Original catalogue drawing - Timken TRB Catalog, page 512
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
25.4
1
D
Outside diameter
50.005
1.9687
T
Overall assembly width
33.34
1.3126
C
Cup / outer-ring width
25.4
1
r
Chamfer (min)
0.6
0.0236
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)
25.400
Bore d (in)
1.0000
Outside dia. D (mm)
50.005
Outside dia. D (in)
1.9687
Overall width T (mm)
33.340
Overall width T (in)
1.3126
Cup width C (mm)
25.400
Cup width C (in)
1.0000
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
11400
Basic dynamic load rating Cr (N)
50700
Dynamic rating C1 (N, ISO)
50700
Dynamic rating C1 (lbf, ISO)
11400
Radial rating C90 (N)
7550
Radial rating C90 (lbf)
1700
Thrust rating Ca90 (N)
5190
Thrust rating Ca90 (lbf)
1170
Factor e
0.40
Factor Y1
1.68
Factor Y2
2.50
Factor K
1.45
Geometry factor G1
7.6
Geometry factor G2
7.1
Geometry factor Cg
0.0509
Weight
Weight (kg)
0.27
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
1.5
Housing fillet r max (mm)
0.6
Shaft shoulder db (mm)
31.5
Housing shoulder Da (mm)
46.5
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
12,675
102
3,386
6
8,450
392
13,083
8
6,338
1,024
34,133
10
5,070
2,154
71,814
15
3,380
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 50,700 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.512 (dimensions)
Series type
TDO
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.
