Original catalogue drawing - NSK catalogue, page 117
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
240
9.4488
D
Outside diameter
320
12.5984
B
Inner-ring / bearing width
51
2.0079
T
Overall assembly width
51
2.0079
C
Cup / outer-ring width
39
1.5354
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)
240
Bore d (in)
9.4488
Outside dia. D (mm)
320
Outside dia. D (in)
12.5984
Width B (mm)
51.0000
Width B (in)
2.0079
Overall width T (mm)
51
Overall width T (in)
2.0079
Cup width C (mm)
39
Cup width C (in)
1.5354
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
112000
Basic static load rating Cor (lbs)
234000
Limiting speed - grease (rpm)
900
Limiting speed - oil (rpm)
1,300
Weight
Weight (kg)
11.104
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.10
Shaft shoulder da min (in)
10.394
Housing shoulder Da max (in)
12.126
Shaft shoulder db max (in)
0.409
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 300 rpm
4
124,550
102
5,644
6
83,033
392
21,805
8
62,275
1,024
56,889
10
49,820
2,154
119,691
15
33,213
8,323
462,415
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 498,201 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.119 (dimensions) / p.120 (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.
