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
79.375
3.125
B
Inner-ring / bearing width
24.074
0.9478
T
Overall assembly width
25.4
1
C
Cup / outer-ring width
17.462
0.6875
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)
79.375
Outside dia. D (in)
3.1250
Width B (mm)
24.074
Overall width T (mm)
25.400
Overall width T (in)
1.0000
Cup width C (mm)
17.462
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
20700
Basic static load rating Cor (lbs)
17100
Basic dynamic load rating Cr (N)
92000
Basic static load rating C0r (N)
76200
Dynamic rating C1 (N, ISO)
92000
Dynamic rating C1 (lbf, ISO)
20700
Radial rating C90 (N)
23900
Radial rating C90 (lbf)
5360
Thrust rating Ca90 (N)
27300
Thrust rating Ca90 (lbf)
6130
Static rating C0 (N)
76200
Static rating C0 (lbf)
17100
Factor e
0.67
Factor Y
0.90
Factor K
0.87
Geometry factor G1
16.8
Geometry factor G2
7.6
Geometry factor Cg
0.0774
Effective load centre a (mm)
-2.0
Weight
Weight (kg)
0.59
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
1.5
Housing fillet r max (mm)
1.5
Shaft shoulder da (mm)
41.5
Shaft shoulder db (mm)
44.0
Housing shoulder Da (mm)
74.0
Housing shoulder Db (mm)
67.0
Cage projection Aa (mm)
3.4
Cage projection Ab (mm)
2.4
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
23,000
102
3,386
6
15,333
392
13,083
8
11,500
1,024
34,133
10
9,200
2,154
71,814
15
6,133
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 92,000 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.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.
