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
68.262
2.6875
B
Inner-ring / bearing width
26.988
1.0625
T
Overall assembly width
26.988
1.0625
C
Cup / outer-ring width
22.225
0.875
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)
68.262
Outside dia. D (in)
2.6875
Width B (mm)
26.988
Overall width T (mm)
26.988
Overall width T (in)
1.0625
Cup width C (mm)
22.225
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
18100
Basic static load rating Cor (lbs)
20500
Basic dynamic load rating Cr (N)
80700
Basic static load rating C0r (N)
91000
Dynamic rating C1 (N, ISO)
80700
Dynamic rating C1 (lbf, ISO)
18100
Radial rating C90 (N)
20900
Radial rating C90 (lbf)
4700
Thrust rating Ca90 (N)
12600
Thrust rating Ca90 (lbf)
2830
Static rating C0 (N)
91000
Static rating C0 (lbf)
20500
Factor e
0.35
Factor Y
1.71
Factor K
1.66
Geometry factor G1
21.9
Geometry factor G2
10.4
Geometry factor Cg
0.0697
Effective load centre a (mm)
-8.6
Weight
Weight (kg)
0.46
Cup weight (kg)
0.17
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
1.5
Housing fillet r max (mm)
1.5
Shaft shoulder da (mm)
39.0
Shaft shoulder db (mm)
41.0
Housing shoulder Da (mm)
64.0
Housing shoulder Db (mm)
59.0
Cage projection Aa (mm)
1.6
Cage projection Ab (mm)
0.7
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
20,175
102
3,386
6
13,450
392
13,083
8
10,088
1,024
34,133
10
8,070
2,154
71,814
15
5,380
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 80,700 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) / p.78 (cup)
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.
