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
180
7.0866
D
Outside diameter
320
12.5984
B
Inner-ring / bearing width
52
2.0472
r
Chamfer (min)
4
0.1575
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)
180
Outside dia. D (mm)
320
Width B (mm)
52
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
75311
Basic static load rating Cor (lbs)
86551
Basic dynamic load rating Cr (N)
335000
Basic static load rating C0r (N)
385000
Limiting speed - grease (rpm)
1,700
Limiting speed - oil (rpm)
2,200
Effective load centre a (mm)
98.2
Weight
Weight (kg)
18.1
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
4
Chamfer r1 min (mm)
1.5
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
83,750
64
2,133
6
55,833
216
7,200
8
41,875
512
17,067
10
33,500
1,000
33,333
15
22,333
3,375
112,500
Basic rating life per ISO 281: L10 = (C/P)3 with C = 335,000 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.218 (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.
