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Patent Searching and Data


Title:
BEARING DEVICE FOR MAIN SPINDLE OF MACHINE TOOL
Document Type and Number:
Japanese Patent JP2006326695
Kind Code:
A
Abstract:

To provide a bearing device for a main spindle of a machine tool which can suppress the temperature rise of a bearing on the front side during the high-speed rotation, can maintain machining accuracy, and can suppress the increase in cost for preventing the temperature rise.

The main spindle 3 is supported with the bearing 4 on the front side and a bearing 5 on the rear side in the bearing device for a main spindle of a machine tool. Front and rear roller bearings 4A-4D respectively having contact angles θ1-θ4 are arranged back-to-back as the bearing 4 on the front side. The rolling elements 23 only in the front roller bearings 4A, 4B in the bearing 4 on the front side are made of ceramics.


Inventors:
TAKO HIROSHI
Application Number:
JP2005000149242
Publication Date:
December 07, 2006
Filing Date:
May 23, 2005
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD
International Classes:
B23B19/02; F16C19/16; F16C19/54; F16C25/06; F16C33/32
Attorney, Agent or Firm:
野田 雅士
杉本 修司