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Koyo RNA4904 — catalogue photograph of the needle roller bearing family

Koyo RNA4904 needle roller bearing inner ring

Koyo RNA4904 needle roller bearing inner ring: roller bore diameter Fw 25 mm, outside diameter D 37 mm, width 17 mm; cross-references: IKO RNA4904, INA RNA4904.

Needle roller bearing inner rings · All Koyo part numbers

Figure © Koyo, clipped unaltered from Koyo Ball & Roller Bearings catalog B2001E-6 — Standard Bearings section (B2001E-6b). It illustrates the product family printed there, which may include other sizes. Removed on request.

Koyo RNA4904 — catalogue photograph of the needle roller bearing familyKoyo RNA4904 — catalogue drawing of the needle roller bearing familyKoyo RNA4904 — catalogue drawing of the needle roller bearing family

Specifications

Roller bore diameter Fw25 mm
Outside diameter D37 mm
Width17 mm
Basic dynamic load rating Cr21.3 kN
Shaft diameter25 mm
Basic static load rating C0r25.5 kN
Limiting speed, grease lubrication12000 min-1
Limiting speed, oil lubrication18000 min-1
Mass0.061 kg
Product typeHeavy-duty needle roller bearings without inner rings, metric series

All specifications: Verifiedprinted in Koyo’s own catalogue

Cross-references

PartManufacturerRelationshipEvidence
IKODimensional interchangeSingle sourcestated by Koyo; not corroborated
INADimensional interchangeSingle sourcestated by Koyo; not corroborated

Koyo: 'Dimensional interchangeability only. This does not imply interchangeable in all respects.' (Metric NRB Interchange Guide p18)

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