Original catalogue drawing - Timken TRB Catalog, page 664
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
304.8
12
D
Outside diameter
419.1
16.5
T
Overall assembly width
161.925
6.375
C
Cup / outer-ring width
129.54
5.1
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)
304.800
Bore d (in)
12.0000
Outside dia. D (mm)
419.100
Outside dia. D (in)
16.5000
Overall width T (mm)
161.925
Overall width T (in)
6.3750
Cup width C (mm)
129.540
Cup width C (in)
5.1000
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
464000
Basic dynamic load rating Cr (N)
2060000
Dynamic rating C1 (N, ISO)
2060000
Dynamic rating C1 (lbf, ISO)
464000
Radial rating C90 (N)
307000
Radial rating C90 (lbf)
69100
Thrust rating Ca90 (N)
273000
Thrust rating Ca90 (lbf)
61400
Factor e
0.52
Factor Y1
1.30
Factor Y2
1.94
Factor K
1.13
Weight
Weight (kg)
63.76
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
6.4
Housing fillet r max (mm)
1.5
Shaft shoulder db (mm)
336.0
Housing shoulder Da (mm)
406.9
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
515,000
102
3,386
6
343,333
392
13,083
8
257,500
1,024
34,133
10
206,000
2,154
71,814
15
137,333
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 2,060,000 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.664 (dimensions)
Series type
TNASW
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.
