Title:
MACHINE TOOL MAIN SPINDLE
Document Type and Number:
Japanese Patent JP2004249439
Kind Code:
A
Abstract:
To prevent the stagnation of a cooling oil to improve cooling efficiency in a machine tool main spindle having spiral grooves for flowing the cooling oil in the mating face of a double housing.
Peripheral grooves 2, 4 are provided at both end of the spiral groove 6, a cooling oil inlet 8 is provided at one peripheral groove 2, a cooling oil outlet 10 is provided at the other peripheral groove 4, the cooling oil inlet 8 is positioned ahead of the starting point 12 of the spiral groove 6 relative to the flow of the cooling oil, and the cooling oil outlet 10 is positioned behind the finishing point 14 of the spiral groove 6 relative to the flow of the cooling oil.
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Inventors:
YAMAMOTO YUKIMITSU
Application Number:
JP2003044454A
Publication Date:
September 09, 2004
Filing Date:
February 21, 2003
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
B23Q11/12; (IPC1-7): B23Q11/12
Attorney, Agent or Firm:
Shogo Ehara
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano
Hiroaki Yamane
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano
Hiroaki Yamane
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