Original catalogue drawing - NSK catalogue, page 41
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
130
5.1181
B
Inner-ring / bearing width
31
1.2205
r
Chamfer (min)
2.007
0.079
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)
130
Outside dia. D (in)
5.1181
Width B (mm)
31
Width B (in)
1.2205
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
18900
Basic static load rating Cor (lbs)
12200
Limiting speed - grease (rpm)
4,500
Limiting speed - oil (rpm)
6,000
Weight
Weight (kg)
2.177
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.079
Shaft shoulder da min (in)
2.441
Housing shoulder Da max (in)
4.646
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 1,500 rpm
4
21,018
64
711
6
14,012
216
2,400
8
10,509
512
5,689
10
8,407
1,000
11,111
15
5,605
3,375
37,500
Basic rating life per ISO 281: L10 = (C/P)3 with C = 84,071 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.43 (dimensions) / p.44 (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.
