Why Standard Tungsten Carbide Burrs Load Solid on Aluminum Within Seconds
In twelve years of working with fabrication and mold shops, a consistent observation is that a double-cut carbide burr which performs adequately on steel becomes unusable on aluminum after only a short period of contact. The flutes fill with adhered metal, cutting stops, and further pressure simply generates heat and smears the surface. The cause is the interaction between chip size, flute openness, and the tendency of aluminum to soften and stick under frictional heat.