Original catalogue drawing - Timken TRB Catalog, page 120
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
3.1496
B
Inner-ring / bearing width
22.403
0.882
T
Overall assembly width
24.175
0.9518
C
Cup / outer-ring width
21
0.8268
r
Chamfer (min)
2.3
0.0906
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)
80.000
Outside dia. D (in)
3.1496
Width B (mm)
22.403
Overall width T (mm)
24.175
Overall width T (in)
0.9518
Cup width C (mm)
21.000
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
21200
Basic static load rating Cor (lbs)
18700
Basic dynamic load rating Cr (N)
94300
Basic static load rating C0r (N)
83400
Dynamic rating C1 (N, ISO)
94300
Dynamic rating C1 (lbf, ISO)
21200
Radial rating C90 (N)
24400
Radial rating C90 (lbf)
5490
Thrust rating Ca90 (N)
11400
Thrust rating Ca90 (lbf)
2570
Static rating C0 (N)
83400
Static rating C0 (lbf)
18700
Factor e
0.27
Factor Y
2.20
Factor K
2.14
Geometry factor G1
26.5
Geometry factor G2
13.0
Geometry factor Cg
0.0676
Effective load centre a (mm)
-6.4
Weight
Weight (kg)
0.59
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
0.8
Housing fillet r max (mm)
2.3
Shaft shoulder da (mm)
39.5
Shaft shoulder db (mm)
40.0
Housing shoulder Da (mm)
75.0
Housing shoulder Db (mm)
71.0
Cage projection Aa (mm)
0.7
Cage projection Ab (mm)
1.1
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
23,575
102
3,386
6
15,717
392
13,083
8
11,788
1,024
34,133
10
9,430
2,154
71,814
15
6,287
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 94,300 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.120 (dimensions)
Series type
TS
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.
