478/472DTimkenTapered Roller

Name: Timken 478/472D Tapered Roller Bearing
Brand: Timken
SKU: 478/472D

478/472D is a Timken tapered roller bearing, bore 65 mm, O.D. 120 mm, height 65.09 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly

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Bore d65mm

Outside dia. D120mm

Overall width T65.09mm

Dynamic Cr250kN

Weight3.17kg

Mean dia. dm92.5mm

Original catalogue drawing - Timken TRB Catalog, page 536

478/472D Timken Tapered Roller bearing catalogue drawing

Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.

Scale cross-section

Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.

Dimension table (mm / inch)

Symbol	Dimension	mm	inch
d	Bore diameter	65	2.5591
D	Outside diameter	120	4.7244
T	Overall assembly width	65.09	2.5626
C	Cup / outer-ring width	53.975	2.125
r	Chamfer (min)	0.8	0.0315

Notes

Tapered roller bearings are cone / cup assemblies; cone and cup weights are listed separately and the total is their sum. Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.

Main dimensions

Bore d (mm)	65.000
Bore d (in)	2.5591
Outside dia. D (mm)	120.000
Outside dia. D (in)	4.7244
Overall width T (mm)	65.090
Overall width T (in)	2.5626
Cup width C (mm)	53.975
Cup width C (in)	2.1250

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	56100
Basic dynamic load rating Cr (N)	250000
Dynamic rating C1 (N, ISO)	250000
Dynamic rating C1 (lbf, ISO)	56100
Radial rating C90 (N)	37200
Radial rating C90 (lbf)	8360
Thrust rating Ca90 (N)	24500
Thrust rating Ca90 (lbf)	5500
Factor e	0.38
Factor Y1	1.75
Factor Y2	2.61
Factor K	1.52
Geometry factor G1	77.2
Geometry factor G2	23.0
Geometry factor Cg	0.1083

Weight

Weight (kg)	3.17

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)	2.3
Housing fillet r max (mm)	0.8
Shaft shoulder db (mm)	77.0
Housing shoulder Da (mm)	114.0

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	62,500	102	3,386
6	41,667	392	13,083
8	31,250	1,024	34,133
10	25,000	2,154	71,814
15	16,667	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 250,000 N. Hours = L₁₀ x 10⁶ / (60n). Life-modification factors for lubrication, contamination and temperature (a_ISO) are not included.

Source & traceability

Brand	Timken
Source catalogue	Timken Tapered Roller Bearing Catalog (2016)
Catalogue page	p.536 (dimensions)
Series type	TDO

ISO dynamic rating C1, Timken C90 / Ca90, static rating C0, geometry factors and assembly weight.

Series variants (different suffix)

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
478-S/472	Timken	Tapered Roller	66.67	120	29.01	-	1.4
478/472	Timken	Tapered Roller	65	120	29.01	143 kN	1.43
478/472A	Timken	Tapered Roller	65	120	29.01	143 kN	1.4
478/472X	Timken	Tapered Roller	65	123.83	29.01	143 kN	1.57
478/473	Timken	Tapered Roller	65	120	29.01	143 kN	1.48

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
30213	Timken	Tapered Roller	65	120	23	138 kN	1.14
30313	Timken	Tapered Roller	65	140	33	222 kN	2.47
31313	Timken	Tapered Roller	65	140	33	196 kN	2.39
32013X	Timken	Tapered Roller	65	100	23	98 kN	0.64
32213	Timken	Tapered Roller	65	120	31	174 kN	1.51
32313	Timken	Tapered Roller	65	140	48	320 kN	3.62
33013	Timken	Tapered Roller	65	100	27	107 kN	0.74
33113	Timken	Tapered Roller	65	110	34	167 kN	1.27

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