99,016 bearing records · search, filter and compare

KOYO / Four-row cylindrical roller bearings

KOYO 312943/1YD

Rolling mill roll neck bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available
Bore diameterd
240 mm
Outside diameterD
330 mm
WidthB
220 mm
Dynamic load ratingC
1900 kN
Static load ratingC0
4250 kN
Mass≈m
55.5 kg

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 specifications8 parameters
Core specifications
ParameterSymbolValue
Variant / constructionFour-row cylindrical roller bearings
Bore diameterd240 mm
Outside diameterD330 mm
WidthB220 mm
Basic dynamic load ratingC1900 kN
Basic static load ratingC04250 kN
Fatigue load limitPu471 kN
Mass≈m55.5 kg
Manufacturer Identity2 parameters
Manufacturer Identity
ParameterSymbolValue
BrandKOYO
Official Class Key140-010-000
Classification2 parameters
Classification
ParameterSymbolValue
Official Category PathRolling mill roll neck bearings - Four-row cylindrical roller bearings
Official Classification 1Rolling mill roll neck bearings / Four-row cylindrical roller bearings
Technical Data15 parameters
Technical Data
ParameterSymbolValue
d240 mm
D330 mm
B220 mm
C220 mm
Fw270 mm
R(Min.)3 mm
R1(Min.)3 mm
Basic Load Ratings : Cr1900 kN
Basic Load Ratings : C0R4250 kN
Fatigue Load Limit : Cu471 kN
Da(Min.)310 mm
Da(Max.)316 mm
Ra(Max.)2.5 mm
Rb(Max.)2.5 mm
Mass(Refer.)55.5 kg

Technical documents & data sheet

This product page is a BearingScope catalogue reference, not a manufacturer-certified drawing. Preserve the full brand and designation when comparing files.

Record identity
KOYO 312943/1YD
Document matching
Exact designation, assembly scope, revision and units must agree.

No verified redistributable CAD or manufacturer PDF is registered for this exact model. A catalogue image is not a dimensioned drawing. Missing technical files are not generated or replaced with unrelated models.

Look up another model or check drawing requirements →

Search the consolidated catalogue

Find, filter and compare bearing model data in one place.

Open model search