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
260
10.2362
D
Outside diameter
320
12.5984
B
Inner-ring / bearing width
60
2.3622
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)
260
Outside dia. D (mm)
320
Width B (mm)
60
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
141630
Basic static load rating Cor (lbs)
325973
Basic dynamic load rating Cr (N)
630000
Basic static load rating C0r (N)
1450000
Weight
Weight (kg)
11.0
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
157,500
102
3,386
6
105,000
392
13,083
8
78,750
1,024
34,133
10
63,000
2,154
71,814
15
42,000
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 630,000 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.251 (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.
