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US 9,316,253 B2Granted
Sintered bearing
AssigneeNtn Corporation
InventorsKazuo Okamura, Fuyuki Ito
Life of this patent
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Abstract
A maximum diameter (d) of each of surface openings formed in a bearing surface through melting of Sn metal powder as a binder is set within a range of 0 μm<d≦25 μm. In order to attain the range, binder metal powder having a maximum particle diameter of 25 μm or less is used.
Claims4
A sintered bearing obtained by sintering mixed powder containing main component metal powder and
- binder metal powder, wherein the main component metal powder has a higher melting point than the sintering temperature, and the binder metal powder has a lower melting point than the sintering temperature,
- the sintered bearing comprising inner holes impregnated with a lubricating oil,
- wherein a maximum diameter d of each of surface openings formed in a bearing surface falls within a range of 0 μm<d≦25 μm,
- wherein a maximum particle diameter of the binder metal powder is from 10 μm to 25 μm,
- wherein a maximum particle diameter of the main component metal powder is greater than the maximum particle diameter of the binder metal powder, and
- wherein a minimum particle diameter of the mixed powder is more than 10 μm.
3 more elements
Dependencies are inferred from the claim text.