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Koyo RNA4903 — catalogue photograph of the needle roller bearing family

Koyo RNA4903 needle roller bearing inner ring

Koyo RNA4903 needle roller bearing inner ring: roller bore diameter Fw 22 mm, outside diameter D 30 mm, width 13 mm; cross-references: IKO RNA4903, INA RNA4903.

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 RNA4903 — catalogue photograph of the needle roller bearing familyKoyo RNA4903 — catalogue drawing of the needle roller bearing familyKoyo RNA4903 — catalogue drawing of the needle roller bearing family

Specifications

Roller bore diameter Fw22 mm
Outside diameter D30 mm
Width13 mm
Basic dynamic load rating Cr12.2 kN
Shaft diameter22 mm
Basic static load rating C0r16.4 kN
Limiting speed, grease lubrication13000 min-1
Limiting speed, oil lubrication20000 min-1
Mass0.025 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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