Pivot for hydrodynamic bearing

Abstract

This document relates to a pivot (20) for a hydrodynamic bearing capable of being rotated about a longitudinal axis (X), said pivot (20) comprising: a radially internal portion (22) extending axially and about the longitudinal axis (X), a shaft (25) arranged about said radially internal portion (22), characterized in that the shaft (25) is a truncated cylinder having a solid portion (26) and at least one truncated portion (30, 30-1, 30-2) defined by an average truncation depth (RT) and a truncation surface (32, 32-1, 32-2), said at least one truncated portion (30, 30-1, 30-2) opening onto the truncation surface (32, 32-1, 32-2), the truncation surface (32, 32-1, 32-2) comprising a truncation curve segment (CT) average angle between 2° and 180° and an average truncation length (LT) between 5% and 100% of the tree length (25). Abstract figure: Figure 2