Original catalogue drawing - NSK catalogue, page 61
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
180
7.0866
D
Outside diameter
320
12.5984
B
Inner-ring / bearing width
86
3.3858
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)
180
Bore d (in)
7.0866
Outside dia. D (mm)
320
Outside dia. D (in)
12.5984
Width B (mm)
86
Width B (in)
3.3858
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
167000
Basic static load rating Cor (lbs)
257000
Limiting speed - grease (rpm)
1,700
Limiting speed - oil (rpm)
2,000
Weight
Weight (kg)
30.391
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.118
Fillet rb max (in)
0.118
Shaft shoulder da min (in)
7.717
Housing shoulder Da max (in)
11.969
Shaft shoulder db min (in)
7.717
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
185,713
102
3,386
6
123,809
392
13,083
8
92,857
1,024
34,133
10
74,285
2,154
71,814
15
49,524
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 742,853 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.63 (dimensions) / p.64 (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.
