KOYO Bearing RNA6904

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Specifications of KOYO Bearing RNA6904

KOYO Bearing RNA6904

(Boundary dimensions …etc)

25 mm
37 mm
30 mm
0.3 mm
Basic load ratings : Cr
36.6 kN
Basic load ratings : C0r
51.0 kN
Fatigue load limit : Cu
7.95 kN
Limiting speeds(Grease lub.)
12000 min-1
Limiting speeds(Oil lub.)
18000 min-1

Mounting dimensions


0.091? kg

Product description of KOYO Bearing RNA6904

KOYO Heavy-duty needle roller bearings Metric series, caged, without inner ring, KOYO Bearing RNA6904, Needle roller bearings have a small cross-sectional height therefore contribute to keeping the overall machine lightweight and compact. As such, they are used across a broad scope, including cars, motorcycles, electric machinery, machine tools, aerospace devices, office equipment and other industrial machinery. KOYO heavy duty needle roller bearings are well suited to applications where shaft misalignment and higher speeds exceed the capabilities of full complement needle roller bearings. Our CMR bearings are comprised of an outer housing, a precision tubular cage and a set of precision ground needle rollers. We take pride in the fact that all of the manufacturing, heat treatment, grinding and assembly, of our precision CMR outer races, takes place right here in Michigan.

Our KOYO bearings are dimension-ally interchangeable with McMillan, RBC and other heavy-duty needle roller bearings, allowing you to take advantage of KOYO Manufacturing’s product quality and availability. KOYO Heavy-duty needle roller bearings Metric series, caged, without inner ring, KOYO Bearing RNA6904,Based on the theory of structural modeling and finite element static analysis,combining Solid works and ANSYS Work-bench together,the whole process from a heavy-duty truck drive-line wheel side reducer needle bearing to the three-dimensional finite element analysis modeling is completed,and based on this,wheel side reducer needle roller bearing stress distribution and deformation results are obtained,the weak links in the design are identified,a basis to suggest improvements is provided.

KOYO Heavy-duty needle roller bearings Metric series, caged, without inner ring, KOYO Bearing RNA6904,The demands made of technical surfaces can often be fully met only by use of a specially-chosen combination of materials. Thermally sprayed coatings, thanks to the wide range of materials which can be applied by this means, are commonly used in a wide range of applications for functionalism, as well as wear- and corrosion-resistance. By combining various materials and coating techniques such as thick film and thin-film coatings, optimal coatings can be achieved for any given surface or component characteristics. Described here is an approach to achieving a dry-running tribe system for power transmission. This demand was met in the case of a tribe-system with dry-running requirements by using a selected combination of different materials and coating technologies for both the mating surfaces in question.

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