Original catalogue drawing - NSK catalogue, page 149
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
120
4.7244
D
Outside diameter
250
9.8425
T
Overall assembly width
78
3.0709
C
Cup / outer-ring width
37.998
1.496
Notes
Thrust bearing ratings are axial values Ca / Coa; T is the overall height. 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)
120
Bore d (in)
4.7244
Outside dia. D (mm)
250
Outside dia. D (in)
9.8425
Overall width T (mm)
78
Overall width T (in)
3.0709
Cup width C (in)
1.496
Bore d1 (in)
8.465
Outside dia. D1 (in)
6.732
Load ratings & speeds
Basic dynamic axial rating Ca (lbs)
262000
Basic static axial rating Coa (lbs)
764000
Limiting speed - oil (rpm)
1,400
Weight
Weight (kg)
16.556
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.118
Shaft shoulder da min (in)
8.071
Housing shoulder Da (in)
7.087
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 400 rpm
4
291,359
102
4,233
6
194,239
392
16,354
8
145,679
1,024
42,667
10
116,543
2,154
89,768
15
77,696
8,323
346,811
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 1,165,434 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.151 (dimensions) / p.152 (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.