Rolling bearing in aircraft

Details Rolling bearing in aircraft Rolling bearing in aircraft

2007-05-08

2007-05-08

Footland, Lenard A. (Department: 3682)

Bearings

Rotary bearing

Antifriction bearing

C384S492000

Reexamination Certificate

active

10533043

ABSTRACT:
A single-row or multi-row rolling bearing comprising thin-walled bearing races which are made of a martensitic, through hardened steel and have the following characteristics: a surface hardness of ≧613 HV (56 HRC) in the area of the bearing face; a core hardness of ≧285 HV (28 HRC); a difference of ≧150 HV (9 HRc) between the surface hardness and the core hardness. The core hardness is reached at a depth ranging between 8 percent of the diameter of the rolling elements and 90 percent of the wall thickness on the bottom of the track. There is a ratio of ≧20 between the diameter of a pitch circle Tkand the diameter of a rolling element DW.

REFERENCES:
patent: 5507580 (1996-04-01), Dezzani et al.

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