Nsk Corporation

Masatake Ichimaru

Toshiyuki Tanaka

Takashi Murai

Yuko Kamamura

Yukio Ooura

Yoshiro Ide

There is realized a self-aligning roller bearing with retainer that stabilizes the orientation of spherical rollers and prevents these spherical rollers from skewing, and which can be rotated at high speed, and furthermore which enables efficient lubricant feed into pockets By rotating a turning toolas it revolves, the surfaces on both sides in the circumferential direction of respective column sections are processed into concave curved surfaces that oppose a rolling surface of the respective spherical rollers across a pocket clearance into which lubricant oil can be fed. The length of the column sectionsis less than the length in the axial direction of the spherical rollers, and greater than a half of the length, and an end portion of the side surface in the circumferential direction of the respective column sectionsprojects further in the circumferential direction than an intermediate portion thereof, and the spherical rollers are embraced in the pockets

Self-aligning roller bearing with retainer and manufacturing method for self-aligning roller bearing retainer

A roller bearing includes an inner ring, an outer ring, a plurality of cylindrical rollers each provided between rolling contact surfaces of the inner ring and the outer ring. Each of the cylindrical rollers includes an end face having a peripheral part that is crowned. A flange portion is formed at an outer circumferential face end part of the inner ring and/or an inner circumferential face end part of the outer ring. The peripheral part is crowned in a curving shape represented by an exponential function of y=a&#xb7;exp(&#x2212;b&#xb7;x); where a and b are constants, x is a distance from the rolling contact surface in a radial direction of the cylindrical roller, and y is a crowning fall-off amount from a central part of the end face of the cylindrical roller in an axial direction of the cylindrical roller.

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Fujisawa, Japan

Masatake Ichimaru