Title:
ANGULAR BALL BEARING
Document Type and Number:
WIPO Patent Application WO/2024/075554
Kind Code:
A1
Abstract:
Provided is an angular ball bearing that reduces the amount of heat generated, suppresses separation originating from inclusions even if surface pressure at contact sites becomes high, is low in cost, and has long life. This angular ball bearing comprises: an inner race that has an inner raceway groove with a circular-arc-shaped cross-section in an outer peripheral surface; an outer race that has an outer raceway groove with a circular-arc-shaped cross-section in an inner peripheral surface; and a plurality of balls disposed so as to be able to roll between the inner raceway groove and the outer raceway groove. The groove curvature radius ratio Ri of the inner raceway groove to the ball diameter is 54–57%, the groove curvature radius ratio Ro of the outer raceway groove to the ball diameter is 51–58%, and at least the inner race and the outer race comprise alloy steel that includes 0.85–1.15% by mass of carbon, 0.40–0.90% by mass of silicon, 0.55–1.20% by mass of manganese, 1.30–1.90% by mass of chromium, 0.30% by mass or less of molybdenum, 0.30% by mass or less of nickel, 0.20% by mass or less of copper, 0.025% by mass or less of sulfur, 0.020% by mass or less of phosphorus, and 15 ppm by mass or less of oxygen, with the remainder being iron and unavoidable impurities.
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Inventors:
IWASAKI KAZUMI (JP)
SOGA SHUJI (JP)
NOMOTO HYOMA (JP)
MAEDA YOSHINORI (JP)
SOGA SHUJI (JP)
NOMOTO HYOMA (JP)
MAEDA YOSHINORI (JP)
Application Number:
PCT/JP2023/034605
Publication Date:
April 11, 2024
Filing Date:
September 22, 2023
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C33/58; F16C19/16; F16C33/62
Foreign References:
| JP2004124953A | 2004-04-22 | |||
| JP2014122378A | 2014-07-03 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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