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Patent Searching and Data


Title:
BALL BEARING, AND MACHINE TOOL SPINDLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/034246
Kind Code:
A1
Abstract:
In an angular ball bearing (10), an outer race (12) has at least one diameter-directional hole (15) that supplies lubricating oil and passes through from the outer circumferential surface to the inner circumferential surface along the diameter direction. In a cross-section taken along the axial direction passing through a center (O) of the ball (13), the axial-directional position of a line extending through a central axis (X) of the diameter-directional hole (15) in the outer circumferential surface of a retainer (14) is located between an intersection position (A), at which an outer circumferential surface (14a) of the retainer (14) and a surface of a ball (13) intersect, and an axial-directional end (B) of a pocket (P).

Inventors:
MATSUNAGA KYOHEI (JP)
KATSUNO YOSHIAKI (JP)
Application Number:
JP2017/029165
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; F16N7/32
Foreign References:
DE102007034023A12009-01-22
JPS63180726U1988-11-22
JP2013079711A2013-05-02
DE102014212620A12015-12-31
DE102012222626A12014-06-12
JP2016516969A2016-06-09
JP2016142393A2016-08-08
Other References:
See also references of EP 3499066A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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