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Diamond burnishing tools produce mirrorlike finish

Diamond burnishing tools by Elliott Tool Technology produce a mirrorlike surface finish on linear surfaces in a single pass. Available from Monaghan Tooling Group, the tooling can improve surface irregularities and tool marks, producing surface finishes of 4 to 8 Ra and eliminating secondary processes such as grinding, honing, and polishing by automating those processes in the primary CNC machine.

Diamond burnishing is suitable for a variety of parts and ductile metals under RC 40, including steel, stainless steel, aluminum, and cast iron. According to the company, a cast-iron shaft that started at a preburnished 67-Ra microinch surface finish yielded a 10-Ra microinch finish with a 0.0005-in. material compression in a single pass at 750 SFM.