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
280
11.0236
B
Inner-ring / bearing width
46
1.811
r
Chamfer (min)
2.1
0.0827
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)
280
Width B (mm)
46
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
51256
Basic static load rating Cor (lbs)
56652
Basic dynamic load rating Cr (N)
228000
Basic static load rating C0r (N)
252000
Limiting speed - grease (rpm)
1,900
Limiting speed - oil (rpm)
2,400
Effective load centre a (mm)
89.4
Weight
Weight (kg)
10.5
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
2.1
Chamfer r1 min (mm)
1.1
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 600 rpm
4
57,000
64
1,778
6
38,000
216
6,000
8
28,500
512
14,222
10
22,800
1,000
27,778
15
15,200
3,375
93,750
Basic rating life per ISO 281: L10 = (C/P)3 with C = 228,000 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.
