TIMKEN DX991555-902A3

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

Technical data available

Bore diameterd: 269.875 mm
Outside diameterD: 381 mm
WidthB: 158.75 mm
Dynamic load ratingC: 2460 kN
Static load ratingC0: 4050 kN
Mass≈m: 52.24 kg

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Technical data

Product specifications

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

Core specifications11 parameters

Core specifications
Parameter	Symbol	Value
Series		M252300
Variant / construction		TDO - Tapered Double Outer
Bore diameter	d	269.875 mm
Outside diameter	D	381 mm
Width	B	158.75 mm
Basic dynamic load rating	C	2460 kN
Basic static load rating	C0	4050 kN
Mass	≈m	52.24 kg
Precision class		ABMA Class 2
Sealing		Open
Cage		Steel cage

Calculation Factors6 parameters

Calculation Factors
Parameter	Symbol	Value
K Factor		1.76
Y1 Factor		2.03
Y2 Factor		3.02
Y0 Factor		1.98
E Factor		0.33
Cg Factor		0.1588

Manufacturer Identity9 parameters

Manufacturer Identity
Parameter	Symbol	Value
Brand		Timken
Material Number		000000000190007887
World Assembly Part Number		DX991555_DX894223
Inner Ring Part Number		DX991555
Outer Ring Part Number		DX894223
Drawing Number		C-72978
Upc		0053893444604
Official Source System		CORE BP - DS DF
Official Last Run		2026-08-23T20:02:48.493

Product Identity4 parameters

Product Identity
Parameter	Symbol	Value
Type Description		TDO - Tapered Double Outer
Construction		Double Row Tapered Roller Bearing Assembly \| Imperial Series \| 10.6250 in Bore \| 15.0000 in OD \| 6.2500 in Width \| Open \| Cylindrical Bore \| Steel Cage \| Precision ABMA Class 2
Number Of Rows		2
Tapered Bore		N

Technical Data10 parameters

Technical Data
Parameter	Symbol	Value
Overall Width		0.000 mm
Radial Rating		638,000 N
Axial Rating		209,000 N
Dynamic Rating C1		2,460,000 N
Dynamic Rating C90		638,000 N
Dynamic Axial Rating Ca90		209,000 N
Dynamic Axial Rating Ca1		805,000 N
Static Radial Rating C0		4,050,000 N
Extended Dynamic Rating Ce		0 N
Static Axial Rating C0A		1,960,000 N

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: TIMKEN DX991555-902A3
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.

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