The Milwaukee 2648-20 is an 18V cordless 5-inch random orbit sander sold as a bare tool, so it runs on the M18 batteries you already own. It reaches 12,000 orbits per minute with a 7,000-12,000 variable speed dial, and Milwaukee rates it at up to 35 minutes of runtime on a 3.0Ah pack. It suits woodworkers and remodelers already in the M18 system who want corded-class stock removal without a cord. Against corded 5-inch sanders it trades unlimited runtime for portability; against other cordless sanders it is known for strong removal but heavy battery draw.
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Owners treat the 2648-20 as one of the stronger cordless random orbit sanders, praising its removal rate and speed control. The common complaints are battery runtime and the bare-tool packaging.
The Milwaukee M18 5" Random Orbit Sander is a cordless sander that runs on M18 batteries. It reaches up to 12,000 OPM, and a variable speed dial adjusts the orbit speed from 7,000 to 12,000 OPM to suit the application. The motor is built to remove more material per battery charge.
It has a 5" sanding pad with a quick-change hook-and-loop surface and a 3/32" orbit diameter. A dust canister with a filter is included, along with a universal hose adapter for dust collection. With an M18 3.0Ah battery pack, run-time is up to 35 minutes. This is a bare tool, so the battery is sold separately. The sander is part of the M18 system of more than 150 tools.
