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
368.3
14.5
D
Outside diameter
523.875
20.625
B
Inner-ring / bearing width
185.738
7.3125
T
Overall assembly width
185.738
7.3125
r
Chamfer (min)
6.4
0.252
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)
368.300
Bore d (in)
14.5000
Outside dia. D (mm)
523.875
Outside dia. D (in)
20.6250
Width B (mm)
185.738
Width B (in)
7.3125
Overall width T (mm)
185.738
Overall width T (in)
7.3125
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
890000
Basic dynamic load rating Cr (N)
3960000
Dynamic rating C1 (N, ISO)
3960000
Dynamic rating C1 (lbf, ISO)
890000
Radial rating C90 (N)
589000
Radial rating C90 (lbf)
132000
Thrust rating Ca90 (N)
335000
Thrust rating Ca90 (lbf)
75400
Factor e
0.33
Factor Y1
2.03
Factor Y2
3.02
Factor K
1.76
Geometry factor G1
4297.3
Geometry factor G2
412.9
Geometry factor Cg
0.2106
Weight
Weight (kg)
141.4
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
3.3
Housing fillet r max (mm)
6.4
Housing shoulder Db (mm)
487.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
990,000
102
3,386
6
660,000
392
13,083
8
495,000
1,024
34,133
10
396,000
2,154
71,814
15
264,000
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 3,960,000 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.
