Original catalogue drawing - Timken TRB Catalog, page 638
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
647.7
25.5
D
Outside diameter
1028.7
40.5
B
Inner-ring / bearing width
273.05
10.75
T
Overall assembly width
279.4
11
r
Chamfer (min)
6.4
0.252
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)
647.700
Bore d (in)
25.5000
Outside dia. D (mm)
1028.700
Outside dia. D (in)
40.5000
Width B (mm)
273.050
Width B (in)
10.7500
Overall width T (mm)
279.400
Overall width T (in)
11.0000
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
2190000
Basic dynamic load rating Cr (N)
9760000
Dynamic rating C1 (N, ISO)
9760000
Dynamic rating C1 (lbf, ISO)
2190000
Radial rating C90 (N)
1450000
Radial rating C90 (lbf)
327000
Thrust rating Ca90 (N)
782000
Thrust rating Ca90 (lbf)
176000
Factor e
0.3
Factor Y1
2.2
Factor Y2
3.2
Factor K
1.86
Geometry factor G1
12039.2
Geometry factor G2
632.2
Geometry factor Cg
0.2880
Weight
Weight (kg)
863.66
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
11.0
Housing fillet r max (mm)
6.4
Shaft shoulder da (mm)
713.5
Housing shoulder Db (mm)
960.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
2,440,000
102
3,386
6
1,626,667
392
13,083
8
1,220,000
1,024
34,133
10
976,000
2,154
71,814
15
650,667
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 9,760,000 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.638 (dimensions)
Series type
TDI
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.
