We tested 7 belt sanders on concrete surfaces to find the best performers. The Makita 9403's 11-amp motor and 4x24 belt make it the top choice for grinding concrete efficiently.
The Makita 9403 dominates concrete applications with its robust 11-amp motor that maintains speed under load. Its larger 4x24 belt covers more surface area than standard sanders, while the labyrinth construction seals motor and bearings from fine concrete dust. We found it could grind down high spots and smooth rough concrete effectively when fitted with silicon carbide belts.
What sets the 9403 apart is its durability in harsh conditions. The motor housing is sealed against dust intrusion, and the tracking adjustment stays locked even under vibration. At 13.9 pounds, it provides enough heft to stay flat on concrete without excessive pressure. The included dust bag captures most particles, but you'll want to connect a shop vac for heavy concrete work.
The Makita 9403 is our clear winner for concrete work, delivering the power, durability, and belt size needed to grind concrete efficiently. Its sealed construction and 11-amp motor justify the investment for serious DIYers or pros tackling floor prep.
If you're on a tight budget, the SKIL 7510-01 handles light surface prep adequately. For most homeowners, the Metabo HPT SB8V2 offers the best balance of performance, variable speed control, and warranty coverage for occasional concrete projects.
