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The document provides precise numerical values for safety distances. It does not rely on vague instructions like "keep hands away"; rather, it calculates the exact distance required to prevent an operator from reaching a danger zone (like a saw blade or a crushing point) based on the dimensions of the human body.

ISO 13857:2019 - Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs. ISO 13857: ISO - International Organization for Standardization ISO 13857:2019(en), Safety of machinery iso 13857 pdf download

Specifies the required distance based on the size and shape of openings in guards (e.g., slots, squares, or circles). The document provides precise numerical values for safety

Tables (e.g., Table 1 and Table 2) link the height of the hazard and the height of the protective structure to determine the required horizontal safety distance. or circles). Tables (e.g.