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
55
2.1654
B
Inner-ring / bearing width
20
0.7874
T
Overall assembly width
20
0.7874
C
Cup / outer-ring width
16
0.6299
r
Chamfer (min)
1
0.0394
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)
55
Width B (mm)
20
Overall width T (mm)
20
Cup width C (mm)
16
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
11578
Basic static load rating Cor (lbs)
12140
Basic dynamic load rating Cr (N)
51500
Basic static load rating C0r (N)
54000
Limiting speed - grease (rpm)
6,700
Effective load centre a (mm)
1
Weight
Weight (kg)
0.208
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
1
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 2,200 rpm
4
12,875
102
770
6
8,583
392
2,973
8
6,438
1,024
7,758
10
5,150
2,154
16,321
15
3,433
8,323
63,057
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 51,500 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.
