BALL BEARING, BALL BEARING DEVICE, AND MACHINE TOOL

Title:

BALL BEARING, BALL BEARING DEVICE, AND MACHINE TOOL

Document Type and Number:

WIPO Patent Application WO/2018/034240

Kind Code:

A1

Abstract:

In an angular contact ball bearing (10), an outer ring (12) has at least one radial hole (15) passing through in the radial direction from the outer peripheral surface to the inner peripheral surface of the outer ring (12), and the axial-direction position of an inner-diameter-side opening part of the radial hole (15) is located between the groove bottom of the outer ring (12) and the point of contact between a ball (13) and the outer ring (12), as well as being separated from a contact ellipse between the ball (13) and an outer ring track groove (12a).

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Inventors:

MATSUNAGA KYOHEI (JP)
KATSUNO YOSHIAKI (JP)

Application Number:

PCT/JP2017/029153

Publication Date:

February 22, 2018

Filing Date:

August 10, 2017

Export Citation:

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Assignee:

NSK LTD (JP)

International Classes:

F16C33/66; B23B19/02; F16C19/16; F16C19/18; F16C19/28; F16C33/78; F16J15/10; F16N7/32

Domestic Patent References:

WO2008065942A1

2008-06-05

Foreign References:

JPH01149020U	1989-10-16
JP2016142393A	2016-08-08
JP2013079711A	2013-05-02
JPS60103725U	1985-07-15

Other References: