Original catalogue drawing - NSK catalogue, page 199
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
72
2.8346
B
Inner-ring / bearing width
12
0.4724
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)
72
Outside dia. D (in)
2.8346
Width B (mm)
12
Width B (in)
0.4724
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
3790
Basic static load rating Cor (lbs)
3370
Limiting speed - grease (rpm)
18,900
Limiting speed - oil (rpm)
28,700
Weight
Weight (kg)
0.127
Mounting dimensions (fillets / shoulders)
Fillet ra (in)
0.024
Fillet rb (in)
0.012
Shaft shoulder da (in)
2.165
Housing shoulder Da (in)
2.638
Housing shoulder Db (in)
2.736
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 3,000 rpm
4
4,215
64
356
6
2,810
216
1,200
8
2,107
512
2,844
10
1,686
1,000
5,556
15
1,124
3,375
18,750
Basic rating life per ISO 281: L10 = (C/P)3 with C = 16,859 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.201 (dimensions) / p.202 (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.
