Original catalogue drawing - NSK catalogue, page 21
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
50
1.9685
D
Outside diameter
65
2.5591
B
Inner-ring / bearing width
7
0.2756
r
Chamfer (min)
0.305
0.012
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)
50
Bore d (in)
1.9685
Outside dia. D (mm)
65
Outside dia. D (in)
2.5591
Width B (mm)
7
Width B (in)
0.2756
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
1440
Basic static load rating Cor (lbs)
1400
Limiting speed - grease (rpm)
9,500
Limiting speed - oil (rpm)
11,000
Factor f0
17.2
Weight
Weight (kg)
0.05
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.012
Shaft shoulder da min (in)
2.047
Shaft shoulder da max (in)
2.067
Housing shoulder Da max (in)
2.480
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 3,000 rpm
4
1,601
64
356
6
1,068
216
1,200
8
801
512
2,844
10
641
1,000
5,556
15
427
3,375
18,750
Basic rating life per ISO 281: L10 = (C/P)3 with C = 6,405 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 inch product catalogue
Catalogue page
p.23 (dimensions) / p.24 (ratings)
Dimensions in inches and millimetres, load ratings in lbs.
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.
