TIMKEN K-1240-A

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

Technical data available

Bore diameterd: 1130.3 mm
Outside diameterD: 1384.3 mm
WidthB: 254 mm
Dynamic load ratingC: 5120 kN
Static load ratingC0: 15500 kN
Mass≈m: 738.85 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		NTS-724496
Variant / construction		TDO - Tapered Double Outer
Bore diameter	d	1130.3 mm
Outside diameter	D	1384.3 mm
Width	B	254 mm
Basic dynamic load rating	C	5120 kN
Basic static load rating	C0	15500 kN
Mass	≈m	738.85 kg
Precision class		ABMA Class 4
Sealing		Open
Cage		Steel cage

Calculation Factors6 parameters

Calculation Factors
Parameter	Symbol	Value
K Factor		0.37
Y1 Factor		0.42
Y2 Factor		0.63
Y0 Factor		0.42
E Factor		1.59
Cg Factor		0.5533

Manufacturer Identity9 parameters

Manufacturer Identity
Parameter	Symbol	Value
Brand		Timken
Material Number		000000000190033389
World Assembly Part Number		NP425019_NP774911
Inner Ring Part Number		NP425019
Outer Ring Part Number		NP774911
Drawing Number		E-53252
Upc		0013992367006
Official Source System		CORE BP - DS DF
Official Last Run		2026-08-23T20:02:47.75

Product Identity4 parameters

Product Identity
Parameter	Symbol	Value
Type Description		TDO - Tapered Double Outer
Construction		Double Row Tapered Roller Bearing Assembly \| Imperial Series \| 44.5000 in Bore \| 54.5000 in OD \| 10.0000 in Width \| Open \| Cylindrical Bore \| Steel Cage \| Precision ABMA Class 4
Number Of Rows		2
Tapered Bore		N

Technical Data10 parameters

Technical Data
Parameter	Symbol	Value
Overall Width		0.000 mm
Radial Rating		1,330,000 N
Axial Rating		2,080,000 N
Dynamic Rating C1		5,120,000 N
Dynamic Rating C90		1,330,000 N
Dynamic Axial Rating Ca90		2,080,000 N
Dynamic Axial Rating Ca1		8,010,000 N
Static Radial Rating C0		15,500,000 N
Extended Dynamic Rating Ce		0 N
Static Axial Rating C0A		36,000,000 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 K-1240-A
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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