A belt sander carries a continuous abrasive belt across a longer platen, while a random-orbit sander uses a round disc with a random-orbit action. DEWALT's DCW220B accepts a 3-by-21-inch belt and has a variable-speed trigger with a 25-position dial; Makita's BO5030K uses 5-inch, 8-hole hook-and-loop discs at 12,000 OPM. Choose by contact area, finish task and abrasive format.
The abrasive format changes the working footprint. A belt sander moves a continuous strip around its platen; a random-orbit sander spins a round disc through a random-orbit action. Compare the area and contour you need to reach, then check the belt or disc size before buying.
Compare the format and controls
| Tool | What to check |
|---|---|
| Belt sander | Belt width and length; belt tracking and replacement; platen footprint; speed control; dust port; clearance around edges and corners. |
| Random-orbit sander | Disc diameter and hole pattern; hook-and-loop or other attachment; orbit action; speed range; pad availability; dust collection path. |
Model specifications are not category-wide promises. DEWALT’s DCW220B is a cordless 3-by-21-inch belt sander with a variable-speed trigger and 25-position dial. The manufacturer describes it for material-removal applications and offers an AirLock-compatible dust collection system. Makita’s BO5030K is a corded 5-inch random-orbit sander with 1/8-inch orbit action, 12,000 OPM and 5-inch, 8-hole hook-and-loop discs. It includes a dust bag and through-the-pad collection system.
Select by the surface and abrasive supply
For a broad, flat surface or material-removal task, compare the belt sander’s platen size, speed settings and the maker’s allowed application. A round-pad sander fits a different contact area; compare the model’s pad diameter, orbit action and available grits for the work. Neither format substitutes for the right abrasive: follow the tool and sandpaper instructions for material, grit changes and pressure.
Check the dust port or bag, compatible extractor, replacement abrasive cost and whether the tool is corded or on a battery platform you already use. For grinding and cutting discs, see angle-grinder wheel types and safety. For dust exposure on construction tasks, read silica controls and respirators; that guide covers OSHA silica rules, not every sanding material. Browse grinders, sanders and routers.
Dust and safe operation
Use the dust-control setup stated by the tool maker, keep guards and collection parts in place as instructed, and wear the PPE required for the material and task. OSHA requires employers to provide PPE appropriate to hazards including harmful dust, fumes and mists during construction work. Follow the sander manual and site exposure-control plan.
Sources: DEWALT DCW220B belt sander, Makita BO5030K random-orbit sander, and OSHA 29 CFR 1926.300.
Common questions
Which sander removes more material?
DEWALT describes the DCW220B belt sander for material-removal applications. The result depends on the tool, abrasive, material and speed, so check the maker's limits for the exact setup.
Can a random-orbit sander leave swirl marks?
Finish depends on the tool, abrasive, surface and technique. Makita describes the BO5030K as using a 1/8-inch random orbit for smooth sanding, but that model claim is not a guarantee for every setup.
Are sanding belts and discs interchangeable?
No. Match the abrasive dimensions and attachment method to the sander. The DEWALT DCW220B uses a 3-by-21-inch belt; the Makita BO5030K uses 5-inch, 8-hole hook-and-loop discs.
What should I check for dust collection?
Check the sander's port or dust-bag system and the extractor compatibility stated by its maker. Follow the task-specific dust controls and PPE requirements.