Original catalogue drawing - Timken TRB Catalog, page 336
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
187.325
7.375
D
Outside diameter
320.675
12.625
B
Inner-ring / bearing width
85.725
3.375
T
Overall assembly width
88.9
3.5
C
Cup / outer-ring width
65.088
2.5625
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)
187.325
Bore d (in)
7.3750
Outside dia. D (mm)
320.675
Outside dia. D (in)
12.6250
Width B (mm)
85.725
Overall width T (mm)
88.900
Overall width T (in)
3.5000
Cup width C (mm)
65.088
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
236000
Basic static load rating Cor (lbs)
356000
Basic dynamic load rating Cr (N)
1050000
Basic static load rating C0r (N)
1580000
Dynamic rating C1 (N, ISO)
1050000
Dynamic rating C1 (lbf, ISO)
236000
Radial rating C90 (N)
272000
Radial rating C90 (lbf)
61100
Thrust rating Ca90 (N)
148000
Thrust rating Ca90 (lbf)
33400
Static rating C0 (N)
1580000
Static rating C0 (lbf)
356000
Factor e
0.32
Factor Y
1.88
Factor K
1.83
Geometry factor G1
905.7
Geometry factor G2
90.3
Geometry factor Cg
0.1242
Effective load centre a (mm)
-22.4
Weight
Weight (kg)
26.02
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
5.5
Housing fillet r max (mm)
4.8
Shaft shoulder da (mm)
205.0
Shaft shoulder db (mm)
214.0
Housing shoulder Da (mm)
301.0
Housing shoulder Db (mm)
293.0
Cage projection Aa (mm)
11.5
Cage projection Ab (mm)
2.8
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
262,500
102
3,386
6
175,000
392
13,083
8
131,250
1,024
34,133
10
105,000
2,154
71,814
15
70,000
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 1,050,000 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.336 (dimensions)
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.
