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KOYO / Single-row / inch series

KOYO 681/672

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

Technical data available
Bore diameterd
92.075 mm
Outside diameterD
168.275 mm
WidthB
41.275 mm
Dynamic load ratingC
282 kN
Static load ratingC0
349 kN
Limiting speednG
2200 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 diameterd92.075 mm
Outside diameterD168.275 mm
WidthB41.275 mm
Basic dynamic load ratingC282 kN
Basic static load ratingC0349 kN
Fatigue load limitPu50.4 kN
Limiting speednG2200 r/min
Mass≈m3.83 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
d92.075 mm
D168.275 mm
T41.275 mm
B41.275 mm
C30.162 mm
R(Min.)3.6 mm
R1(Min.)3.2 mm
Basic Load Ratings : Cr282 kN
Basic Load Ratings : C0R349 kN
Fatigue Load Limit : Cu50.4 kN
Limiting Speeds(Grease Lub.)2200 min-1
Limiting Speeds(Oil Lub.)3000 min-1
Load Center Spread : A38.6 mm
Constant :E0.47
Axial Load Factors : Y11.28
Axial Load Factors : Y00.70
Da110.0 mm
Db104.0 mm
Da149.0 mm
Db160.0 mm
Ra(Max.)3.6 mm
Rb(Max.)3.2 mm
Mass(Refer.)3.83 kg

Technical documents & data sheet

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Record identity
KOYO 681/672
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