Original catalogue drawing - Timken TRB Catalog, page 430
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
240
9.4488
D
Outside diameter
320
12.5984
B
Inner-ring / bearing width
51
2.0079
T
Overall assembly width
51
2.0079
C
Cup / outer-ring width
39
1.5354
r
Chamfer (min)
2.5
0.0984
Notes
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)
240.000
Bore d (in)
9.4488
Outside dia. D (mm)
320.000
Outside dia. D (in)
12.5984
Width B (mm)
51.000
Overall width T (mm)
51.000
Overall width T (in)
2.0079
Cup width C (mm)
39.000
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
128000
Basic static load rating Cor (lbs)
258000
Basic dynamic load rating Cr (N)
571000
Basic static load rating C0r (N)
1150000
Dynamic rating C1 (N, ISO)
571000
Dynamic rating C1 (lbf, ISO)
128000
Radial rating C90 (N)
148000
Radial rating C90 (lbf)
33300
Thrust rating Ca90 (N)
116000
Thrust rating Ca90 (lbf)
26100
Static rating C0 (N)
1150000
Static rating C0 (lbf)
258000
Factor e
0.46
Factor Y
1.31
Factor K
1.27
Geometry factor G1
1020.3
Geometry factor G2
205.6
Geometry factor Cg
0.1450
Effective load centre a (mm)
14.0
Weight
Weight (kg)
10.35
Mounting dimensions (fillets / shoulders)
Shaft fillet R max (mm)
3.0
Housing fillet r max (mm)
2.5
Shaft shoulder da (mm)
251.0
Shaft shoulder db (mm)
258.0
Housing shoulder Da (mm)
311.5
Housing shoulder Db (mm)
300.0
Cage projection Aa (mm)
4.1
Cage projection Ab (mm)
4.3
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
142,750
102
3,386
6
95,167
392
13,083
8
71,375
1,024
34,133
10
57,100
2,154
71,814
15
38,067
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 571,000 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.430 (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.
