Original catalogue drawing - Timken TRB Catalog, page 304
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
101.6
4
D
Outside diameter
250.825
9.875
B
Inner-ring / bearing width
73.025
2.875
T
Overall assembly width
76.2
3
C
Cup / outer-ring width
50.8
2
r
Chamfer (min)
3.3
0.1299
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)
101.600
Bore d (in)
4.0000
Outside dia. D (mm)
250.825
Outside dia. D (in)
9.8750
Width B (mm)
73.025
Overall width T (mm)
76.200
Overall width T (in)
3.0000
Cup width C (mm)
50.800
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
186000
Basic static load rating Cor (lbs)
186000
Basic dynamic load rating Cr (N)
828000
Basic static load rating C0r (N)
827000
Dynamic rating C1 (N, ISO)
828000
Dynamic rating C1 (lbf, ISO)
186000
Radial rating C90 (N)
215000
Radial rating C90 (lbf)
48200
Thrust rating Ca90 (N)
257000
Thrust rating Ca90 (lbf)
57800
Static rating C0 (N)
827000
Static rating C0 (lbf)
186000
Factor e
0.70
Factor Y
0.86
Factor K
0.84
Geometry factor G1
282.1
Geometry factor G2
35.2
Geometry factor Cg
0.1370
Effective load centre a (mm)
-3.3
Weight
Weight (kg)
17.11
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
6.4
Housing fillet r max (mm)
3.3
Shaft shoulder da (mm)
130.8
Shaft shoulder db (mm)
149.0
Housing shoulder Da (mm)
228.8
Housing shoulder Db (mm)
210.0
Cage projection Aa (mm)
15.1
Cage projection Ab (mm)
4.6
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
207,000
102
3,386
6
138,000
392
13,083
8
103,500
1,024
34,133
10
82,800
2,154
71,814
15
55,200
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 828,000 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.304 (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.
