US 11,739,788 B2
Crankshaft and method of manufacturing the same
Tatsuhiko Abe, Tokyo (JP); and Manabu Kubota, Tokyo (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/268,807
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
PCT Filed Aug. 22, 2019, PCT No. PCT/JP2019/032880
§ 371(c)(1), (2) Date Feb. 16, 2021,
PCT Pub. No. WO2020/045239, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 2018-162814 (JP), filed on Aug. 31, 2018.
Prior Publication US 2021/0172470 A1, Jun. 10, 2021
Int. Cl. F16C 3/08 (2006.01); B24B 5/42 (2006.01); B24B 21/02 (2006.01)
CPC F16C 3/08 (2013.01) [B24B 5/42 (2013.01); B24B 21/02 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A crankshaft comprising:
a journal; and
a pin,
each of the journal and pin having such a surface geometry that an arithmetical mean height of a primary profile, Pa, is 0.090 μm or smaller and a reduced peak height Rpk is 0.070 μm or smaller,
wherein the arithmetical mean height of a primary profile Pa is defined in JIS B 0601 (2001), and the reduced peak height Rpk is defined in JIS B 0671 (2002).