a rectangular pad, which is better suited for getting into flat surfaces, tight corners, and areas where a round pad can't edge in cleanly.
| Model | Pad Type | Motor | Best For |
|---|---|---|---|
| 2648-20 | 5" Round | Standard M18 | General surface prep, woodworking |
| 2837-20 | 5" Round | M18 FUEL Brushless | Extended-use woodworking, high-demand surface prep |
| 2649-20 | 1/4 Sheet | Standard M18 | Flat boards, corner sanding, detailed trim work |
2648-20 M18 Random Orbit Sander
The 2648-20 is Milwaukee's standard M18 random orbital sander. It uses a 5-inch hook-and-loop pad and runs on any M18 battery. It's a solid choice for contractors who need a sander for general surface prep and already have M18 batteries from other tools. It's not the FUEL version, so it doesn't have the brushless motor, but it's still a capable tool for the price.
2837-20 M18 FUEL 5" Random Orbital Sander
The 2837-20 brings Milwaukee's FUEL technology to the random orbital sander. The brushless motor runs cooler, lasts longer, and maintains speed better when you're pushing into harder materials. If you're sanding for long stretches, the extra runtime you get with a brushless motor makes a real difference. This is the tool most professional woodworkers will reach for over the standard 2648-20.
2649-20 M18 Orbital 1/4 Sheet Sander
The 2649-20 uses a standard 1/4 sheet sandpaper pad format. That rectangular pad is the right shape for sanding with the grain on boards, getting into cabinet frame joints, and working on trim pieces where a round pad leaves marks in corners. If you do a lot of cabinetry or furniture work, having a sheet sander on hand fills gaps that a random orbital can't.
M12 FUEL Orbital Detail Sander
The 2531-20 is built for one specific problem: getting into places where nothing else fits. Cabinet interiors, furniture spindles, tight trim joints, and narrow openings are all places where a standard sander is too large to maneuver. The 2531-20 uses a small detail sanding pad and the M12 FUEL platform, which means it's running a brushless motor in a very compact package.
| Model | Platform | Motor | Best For |
|---|---|---|---|
| 2531-20 | M12 FUEL | Brushless | Detail work, tight spaces, furniture, trim |
This tool sees a lot of use in finish carpentry and furniture restoration. It's not designed for bulk material removal. It's the tool you reach for when you need precision in a tight spot and the larger sanders just aren't going to work.
M12 Variable Speed Polisher/Sander
The 2438-20 and 2438-22X are the same core tool at two different price points. The 2438-20 is the bare tool, which works if you already have M12 batteries. The 2438-22X is the kit version that includes an XC (extended capacity) battery, which is a higher-capacity pack that gives you more runtime before you need to swap.
These tools do two things. In polisher mode, they work on paint correction, wax and sealant application, and surface finishing on vehicles, boats, and other painted surfaces. In sander mode, they handle light material removal and surface prep. Variable speed lets you dial in the right RPM for the pad and the task.
| Model | Kit Contents | Best For | Battery |
|---|---|---|---|
| 2438-20 | Bare Tool | Auto body polishing, light sanding, marine | M12 |
| 2438-22X | Tool + XC Battery | Same as 2438-20, includes battery for first-time buyers | M12 XC |
Auto body technicians and detailers who use these tools appreciate the cordless format. You're not dragging a cord around a vehicle, and you can get into position quickly without worrying about where the outlet is. The variable speed is important here because different pads and compounds work better at different speeds.
M12 FUEL 6" Random Orbital Sanders
The 2584-20 and 2585-20 are the same tool with one important difference: the orbit size. The 2584-20 has a 3/32-inch orbit. The 2585-20 has a 3/16-inch orbit. Both are M12 FUEL tools with brushless motors running a 6-inch pad.
The orbit size determines how aggressive the tool is. A smaller orbit (3/32-inch) produces a finer finish and leaves less visible swirl marks in the surface. A larger orbit (3/16-inch) removes material faster but is more aggressive on the finish. Woodworkers doing final prep before staining or finishing often prefer the 3/32-inch orbit. Those doing rough stock removal or heavy material prep will get faster results with the 3/16-inch.
| Model | Pad Size | Orbit | Best For | Platform |
|---|---|---|---|---|
| 2584-20 | 6" | 3/32" | Fine finish, pre-stain prep, hardwoods | M12 FUEL |
| 2585-20 | 6" | 3/16" | Fast removal, rough stock, aggressive sanding | M12 FUEL |
If you can only pick one, think about what most of your sanding work involves. If you're primarily doing finish work and want a clean surface before applying stain or a topcoat, go with the 2584-20. If you're knocking down material, leveling rough stock, or doing prep work that doesn't need a fine finish, the 2585-20 will get you there faster.
Both tools use the same M12 FUEL platform and the same 6-inch hook-and-loop pads, so switching between them on the same battery system is seamless.
