Classification and selection of bottom cleaning knives

Seven Bottom Cleaning Knife Selection Tips

Bottom cleaning knife selection determines how efficiently a router or CNC machine can flatten pockets, clear large recessed areas, level spoilboards, and produce smooth horizontal surfaces. The correct cutter balances material removal rate, cutting force, finish, chip evacuation, and machine power without leaving ridges, burning, or excessive vibration.

Seven key factors are cutter diameter, edge geometry, shank size, cutting length, pocket depth, workpiece material, and required finish. Larger diameters cover more area but need greater rigidity and power. Replaceable inserts simplify maintenance, brazed carbide offers a robust cutting edge, and solid-carbide designs suit smaller precision work.

Complete bottom cleaning knife selection by checking spindle capacity, holder clearance, tool projection, overlap, stepdown, and toolpath direction. Use accurate collets, secure workholding, and speed and feed settings that create healthy chips. A trusted cutting tool supplier can recommend suitable diameter and edge material. General woodworking router principles also help control dust, heat, surface flatness, wear, and safe machining.