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
66.675
2.625
D
Outside diameter
127
5
T
Overall assembly width
80.962
3.1875
C
Cup / outer-ring width
65.088
2.5625
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)
66.675
Bore d (in)
2.6250
Outside dia. D (mm)
127.000
Outside dia. D (in)
5.0000
Overall width T (mm)
80.962
Overall width T (in)
3.1875
Cup width C (mm)
65.088
Cup width C (in)
2.5625
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
76900
Basic dynamic load rating Cr (N)
342000
Dynamic rating C1 (N, ISO)
342000
Dynamic rating C1 (lbf, ISO)
76900
Radial rating C90 (N)
50900
Radial rating C90 (lbf)
11400
Thrust rating Ca90 (N)
31700
Thrust rating Ca90 (lbf)
7130
Factor e
0.36
Factor Y1
1.86
Factor Y2
2.76
Factor K
1.61
Weight
Weight (kg)
4.36
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
3.5
Housing fillet r max (mm)
1.5
Shaft shoulder db (mm)
82.0
Housing shoulder Da (mm)
119.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
85,500
102
3,386
6
57,000
392
13,083
8
42,750
1,024
34,133
10
34,200
2,154
71,814
15
22,800
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 342,000 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.
