Burr

Burr is a common defect in machining, referring to tiny, sharp metal protrusions or turned edges left on the edges of metal or non-metal workpieces after cutting, stamping, drilling, milling, etc. In foreign trade, burrs are an important item in quality inspection, especially for precision parts, hardware tools, auto parts, medical devices, etc. Usage scenarios include: quality clauses in contracts, inspection reports, customer complaints, technical specifications, etc. Note: Burrs may affect assembly, cause personal injury, reduce product life, and even lead to returns or claims. Different customers have different acceptance standards for burrs; the allowed burr size, location, and removal process (such as deburring, chamfering, polishing) must be specified in the order. Difference from 'Flash': Flash mostly refers to thin sheet-like excess material produced at the parting line during forging or injection molding, while burr emphasizes small protrusions on the machined edge. Difference from 'Sharp Edge': A sharp edge is a sharp edge formed by design or machining, while a burr is an accidentally produced defect. Foreign trade practitioners should specify burr acceptance standards in contracts to avoid disputes caused by differences in understanding.