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
25
0.9843
D
Outside diameter
80
3.1496
B
Inner-ring / bearing width
21
0.8268
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)
80
Outside dia. D (in)
3.1496
Width B (mm)
21
Width B (in)
0.8268
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
10500
Basic static load rating Cor (lbs)
8910
Limiting speed - grease (rpm)
9,000
Limiting speed - oil (rpm)
11,000
Weight
Weight (kg)
0.556
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.059
Fillet rb max (in)
0.059
Shaft shoulder da min (in)
1.299
Housing shoulder Da max (in)
2.835
Shaft shoulder db min (in)
1.299
Shaft shoulder db max (in)
1.457
Housing shoulder Db min (in)
2.520
Housing shoulder Db max (in)
2.835
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 3,000 rpm
4
11,677
102
564
6
7,784
392
2,181
8
5,838
1,024
5,689
10
4,671
2,154
11,969
15
3,114
8,323
46,241
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 46,706 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.
