agricultural harvester. it is an agricultural harvester (1) that defines a longitudinal geometric axis (a1) in a harvester travel direction (1) and includes a chassis (2)； and a separation and threshing system (11) carried by the chassis (2). the separation and threshing system (11) includes a concave (23)； an axis (44) defining a rotation (ar) geometry axis that is parallel to the concave (23) and transverse to the longitudinal geometry axis (a1)； and a plurality of vanes (46, 46a, 46b) rotated by the shaft (44) and configured to move harvesting material against the concave (23). the agricultural harvester (1) is distinguished by the fact that the blades (46, 46a, 46b) have a helical shape that meanders around the geometric axis of rotation (air). said plurality of vanes (46a, 46b) includes a first set of vanes (46a) which is predominantly on the left side of the shaft (44) and having a left handed helical shape, and a second set of vanes (46b) which are predominantly on the right side of the shaft (44) and has a right-handed helical shape. at least one vane (46a) of said first vane assembly (46a) is misaligned with respect to a proximal vane (46b) of said second vane assembly (46b) such that a portion of a vane length ( sl) said at least one vane (46a) is overlapped with one or more adjacent vanes (46b) of said second set.colheitadeira agrícola. trata-se de uma colheitadeira agrícola (1) que define um eixo geométrico longitudinal (a1) em uma direção de percurso da colheitadeira (1) e inclui um chassi (2)； e um sistema de separação e debulhamento (11) transportado pelo chassi (2). o sistema de separação e debulhamento (11) inclui um côncavo (23)； um eixo (44) que define um eixo geométrico de rotação (ar) que é paralelo ao côncavo (23) e transversal ao eixo geométrico longitudinal (a1)； e uma pluralidade de palhetas (46, 46a, 46b) giradas pelo eixo (44) e configuradas para mover material de colheita contra o côncavo (23). a colheitadeira agrícola (1) é distinguida p
