HIGH-SPEED ROTATION SINGLE ROW CYLINDRICAL ROLLER BEARING

摘要

PPROBLEM TO BE SOLVED: To provide a single row cylindrical roller bearing with a cage of an inner ring guide type, having stable high-speed operation while reducing a lubricant to flow from a gap between an inner ring and an annular portion of the cage to the outside of the bearing. PSOLUTION: The high-speed rotation single row cylindrical roller bearing comprises the annular portion 11 whose inner diameter face is composed of a sectionally tapered portion 11a having a larger diameter at the axial center and a cylindrical guide face 11b opposed to the cage guide face of the inner ring 1 at the axial outside beyond the tapered portion 11a. The bearing adopts such a constitution that a ratio Lw/B of the roller length Lw (mm) of a cylindrical roller 4 to a bearing width B is 0.3Lw/B0.4, the width L (mm) of the annular portion 11 is (B-Lw-1)/2, a width L1 (mm) of the cylindrical guide face 11b is L1L0.2, and an inclination (degree) of the tapered portion 11a to the cylindrical guide face 11b is 10. PCOPYRIGHT: (C)2008,JPO&INPIT