Walk behind grinding tool with horizontally aligned guides and grinding drum

A grinding system, comprising:

• a grinding tool, comprising:
• a grinding housing comprising a main body and a vacuum shroud hingedly attached to a front of the main body;
• a grinding drum comprising an axle and a blade set mounted thereto, the blade set comprising at least one channel blade and a plurality of milling blades on opposing sides of the at least one channel blade, the axle rotatably coupled to the grinding housing, rotation of the plurality of milling blades defining a mill curvature and a mill radius about a mill axis;
• a pair of guides on opposing sides of the blade set, the pair of guides configured to limit a grinding depth of the grinding drum, each of the pair of guides defining a guiding curvature and a guide radius about a guide axis, at least a portion of the guide curvature being generally concentric with the mill curvature, the guide radius being less than the mill radius;
• a grinding motor attached to a side of the grinding housing and configured to rotate the grinding drum;
• and
• a vacuum comprising a vacuum tube in fluid communication with the vacuum shroud.