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
3.175
0.125
D
Outside diameter
6.35
0.25
B
Inner-ring / bearing width
2.38
0.0937
r
Chamfer (min)
0.1
0.0039
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)
3.175
Outside dia. D (mm)
6.350
Width B (mm)
2.380
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
70
Basic static load rating Cor (lbs)
21
Basic dynamic load rating Cr (N)
310
Basic static load rating C0r (N)
95
Limiting speed - grease (rpm)
67,000
Limiting speed - oil (rpm)
80,000
Weight
Weight (kg)
0.00027
Mounting dimensions (fillets / shoulders)
Housing fillet r max (mm)
0.1
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 3,000 rpm
4
78
64
356
6
52
216
1,200
8
39
512
2,844
10
31
1,000
5,556
15
21
3,375
18,750
Basic rating life per ISO 281: L10 = (C/P)3 with C = 310 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.199 (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.
