Original catalogue drawing - Timken TRB Catalog, page 656
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
177.8
7
D
Outside diameter
282.575
11.125
T
Overall assembly width
107.95
4.25
C
Cup / outer-ring width
79.375
3.125
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)
177.800
Bore d (in)
7.0000
Outside dia. D (mm)
282.575
Outside dia. D (in)
11.1250
Overall width T (mm)
107.950
Overall width T (in)
4.2500
Cup width C (mm)
79.375
Cup width C (in)
3.1250
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
168000
Basic dynamic load rating Cr (N)
748000
Dynamic rating C1 (N, ISO)
748000
Dynamic rating C1 (lbf, ISO)
168000
Radial rating C90 (N)
132000
Radial rating C90 (lbf)
29700
Thrust rating Ca90 (N)
93900
Thrust rating Ca90 (lbf)
21100
Factor e
0.42
Factor Y1
1.62
Factor Y2
2.42
Factor K
1.41
Weight
Weight (kg)
23.05
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
3.5
Housing fillet r max (mm)
1.5
Shaft shoulder db (mm)
200.0
Housing shoulder Da (mm)
267.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
187,000
102
3,386
6
124,667
392
13,083
8
93,500
1,024
34,133
10
74,800
2,154
71,814
15
49,867
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 748,000 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.656 (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.
