TIMKEN M270730-902A1

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

Technical data available

Bore diameterd: 409.575 mm
Outside diameterD: 635 mm
WidthB: 257.175 mm
Dynamic load ratingC: 5700 kN
Static load ratingC0: 12900 kN
Mass≈m: 299.15 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		M270700
Variant / construction		TDO - Tapered Double Outer
Bore diameter	d	409.575 mm
Outside diameter	D	635 mm
Width	B	257.175 mm
Basic dynamic load rating	C	5700 kN
Basic static load rating	C0	12900 kN
Mass	≈m	299.15 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		0.2458

Manufacturer Identity9 parameters

Manufacturer Identity
Parameter	Symbol	Value
Brand		Timken
Material Number		000000000100178033
World Assembly Part Number		M270730_M270710CD
Inner Ring Part Number		M270730
Outer Ring Part Number		M270710CD
Drawing Number		E-34874
Upc		0053893175966
Official Source System		CORE BP - DS DF
Official Last Run		2026-08-23T20:02:48.5

Product Identity4 parameters

Product Identity
Parameter	Symbol	Value
Type Description		TDO - Tapered Double Outer
Construction		Double Row Tapered Roller Bearing Assembly \| Imperial Series \| 16.1250 in Bore \| 25.0000 in OD \| 10.1250 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		1,480,000 N
Axial Rating		484,000 N
Dynamic Rating C1		5,700,000 N
Dynamic Rating C90		1,480,000 N
Dynamic Axial Rating Ca90		484,000 N
Dynamic Axial Rating Ca1		1,870,000 N
Static Radial Rating C0		12,900,000 N
Extended Dynamic Rating Ce		0 N
Static Axial Rating C0A		6,230,000 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 M270730-902A1
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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