779/773DTimkenTapered Roller

Name: Timken 779/773D Tapered Roller Bearing
Brand: Timken
SKU: 779/773D

779/773D is a Timken tapered roller bearing, bore 98.42 mm, O.D. 180 mm, height 104.78 mm. Dimensions, drawing, interchanges and price.

Cone + cup assembly

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Bore d98.42mm

Outside dia. D180mm

Overall width T104.78mm

Dynamic Cr603kN

Weight10.97kg

Mean dia. dm139.2mm

Original catalogue drawing - Timken TRB Catalog, page 552

779/773D 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	98.425	3.875
D	Outside diameter	180	7.0866
T	Overall assembly width	104.775	4.125
C	Cup / outer-ring width	85.725	3.375
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)	98.425
Bore d (in)	3.8750
Outside dia. D (mm)	180.000
Outside dia. D (in)	7.0866
Overall width T (mm)	104.775
Overall width T (in)	4.1250
Cup width C (mm)	85.725
Cup width C (in)	3.3750

Load ratings & speeds

Basic dynamic load rating Cr (lbs)	135000
Basic dynamic load rating Cr (N)	603000
Dynamic rating C1 (N, ISO)	603000
Dynamic rating C1 (lbf, ISO)	135000
Radial rating C90 (N)	89700
Radial rating C90 (lbf)	20200
Thrust rating Ca90 (N)	59200
Thrust rating Ca90 (lbf)	13300
Factor e	0.39
Factor Y1	1.75
Factor Y2	2.61
Factor K	1.51
Geometry factor G1	227.3
Geometry factor G2	41.3
Geometry factor Cg	0.1067

Weight

Weight (kg)	10.97

Mounting dimensions (fillets / shoulders)

Shaft fillet R max (mm)	3.5
Housing fillet r max (mm)	0.8
Shaft shoulder db (mm)	116.0
Housing shoulder Da (mm)	168.0

Bearing life (ISO 281 basic rating life)

C / P	Equivalent load P (N)	L₁₀ (10⁶ rev)	L_10h at 500 rpm
4	150,750	102	3,386
6	100,500	392	13,083
8	75,375	1,024	34,133
10	60,300	2,154	71,814
15	40,200	8,323	277,449

Basic rating life per ISO 281: L₁₀ = (C/P)^10/3 with C = 603,000 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.552 (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
779/772	Timken	Tapered Roller	98.42	180.97	48.01	346 kN	5.21
779/774D	Timken	Tapered Roller	98.42	180.97	104.78	603 kN	10.98

Nearby bore sizes

Designation	Brand	Type	d	D	B/T	Dyn. rating	kg
52387/52618	Timken	Tapered Roller	98.42	157.16	36.12	223 kN	2.53
52387/52637D	Timken	Tapered Roller	98.42	161.93	82.55	389 kN	6.16
685/672	Timken	Tapered Roller	98.42	168.28	41.27	265 kN	3.55
779D/772	Timken	Tapered Roller	98.42	180.97	102.36	603 kN	11.33
866/852	Timken	Tapered Roller	98.42	190.5	57.53	-	7.22
866/854D	Timken	Tapered Roller	98.42	190.5	127	797 kN	15.41
943/930	Timken	Tapered Roller	98.42	206.38	66.67	-	10.39
943/932CD	Timken	Tapered Roller	98.42	212.72	142.88	996 kN	23.16

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