Patent ID: 8815407
Filing Date: 2014-08-26
Classification: F16C,Y10T

Abstract:
1. A sliding bearing for use with a construction equipment, which comprises a porous iron (Fe) based sintered alloy, wherein: copper is dispersed and contained in the sintered alloy by 13 to 23 wt. %; effective porosity with respect to the whole volume of the sliding bearing is 13 to 23 vol. %; helical shaped unevenness is formed at an inner circumferential surface of the sliding bearing; surface roughness Ra of the inner circumferential surface is 2 to 5 μm; a difference in elevation of the unevenness is in the range from 13 to 30 μm; an interval of the unevenness is in the range from 200 to 290 μm; and surface air holes are opened; wherein an opened hole area ratio, which is a ratio of an area of the air holes to the whole area of the inner circumferential surface at the inner circumferential surface of the sliding bearing, is 13 to 23%.