Roller fall prevention tool and bearing with roller fall prevention tool

Abstract

A roller drop-prevention element (1) is provided, which is attached to a bearing (11) in which rollers (13) can fall out towards the radially inner side of a cage (12). The roller drop-prevention element (1) comprises conical sections (2) formed at both axial ends on the outer circumferential surface of the roller drop-prevention element (1) and having an entry angle of less than 45 degrees relative to the bearing (11); and a straight section (3) formed on the outer circumference of the axial central section of the roller drop-prevention element (1) to form a cylindrical surface extending parallel to the central axis. The roller drop-prevention element (1) has four or more first slots (4) extending from one of its axial end surfaces; and four or more second slots extending from the other axial end surface and alternating with the four or more first slots (4) at uniform circumferential intervals.When mounting the roller fall protection element (1) on the bearing (11), the small-diameter end of one of the conical sections (2) is fitted into the inscribed circle of the rollers (13), and the straight section (3) is placed against the rollers (13). When removing the roller fall protection element (1) from the bearing (11), a shaft or inner ring is placed against the ribs (5) that extend axially on the radially inner surface of the roller fall protection element (1).

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