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
120
4.7244
D
Outside diameter
250
9.8425
T
Overall assembly width
78
3.0709
r
Chamfer (min)
4
0.1575
Notes
Thrust bearing ratings are axial values Ca / Coa; T is the overall height. 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)
120
Outside dia. D (mm)
250
Overall width T (mm)
78
Load ratings & speeds
Basic dynamic axial rating Ca (lbs)
260778
Basic static axial rating Coa (lbs)
764350
Basic dynamic axial rating Ca (N)
1160000
Basic static axial rating C0a (N)
3400000
Weight
Weight (kg)
16.6
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
4
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
290,000
102
3,386
6
193,333
392
13,083
8
145,000
1,024
34,133
10
116,000
2,154
71,814
15
77,333
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 1,160,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.
Source & traceability
Brand
NSK
Source catalogue
NSK CAT. No. E1103 (metric)
Catalogue page
p.333 (dimensions)
Load ratings in newtons, weights in kg, limiting speeds for grease and oil lubrication.
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.
