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Patent Searching and Data


Title:
ROLLER BEARING
Document Type and Number:
Japanese Patent JP2009014126
Kind Code:
A
Abstract:

To inexpensively produce a roller bearing capable of securing a sufficient service life under a condition with foreign substances entrapped.

Before hardening cylinder rollers 7, 7, both axial end edges of these cylinder rollers 7, 7 are chamfered to form round chamfered parts for their whole circumferences. The respective chamfered cylinder rollers 7, 7 are inserted in a barrel 11 and collided with each other on the basis of rotation of the barrel 11 to harden surfaces of these cylinder rollers 7, 7. Thus, the rolling surfaces are hardly damaged even if both the axial end edges of the cylinder rollers 7, 7 and rolling surfaces of the cylinder rollers 7, 7 are collided and the above problem can be solved.


Inventors:
SANNOMIYA HITOSHI
Application Number:
JP2007177868A
Publication Date:
January 22, 2009
Filing Date:
July 06, 2007
Export Citation:
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Assignee:
NSK LTD
International Classes:
F16C33/34; B23P9/04; B24B31/02; C21D1/02; C21D7/06; F16C19/26
Attorney, Agent or Firm:
Takeo Koyama
Takashi Daejeon
Masaki Muto
Kinzo Koyama