Original catalogue drawing - NSK catalogue, page 129
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
52
2.0472
B
Inner-ring / bearing width
18
0.7087
T
Overall assembly width
19.25
0.7579
C
Cup / outer-ring width
15
0.5906
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)
25
Bore d (in)
0.9843
Outside dia. D (mm)
52
Outside dia. D (in)
2.0472
Width B (mm)
18
Width B (in)
0.7087
Overall width T (mm)
19.25
Overall width T (in)
0.7579
Cup width C (mm)
15
Cup width C (in)
0.5906
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
7870
Basic static load rating Cor (lbs)
9440
Limiting speed - grease (rpm)
7,100
Limiting speed - oil (rpm)
9,500
Weight
Weight (kg)
0.188
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.039
Shaft shoulder da min (in)
1.340
Housing shoulder Da max (in)
1.812
Shaft shoulder db max (in)
1.182
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 2,300 rpm
4
8,752
102
736
6
5,835
392
2,844
8
4,376
1,024
7,420
10
3,501
2,154
15,612
15
2,334
8,323
60,315
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 35,008 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.131 (dimensions) / p.132 (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.