TIMKEN NP787871-90KA1

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

Technical data available

Bore diameterd: 300 mm
Outside diameterD: 440 mm
WidthB: 105 mm
Dynamic load ratingC: 1160 kN
Static load ratingC0: 2300 kN
Mass≈m: 59.8 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		LM957500
Variant / construction		TDI - Tapered Double Inner
Bore diameter	d	300 mm
Outside diameter	D	440 mm
Width	B	105 mm
Basic dynamic load rating	C	1160 kN
Basic static load rating	C0	2300 kN
Mass	≈m	59.8 kg
Precision class		ABMA Class K
Sealing		Open
Cage		Steel cage

Calculation Factors6 parameters

Calculation Factors
Parameter	Symbol	Value
K Factor		0.67
Y1 Factor		0.77
Y2 Factor		1.15
Y0 Factor		0.75
E Factor		0.88
Cg Factor		0.1797

Manufacturer Identity9 parameters

Manufacturer Identity
Parameter	Symbol	Value
Brand		Timken
Material Number		000000000190086935
World Assembly Part Number		NP787871_NP999230
Inner Ring Part Number		NP787871
Outer Ring Part Number		NP999230
Drawing Number		E-60984
Upc		0085706185589
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		TDI - Tapered Double Inner
Construction		Double Row Tapered Roller Bearing Assembly \| Imperial Series \| 11.8110 in Bore \| 17.3228 in OD \| 4.1339 in Width \| Open \| Cylindrical Bore \| Steel Cage \| Precision ABMA Class K
Number Of Rows		2
Tapered Bore		N

Technical Data10 parameters

Technical Data
Parameter	Symbol	Value
Overall Width		0.000 mm
Radial Rating		300,000 N
Axial Rating		258,000 N
Dynamic Rating C1		1,160,000 N
Dynamic Rating C90		300,000 N
Dynamic Axial Rating Ca90		258,000 N
Dynamic Axial Rating Ca1		995,000 N
Static Radial Rating C0		2,300,000 N
Extended Dynamic Rating Ce		0 N
Static Axial Rating C0A		2,930,000 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 NP787871-90KA1
Document matching: Exact designation, assembly scope, revision and units must agree.

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