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KOYO / Single-row / inch series

KOYO 25877R/21

Tapered roller bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
34.925 mm
Outside diameterD
73.025 mm
WidthB
24.608 mm
Dynamic load ratingC
90.1 kN
Static load ratingC0
87.3 kN
Limiting speednG
5600 r/min

Use this page as a technical reference. Verify the current manufacturer specification and the complete application requirements before selection.

Technical data

Product specifications

Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.

Core specifications9 parameters
Core specifications
ParameterSymbolValue
Variant / constructionSingle-row / Inch series
Bore diameterd34.925 mm
Outside diameterD73.025 mm
WidthB24.608 mm
Basic dynamic load ratingC90.1 kN
Basic static load ratingC087.3 kN
Fatigue load limitPu13.1 kN
Limiting speednG5600 r/min
Mass≈m0.475 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key050-010-020
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathTapered roller bearings - Single-row - Inch series
Official Classification 1Tapered roller bearings / Single-row / Inch series
Technical Data23 parameters
Technical Data
ParameterSymbolValue
d34.925 mm
D73.025 mm
T23.812 mm
B24.608 mm
C19.050 mm
R(Min.)1.6 mm
R1(Min.)0.8 mm
Basic Load Ratings : Cr90.1 kN
Basic Load Ratings : C0R87.3 kN
Fatigue Load Limit : Cu13.1 kN
Limiting Speeds(Grease Lub.)5600 min-1
Limiting Speeds(Oil Lub.)7400 min-1
Load Center Spread : A15.8 mm
Constant :E0.29
Axial Load Factors : Y12.07
Axial Load Factors : Y01.14
Da43.0 mm
Db40.5 mm
Da65.0 mm
Db68.0 mm
Ra(Max.)1.6 mm
Rb(Max.)0.8 mm
Mass(Refer.)0.475 kg

Technical documents & data sheet

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Record identity
KOYO 25877R/21
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