Secondary Operations for Finished, Inspected, and Ready-to-Ship Metal Parts

Deburring removes burrs and sharp protrusions created by cutting, stamping, or machining. The goal is safety, cosmetics, and preventing issues like poor fit-up or gauge interference. It’s essentially corrective removal of imperfections, using methods such as hand tools (files, scrapers, abrasive paper), thermal deburring for complex geometries, or electrochemical/vibratory deburring for production volumes.

Edge rounding intentionally reshapes a sharp edge into a controlled radius to improve stress distribution, reduce stress concentration, and improve durability. It’s intentional edge shaping, typically done with chamfer tools/countersinks (CNC), hand deburring tools, grinding wheels, or abrasive media.

For acceptance (aligned with ISO 13715), deburred edges should be free of noticeable burrs and sharpness, with smooth transitions and no “bite” when touched. Typical burr-height limits may be ≤0.05 mm, and ≤0.02 mm for precision parts. Surface finish requirements after deburring may also be specified—for example Ra ≤ 1.6 μm, and Ra ≤ 0.8 μm on critical mating surfaces. For edge rounding, the radius should be uniform and smooth and meet the drawing requirement; if not specified, common edge-break radii are around 0.1–0.3 mm, sufficient to eliminate sharp edges without compromising fit or safety.