Original catalogue drawing - Timken TRB Catalog, page 354
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
249.25
9.813
D
Outside diameter
381
15
B
Inner-ring / bearing width
76.2
3
T
Overall assembly width
79.375
3.125
C
Cup / outer-ring width
57.15
2.25
r
Chamfer (min)
4.8
0.189
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)
249.250
Bore d (in)
9.8130
Outside dia. D (mm)
381.000
Outside dia. D (in)
15.0000
Width B (mm)
76.200
Overall width T (mm)
79.375
Overall width T (in)
3.1250
Cup width C (mm)
57.150
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
204000
Basic static load rating Cor (lbs)
381000
Basic dynamic load rating Cr (N)
907000
Basic static load rating C0r (N)
1690000
Dynamic rating C1 (N, ISO)
907000
Dynamic rating C1 (lbf, ISO)
204000
Radial rating C90 (N)
235000
Radial rating C90 (lbf)
52900
Thrust rating Ca90 (N)
208000
Thrust rating Ca90 (lbf)
46800
Static rating C0 (N)
1690000
Static rating C0 (lbf)
381000
Factor e
0.52
Factor Y
1.16
Factor K
1.13
Geometry factor G1
1321.8
Geometry factor G2
168.9
Geometry factor Cg
0.1640
Effective load centre a (mm)
9.7
Weight
Weight (kg)
29.23
Cone weight (kg)
18.36
Cup weight (kg)
10.77
Total weight (kg)
29.13
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
6.4
Housing fillet r max (mm)
4.8
Shaft shoulder da (mm)
269.0
Shaft shoulder db (mm)
279.0
Housing shoulder Da (mm)
358.0
Housing shoulder Db (mm)
343.0
Cage projection Aa (mm)
13.0
Cage projection Ab (mm)
2.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
226,750
102
3,386
6
151,167
392
13,083
8
113,375
1,024
34,133
10
90,700
2,154
71,814
15
60,467
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 907,000 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.354 (dimensions) / p.124 (cone) / p.123 (cup)
Series type
TS
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.
