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US 5,672,014 AGranted
Rolling bearings
AssigneeNsk Ltd.
InventorsShigeru Okita, Nobuaki Mitamura, Susumu Tanaka, Kenji Yamamura, Manabu Ohori
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AssigneeNsk Ltd.
InventorsShigeru Okita, Nobuaki Mitamura, Susumu Tanaka, Kenji Yamamura, Manabu Ohori
Estimating the term…
A rolling bearing has components of an inner race, an outer race and rolling elements, one of the components being formed of an alloy steel containing 0.1-1.0 wt % of C, 0.1-1.5 wt % of Si, 0.1-1.5 wt % of Mn and 0.1-3.0 wt % of Cr, the alloy steel being carbonitrided and then ground to form a surface layer having a carbon and a nitrogen concentration of 0.6-1.5 wt % and 0.05-0.9 wt %, respectively. The surface layer has an appropriate amount of retained austenite .gamma..sub.R and is sufficiently hard to insure long life even under lubrication in the presence of foreign matter. By optimizing the choice of constituent materials, processing methods and heat treatments for each of the rolling elements and the inner and outer races, rolling bearings that have high performance can be produced at low cost.
A rolling bearing comprising components of an inner race, an outer race and a plurality of rolling elements, wherein the rolling elements are formed of a first alloy steel consisting essentially of:
A rolling bearing comprising components of an inner race, an outer race and a plurality of rolling elements, wherein the rolling elements are formed of a first alloy steel consisting essentially of:
A rolling bearing comprising components of an inner race, an outer race and a plurality of rolling elements, wherein at least one of the components is formed of an alloy steel consisting essentially of:
A rolling bearing comprising components of an inner race, an outer race and a plurality of rolling elements, wherein at least one of the components is formed of an alloy steel consisting essentially of:
Dependencies are inferred from the claim text.