Original catalogue drawing - Timken TRB Catalog, page 570
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
203.2
8
D
Outside diameter
292.1
11.5
T
Overall assembly width
109.538
4.3125
C
Cup / outer-ring width
84.138
3.3125
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)
203.200
Bore d (in)
8.0000
Outside dia. D (mm)
292.100
Outside dia. D (in)
11.5000
Overall width T (mm)
109.538
Overall width T (in)
4.3125
Cup width C (mm)
84.138
Cup width C (in)
3.3125
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
263000
Basic dynamic load rating Cr (N)
1170000
Dynamic rating C1 (N, ISO)
1170000
Dynamic rating C1 (lbf, ISO)
263000
Radial rating C90 (N)
174000
Radial rating C90 (lbf)
39100
Thrust rating Ca90 (N)
119000
Thrust rating Ca90 (lbf)
26800
Factor e
0.40
Factor Y1
1.69
Factor Y2
2.51
Factor K
1.46
Geometry factor G1
751.6
Geometry factor G2
147.3
Geometry factor Cg
0.1253
Weight
Weight (kg)
21.67
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
3.5
Housing fillet r max (mm)
0.8
Shaft shoulder db (mm)
221.0
Housing shoulder Da (mm)
281.0
Pin dimension Ka (mm)
19.05
Pin dimension Kb (mm)
7.95
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
292,500
102
3,386
6
195,000
392
13,083
8
146,250
1,024
34,133
10
117,000
2,154
71,814
15
78,000
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 1,170,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.
Source & traceability
Brand
Timken
Source catalogue
Timken Tapered Roller Bearing Catalog (2016)
Catalogue page
p.570 (dimensions)
Series type
TDO
ISO dynamic rating C1, Timken C90 / Ca90, static rating C0, geometry factors and assembly weight.
Send us the quantity you need and we will come back with price and
lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.
