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Koyo RNA4912 — catalogue photograph of the needle roller bearing family

Koyo RNA4912 heavy-duty needle roller bearing

Koyo RNA4912 heavy-duty needle roller bearing: roller bore diameter Fw 68 mm, outside diameter D 85 mm, width 25 mm; cross-references: IKO RNA4912, INA RNA4912.

Heavy-duty needle roller bearings · 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 RNA4912 — catalogue photograph of the needle roller bearing familyKoyo RNA4912 — catalogue drawing of the needle roller bearing familyKoyo RNA4912 — catalogue drawing of the needle roller bearing family
Koyo RNA4912: roller bore diameter Fw 68 mm, outside diameter D 85 mm, width C 25 mm, drawn to scaleFw 68 mmD 85 mmC 25 mm
Drawing: BearingLookup, to the printed roller bore diameter Fw, outside diameter D and width C cited in the specifications below; internal detail is illustrative.

Specifications

Roller bore diameter Fw68 mm
Outside diameter D85 mm
Width25 mm
Basic dynamic load rating Cr64.8 kN
Shaft diameter68 mm
Basic static load rating C0r116 kN
Limiting speed, grease lubrication4100 min-1
Limiting speed, oil lubrication6300 min-1
Mass0.304 kg
Product typeHeavy-duty needle roller bearings without inner rings, metric series

All specifications: Verified printed in Koyo’s own catalogue

Cross-references

PartManufacturerRelationshipEvidence
IKODimensional interchangeSingle source stated by Koyo; not corroborated
INADimensional interchangeSingle source stated 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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