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
12
0.4724
r
Chamfer (min)
0.6
0.0236
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)
12
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
2788
Basic static load rating Cor (lbs)
1664
Basic dynamic load rating Cr (N)
12400
Basic static load rating C0r (N)
7400
Limiting speed - grease (rpm)
12,000
Limiting speed - oil (rpm)
17,000
Effective load centre a (mm)
16.4
Weight
Weight (kg)
0.079
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
0.6
Chamfer r1 min (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
3,100
64
356
6
2,067
216
1,200
8
1,550
512
2,844
10
1,240
1,000
5,556
15
827
3,375
18,750
Basic rating life per ISO 281: L10 = (C/P)3 with C = 12,400 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.210 (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.
