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
254
10
D
Outside diameter
323.85
12.75
B
Inner-ring / bearing width
22.225
0.875
T
Overall assembly width
22.225
0.875
C
Cup / outer-ring width
15.875
0.625
r
Chamfer (min)
1.5
0.0591
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)
254.000
Bore d (in)
10.0000
Outside dia. D (mm)
323.850
Outside dia. D (in)
12.7500
Width B (mm)
22.225
Overall width T (mm)
22.225
Overall width T (in)
0.8750
Cup width C (mm)
15.875
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
33900
Basic static load rating Cor (lbs)
87800
Basic dynamic load rating Cr (N)
151000
Basic static load rating C0r (N)
391000
Dynamic rating C1 (N, ISO)
151000
Dynamic rating C1 (lbf, ISO)
33900
Radial rating C90 (N)
39200
Radial rating C90 (lbf)
8800
Thrust rating Ca90 (N)
23200
Thrust rating Ca90 (lbf)
5220
Static rating C0 (N)
391000
Static rating C0 (lbf)
87800
Factor e
0.35
Factor Y
1.73
Factor K
1.69
Geometry factor G1
906.8
Geometry factor G2
658.2
Geometry factor Cg
0.1567
Effective load centre a (mm)
21.1
Weight
Weight (kg)
4.27
Cone weight (kg)
3.09
Cup weight (kg)
1.23
Total weight (kg)
4.32
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
1.5
Housing fillet r max (mm)
1.5
Shaft shoulder da (mm)
266.0
Shaft shoulder db (mm)
267.0
Housing shoulder Da (mm)
312.0
Housing shoulder Db (mm)
310.0
Cage projection Aa (mm)
1.7
Cage projection Ab (mm)
1.9
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
37,750
102
3,386
6
25,167
392
13,083
8
18,875
1,024
34,133
10
15,100
2,154
71,814
15
10,067
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 151,000 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.84 (cone) / p.84 (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.
