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
240
9.4488
D
Outside diameter
300
11.811
B
Inner-ring / bearing width
28
1.1024
r
Chamfer (min)
2
0.0787
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)
240
Outside dia. D (mm)
300
Width B (mm)
28
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
24279
Basic static load rating Cor (lbs)
30799
Basic dynamic load rating Cr (N)
108000
Basic static load rating C0r (N)
137000
Factor f0
17.3
Limiting speed - grease (rpm)
1,700
Limiting speed - oil (rpm)
2,000
Weight
Weight (kg)
4.48
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
2
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
27,000
64
2,133
6
18,000
216
7,200
8
13,500
512
17,067
10
10,800
1,000
33,333
15
7,200
3,375
112,500
Basic rating life per ISO 281: L10 = (C/P)3 with C = 108,000 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.185 (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.
