Original catalogue drawing - Timken TRB Catalog, page 116
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
66.421
2.615
B
Inner-ring / bearing width
25.357
0.9983
T
Overall assembly width
25.4
1
C
Cup / outer-ring width
20.638
0.8125
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)
31.750
Bore d (in)
1.2500
Outside dia. D (mm)
66.421
Outside dia. D (in)
2.6150
Width B (mm)
25.357
Overall width T (mm)
25.400
Overall width T (in)
1.0000
Cup width C (mm)
20.638
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
18800
Basic static load rating Cor (lbs)
21200
Basic dynamic load rating Cr (N)
83700
Basic static load rating C0r (N)
94400
Dynamic rating C1 (N, ISO)
83700
Dynamic rating C1 (lbf, ISO)
18800
Radial rating C90 (N)
21700
Radial rating C90 (lbf)
4880
Thrust rating Ca90 (N)
10200
Thrust rating Ca90 (lbf)
2280
Static rating C0 (N)
94400
Static rating C0 (lbf)
21200
Factor e
0.27
Factor Y
2.19
Factor K
2.14
Geometry factor G1
23.6
Geometry factor G2
9.6
Geometry factor Cg
0.0656
Effective load centre a (mm)
-8.6
Weight
Weight (kg)
0.4
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
0.8
Housing fillet r max (mm)
3.3
Shaft shoulder da (mm)
37.5
Shaft shoulder db (mm)
38.5
Housing shoulder Da (mm)
62.5
Housing shoulder Db (mm)
56.9
Cage projection Aa (mm)
0.8
Cage projection Ab (mm)
0.8
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
20,925
102
3,386
6
13,950
392
13,083
8
10,462
1,024
34,133
10
8,370
2,154
71,814
15
5,580
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 83,700 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.116 (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.
