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
170
6.6929
D
Outside diameter
310
12.2047
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)
170
Outside dia. D (mm)
310
Width B (mm)
52
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
73063
Basic static load rating Cor (lbs)
80931
Basic dynamic load rating Cr (N)
325000
Basic static load rating C0r (N)
360000
Limiting speed - grease (rpm)
1,800
Limiting speed - oil (rpm)
2,400
Effective load centre a (mm)
95.3
Weight
Weight (kg)
17.3
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 600 rpm
4
81,250
64
1,778
6
54,167
216
6,000
8
40,625
512
14,222
10
32,500
1,000
27,778
15
21,667
3,375
93,750
Basic rating life per ISO 281: L10 = (C/P)3 with C = 325,000 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.217 (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.
