Original catalogue drawing - Timken TRB Catalog, page 358
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
263.525
10.375
D
Outside diameter
325.438
12.8125
B
Inner-ring / bearing width
28.575
1.125
T
Overall assembly width
28.575
1.125
C
Cup / outer-ring width
25.4
1
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)
263.525
Bore d (in)
10.3750
Outside dia. D (mm)
325.438
Outside dia. D (in)
12.8125
Width B (mm)
28.575
Overall width T (mm)
28.575
Overall width T (in)
1.1250
Cup width C (mm)
25.400
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
49800
Basic static load rating Cor (lbs)
125000
Basic dynamic load rating Cr (N)
221000
Basic static load rating C0r (N)
554000
Dynamic rating C1 (N, ISO)
221000
Dynamic rating C1 (lbf, ISO)
49800
Radial rating C90 (N)
57400
Radial rating C90 (lbf)
12900
Thrust rating Ca90 (N)
35900
Thrust rating Ca90 (lbf)
8080
Static rating C0 (N)
554000
Static rating C0 (lbf)
125000
Factor e
0.37
Factor Y
1.64
Factor K
1.60
Geometry factor G1
1028.2
Geometry factor G2
496.4
Geometry factor Cg
0.1676
Effective load centre a (mm)
20.3
Weight
Weight (kg)
5.19
Cone weight (kg)
3.33
Cup weight (kg)
1.88
Total weight (kg)
5.21
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
1.5
Housing fillet r max (mm)
1.5
Shaft shoulder da (mm)
275.0
Shaft shoulder db (mm)
275.0
Housing shoulder Da (mm)
315.0
Housing shoulder Db (mm)
312.0
Cage projection Aa (mm)
1.3
Cage projection Ab (mm)
1.3
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
55,250
102
3,386
6
36,833
392
13,083
8
27,625
1,024
34,133
10
22,100
2,154
71,814
15
14,733
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 221,000 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.358 (dimensions) / p.87 (cone) / p.87 (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.
