The “straight tooth straight knife” in woodworking milling cutters

Five Straight Tooth Router Bit Features

A straight tooth router bit uses cutting edges that run parallel to the tool axis rather than following a spiral helix. The simple geometry cuts grooves, slots, rebates, pocket walls, and edges in wood, plastics, laminates, composites, and foam. Straight flutes provide balanced side cutting and a neutral chip direction that avoids strong upward or downward pull.

These bits are practical for general routing and easy to resharpen, but chip evacuation may be less efficient than with spiral designs in deep cuts. Choose diameter, cutting length, shank, flute count, carbide grade, and edge relief according to the material and feature. Use shallow passes when grooves are deep, keep projection short, and select speed and feed that produce clean chips without burning. Check collet fit, runout, edge wear, workholding, cutting direction, dust extraction, and fixture clearance. A reliable cutting tool supplier can recommend suitable geometry. Accepted router practices improve accuracy, finish, tool life, and safety.