What is "stoneblower"

n. A machine that automatically lifts and packs the sleepers of a railway with small-grade ballast, which is blown under the sleepers to level the track.

A Stoneblower is a railway track Maintenance machine that automatically lifts and packs the sleepers with small grade ballast, which is blown under the sleepers to level the track. An alternative to the use of a Ballast tamper, the totally self-contained machine levels track without the use of a large gang of workmen.