the.com/belt sander

means A power sanding tool with a motor-driven loop of abrasive belt that spins continuously to strip material off a surface quickly.

from Straightforward compound: 'belt' for the continuous looped band of abrasive paper running around two rollers, and 'sander' from 'sand,' since sandpaper's abrasive grit was traditionally crushed sand or similar mineral glued to backing paper. The tool itself is a 20th-century industrial-era invention, born once electric motors became small and powerful enough to drive a fast-moving abrasive loop for woodworking and metalworking.