Original catalogue drawing - Timken TRB Catalog, page 366
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
317.5
12.5
D
Outside diameter
647.7
25.5
B
Inner-ring / bearing width
120.65
4.75
T
Overall assembly width
139.7
5.5
C
Cup / outer-ring width
88.9
3.5
r
Chamfer (min)
13.5
0.5315
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)
317.500
Bore d (in)
12.5000
Outside dia. D (mm)
647.700
Outside dia. D (in)
25.5000
Width B (mm)
120.650
Overall width T (mm)
139.700
Overall width T (in)
5.5000
Cup width C (mm)
88.900
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
528000
Basic static load rating Cor (lbs)
790000
Basic dynamic load rating Cr (N)
2350000
Basic static load rating C0r (N)
3520000
Dynamic rating C1 (N, ISO)
2350000
Dynamic rating C1 (lbf, ISO)
528000
Radial rating C90 (N)
609000
Radial rating C90 (lbf)
137000
Thrust rating Ca90 (N)
903000
Thrust rating Ca90 (lbf)
203000
Static rating C0 (N)
3520000
Static rating C0 (lbf)
790000
Factor e
0.87
Factor Y
0.69
Factor K
0.67
Geometry factor G1
2353.6
Geometry factor G2
161.7
Geometry factor Cg
0.2299
Effective load centre a (mm)
55.1
Weight
Weight (kg)
184.79
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
13.5
Housing fillet r max (mm)
13.5
Shaft shoulder da (mm)
371.0
Shaft shoulder db (mm)
394.0
Housing shoulder Da (mm)
587.0
Housing shoulder Db (mm)
546.0
Cage projection Aa (mm)
26.0
Cage projection Ab (mm)
22.7
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
587,500
102
3,386
6
391,667
392
13,083
8
293,750
1,024
34,133
10
235,000
2,154
71,814
15
156,667
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 2,350,000 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.366 (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.
