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
180
7.0866
D
Outside diameter
250
9.8425
T
Overall assembly width
56
2.2047
r
Chamfer (min)
1.5
0.0591
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)
180
Outside dia. D (mm)
250
Overall width T (mm)
56
Load ratings & speeds
Basic dynamic axial rating Ca (lbs)
63846
Basic static axial rating Coa (lbs)
214693
Basic dynamic axial rating Ca (N)
284000
Basic static axial rating C0a (N)
955000
Limiting speed - grease (rpm)
800
Limiting speed - oil (rpm)
1,200
Weight
Weight (kg)
8.57
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
1.5
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 200 rpm
4
71,000
102
8,466
6
47,333
392
32,708
8
35,500
1,024
85,333
10
28,400
2,154
179,536
15
18,933
8,323
693,622
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 284,000 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.317 (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.
