Original catalogue drawing - Timken TRB Catalog, page 652
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
63.5
2.5
D
Outside diameter
139.7
5.5
T
Overall assembly width
77.788
3.0625
C
Cup / outer-ring width
51.803
2.0395
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)
63.500
Bore d (in)
2.5000
Outside dia. D (mm)
139.700
Outside dia. D (in)
5.5000
Overall width T (mm)
77.788
Overall width T (in)
3.0625
Cup width C (mm)
51.803
Cup width C (in)
2.0395
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
79300
Basic dynamic load rating Cr (N)
353000
Dynamic rating C1 (N, ISO)
353000
Dynamic rating C1 (lbf, ISO)
79300
Radial rating C90 (N)
52600
Radial rating C90 (lbf)
11800
Thrust rating Ca90 (N)
77900
Thrust rating Ca90 (lbf)
17500
Factor e
0.87
Factor Y1
0.78
Factor Y2
1.16
Factor K
0.67
Weight
Weight (kg)
5.11
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
2.3
Housing fillet r max (mm)
1.5
Shaft shoulder db (mm)
85.0
Housing shoulder Da (mm)
131.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
88,250
102
3,386
6
58,833
392
13,083
8
44,125
1,024
34,133
10
35,300
2,154
71,814
15
23,533
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 353,000 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.652 (dimensions)
Series type
TNA
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.
