Original catalogue drawing - Timken TRB Catalog, page 194
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
49.987
1.968
D
Outside diameter
79.975
3.1486
B
Inner-ring / bearing width
18.258
0.7188
T
Overall assembly width
18.258
0.7188
C
Cup / outer-ring width
14.288
0.5625
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)
49.987
Bore d (in)
1.9680
Outside dia. D (mm)
79.975
Outside dia. D (in)
3.1486
Width B (mm)
18.258
Overall width T (mm)
18.258
Overall width T (in)
0.7188
Cup width C (mm)
14.288
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
13700
Basic static load rating Cor (lbs)
20000
Basic dynamic load rating Cr (N)
60800
Basic static load rating C0r (N)
88800
Dynamic rating C1 (N, ISO)
60800
Dynamic rating C1 (lbf, ISO)
13700
Radial rating C90 (N)
15800
Radial rating C90 (lbf)
3540
Thrust rating Ca90 (N)
9590
Thrust rating Ca90 (lbf)
2160
Static rating C0 (N)
88800
Static rating C0 (lbf)
20000
Factor e
0.36
Factor Y
1.69
Factor K
1.64
Geometry factor G1
38.8
Geometry factor G2
29.8
Geometry factor Cg
0.0841
Effective load centre a (mm)
-2.5
Weight
Weight (kg)
0.34
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
1.5
Housing fillet r max (mm)
1.5
Shaft shoulder da (mm)
55.0
Shaft shoulder db (mm)
57.0
Housing shoulder Da (mm)
76.0
Housing shoulder Db (mm)
73.0
Cage projection Aa (mm)
0.2
Cage projection Ab (mm)
2.0
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
15,200
102
3,386
6
10,133
392
13,083
8
7,600
1,024
34,133
10
6,080
2,154
71,814
15
4,053
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 60,800 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.194 (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.
