The random-orbit motion is what makes these the default sander for most people — it removes stock fast but leaves no swirl marks, so the same tool rough-sands and finish-sands. The differences that matter are dust collection, vibration and whether you want a cord. Here are the picks that earn their keep, by job and budget.
The set-and-forget answer for most shops. Smooth, low-vibration, and its microfilter canister actually catches fine dust instead of throwing it in the air. Variable speed lets you slow down for finish coats and veneer. It's the sander that quietly outlasts three cheaper ones.
Check price on Amazon →A lot of sander for the money. The short body keeps your hand close to the work so it's easy to control, the pad-brake stops swirl-causing over-spin, and DEWALT hook-and-loop discs are everywhere. Not the best dust collection, but pair it with a shop vac and it's hard to beat.
Check price on Amazon →If you already own a battery platform, a cordless sander is a genuine upgrade — no cord to drag across the work, and you can sand a deck or a car panel far from an outlet. Brushless models now have the runtime to matter. Buy the bare tool if you have batteries; the kit if you don't.
Check price on Amazon →For furniture makers and pros chasing a flawless finish. The very low sanding stroke and near-total dust extraction leave a surface ready for finish with almost no visible scratch pattern. Expensive, and overkill for occasional DIY — but a joy if sanding is how you make a living.
Check price on Amazon →Decks, tabletops, doors and drywall go quicker with a 6" pad — more area per pass. The trade-off is size and a little less control in tight spots, so it's a second sander for big jobs rather than a first one. Discs cost a touch more than the standard 5".
Check price on Amazon →| Sander | Pad | Best for | Price tier | |
|---|---|---|---|---|
| Bosch ROS20VSC | 5" hook-and-loop | All-round, best dust for the price | $$ | Amazon → |
| DEWALT DWE6421 | 5" hook-and-loop | Budget, everyday DIY | $ | Amazon → |
| Milwaukee / DEWALT cordless | 5" hook-and-loop | Cord-free, working away from outlets | $$ | Amazon → |
| Festool ETS / Mirka DEROS | 5" low-profile | Pro finish, near-dustless | $$$ | Amazon → |
| 6-inch orbital | 6" hook-and-loop | Large surfaces, faster coverage | $$ | Amazon → |
Three things separate a sander you love from one you fight: dust, vibration, and pad size.
Nearly all of these use hook-and-loop (Velcro-style) discs, so swapping grits takes seconds — just match the disc's hole pattern to your pad's dust holes.
A random orbital sander spins and oscillates in an offset pattern, so it removes material fast and leaves no repeating swirl marks — good for both rough and finish work. A standard "orbital" or quarter-sheet sander only vibrates in tiny circles: gentler and cheaper, but slower and prone to faint swirls. For most people the random orbital is the better single tool.
Depends on the surface. Rough or painted wood often starts around 80 grit, bare smooth wood around 120, and you step up to 180–220 before finishing. Skipping grits leaves scratches — see the sandpaper grit chart for the full progression.
Strongly recommended. Sanding dust is fine enough to hurt your lungs and it clogs the sandpaper, which makes it cut slower. An onboard canister helps; connecting the dust port to a shop vac is best and keeps discs cutting far longer.
5-inch for most work — better control, and discs are cheaper and everywhere. Choose 6-inch only for large flat surfaces like tabletops and decks, where the extra pad area covers ground faster.
Usually too-coarse grit, skipping grits, pressing too hard, or lifting the sander before it stops spinning. Let its weight do the work, move slowly, and step through grits in order. Worn or wrong-hole discs also cause it.