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
T
Overall assembly width
57
2.2441
C
Cup / outer-ring width
43
1.6929
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
Overall width T (mm)
57
Cup width C (mm)
43
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
174227
Basic static load rating Cor (lbs)
198956
Basic dynamic load rating Cr (N)
775000
Basic static load rating C0r (N)
885000
Limiting speed - grease (rpm)
1,100
Effective load centre a (mm)
5
Weight
Weight (kg)
17.1
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
4
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 300 rpm
4
193,750
102
5,644
6
129,167
392
21,805
8
96,875
1,024
56,889
10
77,500
2,154
119,691
15
51,667
8,323
462,415
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 775,000 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.268 (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.
