Original catalogue drawing - Timken TRB Catalog, page 516
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
31.75
1.25
D
Outside diameter
80.962
3.1875
T
Overall assembly width
55.562
2.1875
C
Cup / outer-ring width
39.688
1.5625
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)
31.750
Bore d (in)
1.2500
Outside dia. D (mm)
80.962
Outside dia. D (in)
3.1875
Overall width T (mm)
55.562
Overall width T (in)
2.1875
Cup width C (mm)
39.688
Cup width C (in)
1.5625
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
36000
Basic dynamic load rating Cr (N)
160000
Dynamic rating C1 (N, ISO)
160000
Dynamic rating C1 (lbf, ISO)
36000
Radial rating C90 (N)
23900
Radial rating C90 (lbf)
5360
Thrust rating Ca90 (N)
27300
Thrust rating Ca90 (lbf)
6130
Factor e
0.67
Factor Y1
1.01
Factor Y2
1.50
Factor K
0.87
Geometry factor G1
16.8
Geometry factor G2
7.6
Geometry factor Cg
0.0774
Weight
Weight (kg)
1.31
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
1.5
Housing fillet r max (mm)
1.5
Shaft shoulder db (mm)
44.0
Housing shoulder Da (mm)
74.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
40,000
102
3,386
6
26,667
392
13,083
8
20,000
1,024
34,133
10
16,000
2,154
71,814
15
10,667
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 160,000 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.516 (dimensions)
Series type
TDO
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.
