Original catalogue drawing - NSK catalogue, page 113
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
140
5.5118
D
Outside diameter
250
9.8425
B
Inner-ring / bearing width
68
2.6772
T
Overall assembly width
71.75
2.8248
C
Cup / outer-ring width
58
2.2835
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)
140
Bore d (in)
5.5118
Outside dia. D (mm)
250
Outside dia. D (in)
9.8425
Width B (mm)
68
Width B (in)
2.6772
Overall width T (mm)
71.75
Overall width T (in)
2.8248
Cup width C (mm)
58
Cup width C (in)
2.2835
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
137000
Basic static load rating Cor (lbs)
206000
Limiting speed - grease (rpm)
1,400
Limiting speed - oil (rpm)
1,900
Weight
Weight (kg)
14.256
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
2.50
Shaft shoulder da min (in)
6.220
Housing shoulder Da max (in)
9.291
Shaft shoulder db max (in)
6.260
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 400 rpm
4
152,352
102
4,233
6
101,568
392
16,354
8
76,176
1,024
42,667
10
60,941
2,154
89,768
15
40,627
8,323
346,811
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 609,406 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.115 (dimensions) / p.116 (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.