M12 FUEL 1/2" x 18" Bandfile
The 2482-20 is a different kind of tool entirely. It's not a sanding disc or a flat pad sander. It's a bandfile, which uses a narrow 1/2-inch wide by 18-inch long sanding belt. That format is designed for metalwork. Weld blending, deburring, removing scale from fabricated parts, and cleaning up pipe ends and structural steel are the primary applications.
| Model | Belt Size | Application | Platform |
|---|---|---|---|
| 2482-20 | 1/2" x 18" | Weld blending, metalwork, deburring, pipe work | M12 FUEL |
Fabricators, welders, and pipefitters who do metal finishing are the primary users of this tool. The narrow belt can reach into weld joints, along seams, and into tight radii where a disc sander can't fit. The cordless M12 FUEL format makes it a lot easier to work around large fabricated assemblies without dragging a cord.
If your work involves any amount of metal finishing or weld cleanup, this tool fills a gap that none of the disc or pad sanders in the lineup can cover.
Full Lineup Comparison
Here's every Milwaukee cordless sander and bandfile available at RedToolStore.com, side by side.
| Model | Type | Platform | Motor | Best For |
|---|---|---|---|---|
| 2648-20 | 5" Random Orbital | M18 | Standard | General woodworking, surface prep |
| 2837-20 | 5" Random Orbital | M18 FUEL | Brushless | Extended woodworking, finish work |
| 2649-20 | 1/4 Sheet | M18 | Standard | Flat boards, trim, cabinet work |
| 2531-20 | Detail Orbital | M12 FUEL | Brushless | Tight spots, furniture, trim |
| 2438-20 | Polisher/Sander | M12 | Variable Speed | Auto body polish, light sanding |
| 2438-22X | Polisher/Sander Kit | M12 | Variable Speed | Same, includes XC battery |
| 2584-20 | 6" Random Orbital | M12 FUEL | Brushless | Fine finish, pre-stain prep |
| 2585-20 | 6" Random Orbital | M12 FUEL | Brushless | Fast material removal |
| 2482-20 | 1/2" x 18" Bandfile | M12 FUEL | Brushless | Weld blending, metalwork, deburring |
The Sander for the Job
Milwaukee's cordless sander lineup is one of the more complete setups in the market right now. Whether you're doing final prep on hardwood floors, cutting back primer on a vehicle, getting into a furniture joint with a detail sander, or blending welds on a steel fabrication, there's a tool in this lineup that fits the work. The M12 and M18 platforms mean most of these tools share batteries with everything else on your truck or in your shop.
If you're not sure where to start, the battery platform you're already on is usually the best guide. M18 users will get the most out of the 2837-20 for general sanding and the 2649-20 for sheet work. M12 users have a wide selection, from the 2531-20 detail sander all the way up to the 2584-20 and 2585-20 six-inch orbitals. And if metalwork is part of your day, the 2482-20 bandfile is in a category of its own.
Shop All Milwaukee SandersFrequently Asked Questions
What's the difference between the 2584-20 and the 2585-20?
Both are M12 FUEL 6-inch random orbital sanders. The 2584-20 has a 3/32-inch orbit for finer finishing. The 2585-20 has a 3/16-inch orbit for faster material removal. If you're doing finish work before staining or painting, go with the 2584-20. If you need to remove material quickly, the 2585-20 is faster.
Is the 2482-20 a sander or a bandfile?
The 2482-20 is a M12 FUEL 1/2-inch x 18-inch Bandfile. It uses a narrow sanding belt and is designed for metalwork, weld blending, and deburring. It's not a flat sanding pad tool and shouldn't be confused with the disc sanders in the lineup.
What is the 2531-20 detail sander good for?
The 2531-20 M12 FUEL Orbital Detail Sander is built for tight spaces that larger sanders can't reach. It's popular for furniture work, cabinet interiors, trim, and detailed sanding in confined areas. It's not designed for bulk material removal.
Can the 2438-20 be used as a polisher?
Yes. The 2438-20 is a variable speed polisher and sander in one. You can use it for paint correction, wax application, and light polishing on vehicles and marine surfaces, as well as for surface preparation with sanding pads. The variable speed lets you match the RPM to the pad and compound you're using.
What battery platform do Milwaukee cordless sanders run on?
Milwaukee offers sanders on both M12 and M18. The 2648-20, 2837-20, and 2649-20 are M18 tools. The 2531-20, 2438-20, 2438-22X, 2584-20, 2585-20, and 2482-20 are all M12 tools. Both platforms share batteries across all tools in each system, so if you're already invested in one platform, your existing batteries work.
What's the difference between the 2648-20 and the 2837-20?
Both are 5-inch random orbital sanders on M18, but the 2837-20 is the M18 FUEL version with a brushless motor. That means more runtime, more consistent speed under load, and longer motor life. The 2648-20 is the standard M18 version. Both use the same M18 batteries.
What does the 2438-22X kit include?
The 2438-22X is the kit version of the 2438-20 polisher/sander. It includes an M12 XC (extended capacity) battery along with the tool. If you don't already have M12 XC packs, the kit version gets you set up without a separate battery purchase.
Are Milwaukee cordless sanders good enough for professional use?
Yes. The M18 FUEL and M12 FUEL sanders in this lineup are built for daily professional use. The brushless motors on the FUEL models deliver consistent performance and longer tool life. Woodworkers, auto body techs, and finish carpenters use these tools on the job every day.