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
25
0.9843
D
Outside diameter
47
1.8504
B
Inner-ring / bearing width
8
0.315
r
Chamfer (min)
0.3
0.0118
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)
25
Outside dia. D (mm)
47
Width B (mm)
8
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
2192
Basic static load rating Cor (lbs)
1259
Basic dynamic load rating Cr (N)
9750
Basic static load rating C0r (N)
5600
Factor f0
15.1
Limiting speed - grease (rpm)
15,000
Limiting speed - oil (rpm)
18,000
Weight
Weight (kg)
0.059
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
0.3
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 3,000 rpm
4
2,438
64
356
6
1,625
216
1,200
8
1,219
512
2,844
10
975
1,000
5,556
15
650
3,375
18,750
Basic rating life per ISO 281: L10 = (C/P)3 with C = 9,750 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.177 (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.
