Original catalogue drawing - NSK catalogue, page 57
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
Notes
Cylindrical roller entries from the NSK inch catalogue are series numbers covering the N / NU / NJ / NUP / NH prefixes of the same size. 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)
29000
Basic static load rating Cor (lbs)
27700
Limiting speed - grease (rpm)
5,000
Limiting speed - oil (rpm)
6,000
Weight
Weight (kg)
1.956
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.079
Fillet rb max (in)
0.079
Shaft shoulder da min (in)
2.402
Housing shoulder Da max (in)
4.685
Shaft shoulder db min (in)
2.402
Shaft shoulder db max (in)
2.677
Housing shoulder Db min (in)
4.449
Housing shoulder Db max (in)
4.685
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 1,600 rpm
4
32,250
102
1,058
6
21,500
392
4,089
8
16,125
1,024
10,667
10
12,900
2,154
22,442
15
8,600
8,323
86,703
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 128,998 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.59 (dimensions) / p.60 (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.
