Original catalogue drawing - Timken TRB Catalog, page 644
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
316.111
12.4453
D
Outside diameter
447.675
17.625
B
Inner-ring / bearing width
173.035
6.8124
T
Overall assembly width
157.429
6.198
r
Chamfer (min)
3.3
0.1299
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)
316.111
Bore d (in)
12.4453
Outside dia. D (mm)
447.675
Outside dia. D (in)
17.6250
Width B (mm)
173.035
Width B (in)
6.8124
Overall width T (mm)
157.429
Overall width T (in)
6.1980
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
656000
Basic dynamic load rating Cr (N)
2920000
Dynamic rating C1 (N, ISO)
2920000
Dynamic rating C1 (lbf, ISO)
656000
Radial rating C90 (N)
435000
Radial rating C90 (lbf)
97800
Thrust rating Ca90 (N)
249000
Thrust rating Ca90 (lbf)
56000
Factor e
0.33
Factor Y1
2.02
Factor Y2
3.00
Factor K
1.74
Geometry factor G1
2944.6
Geometry factor G2
303.9
Geometry factor Cg
0.1863
Weight
Weight (kg)
89.79
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
3.0
Housing fillet r max (mm)
3.3
Housing shoulder Db (mm)
418.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
730,000
102
3,386
6
486,667
392
13,083
8
365,000
1,024
34,133
10
292,000
2,154
71,814
15
194,667
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 2,920,000 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.644 (dimensions)
Series type
TDIT
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.
