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
30
1.1811
D
Outside diameter
47
1.8504
B
Inner-ring / bearing width
12
0.4724
T
Overall assembly width
12
0.4724
C
Cup / outer-ring width
9
0.3543
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)
30
Outside dia. D (mm)
47
Width B (mm)
12
Overall width T (mm)
12
Cup width C (mm)
9
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
4878
Basic static load rating Cor (lbs)
5485
Basic dynamic load rating Cr (N)
21700
Basic static load rating C0r (N)
24400
Limiting speed - grease (rpm)
7,500
Effective load centre a (mm)
0.3
Weight
Weight (kg)
0.074
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 2,500 rpm
4
5,425
102
677
6
3,617
392
2,617
8
2,712
1,024
6,827
10
2,170
2,154
14,363
15
1,447
8,323
55,490
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 21,700 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.262 (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.
