Original catalogue drawing - NSK catalogue, page 59
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
25
0.9843
D
Outside diameter
47
1.8504
B
Inner-ring / bearing width
12
0.4724
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)
25
Bore d (in)
0.9843
Outside dia. D (mm)
47
Outside dia. D (in)
1.8504
Width B (mm)
12
Width B (in)
0.4724
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
3210
Basic static load rating Cor (lbs)
2930
Limiting speed - grease (rpm)
15,000
Limiting speed - oil (rpm)
18,000
Weight
Weight (kg)
0.095
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.024
Fillet rb max (in)
0.012
Shaft shoulder da min (in)
--
Housing shoulder Da max (in)
1.693
Shaft shoulder db min (in)
1.063
Shaft shoulder db max (in)
1.181
Housing shoulder Db min (in)
--
Housing shoulder Db max (in)
--
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 3,000 rpm
4
3,570
102
564
6
2,380
392
2,181
8
1,785
1,024
5,689
10
1,428
2,154
11,969
15
952
8,323
46,241
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 14,279 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.61 (dimensions) / p.62 (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.
