Machine part

Details Machine part Machine part

1997-07-18

1999-03-23

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428156, 428457, 428469, 428472, 428698, F16H 5306

Patent

active

058856900

ABSTRACT:
A machine part has a rolling contact surface (11a) having a lot of very small recesses which are independent of each other. The maximum height (Ry) of a roughness profile (R) obtained by cutting the contact surface (11a) by a plane perpendicular to the contact surface (11a) is 1 to 3 .mu.m. The reduced peak height R.sub.PK obtained on the basis of a load curve M obtained from the roughness profile R satisfies the relationship of R.sub.PK /Ry<0.1 with the maximum height Ry. In this case, the contact surface has very small recesses which are sparsely distributed but are deep, so that it is relatively smooth near its surface. A sufficiently large contact area is ensured by the smooth portion near the surface, and an oil sump in a sufficient amount is formed by the very small recesses which-are sparsely distributed but are deep.

REFERENCES:
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patent: 5503481 (1996-04-01), Hashimoto et al.
patent: 5641038 (1997-06-01), Akamatsu
patent: 5642947 (1997-07-01), Akamatsu et al.

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