Milwaukee M18 Random Orbit Sander 2648-20: problems, parts and running costs

Checked: 2026-10-09

Summary

The 2648-20 is a 5-inch cordless random orbit sander for Milwaukee’s M18 platform, sold tool-only at $149 at Home Depot and Acme Tools, and the complaint owners repeat most is dust collection: the canister collects little and pops off mid-job. Running costs are sanding discs and the dust box filter, plus the M18 battery and charger if you do not own them — about $99 for a CP2.0 or $169 for an XC5.0. At $149 it is a good buy for existing M18 owners; without M18 batteries the total passes $300 and the brushless FUEL 2837-20 becomes the better call.

Common problems and fixes

Hand fatigue and jumping on long jobs — the same Reddit thread describes the sander as “awful to use” after about an hour and “jumping around” more than a Craftsman sander; no fix is reported. [6]
Battery life depends on the pack fitted — a CP2.0 handles “a couple doors or drawers, but not a whole cabinet” while an XC5.0 gives “plenty of life,” and Milwaukee claims up to 35 minutes on a 3.0 Ah battery. [4][1]
Brushed motor is the older design — the 2648-20 is non-FUEL; the brushless FUEL 2837-20 is the upgrade and is cited as a significant improvement. [2][6]
Bare tool, so the total can pass $300 — no battery or charger in the box; a CP2.0 is about $99 and an XC5.0 about $169 before any charger. [1][11][3]
Combustible dust can build up in the box — the manual warns that dust from polyurethane and linseed-oil finishes can self-ignite, and tells you to empty the dust box every 10–15 minutes and never store the sander with a loaded box. [9]

Parts and consumables

Yearly running cost

Not enough data as a yearly total. The consumables are sanding discs and the dust box filter and the tool runs on an M18 battery, but the research found no disc or filter prices, no replacement intervals and no electricity figures, so no yearly total could be computed. Buyers without M18 packs should treat a CP2.0 battery at about $99 or an XC5.0 at about $169 as a one-time add-on rather than a yearly cost. [11][10]

When it is a good buy

$149 bare tool at Home Depot and Acme Tools (research check October 2026); at launch in 2018 the bare tool was $99 and the 2648-21 kit was $199. [12][3][5]
At $149 with M18 batteries already owned, it is a sensible general-purpose cordless sander, and the 5-year warranty and available service parts help. [8][10]
Without M18 batteries, the total with battery and charger can pass $300, and Milwaukee’s own FUEL 2837-20 or a competing kit is the better call. [11][2][6]
Milwaukee M18 FUEL 2837-20 — the better choice when dust collection, ergonomics and a brushless motor matter enough to pay more. [2][6][4]
Milwaukee 2648-21 kit — the better choice when you do not own M18 batteries; it adds a 3.0 Ah XC battery, a multi-voltage charger and a contractor bag. [1][5]