Original catalogue drawing - NSK catalogue, page 133
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
25.4
1
D
Outside diameter
50.005
1.9687
B
Inner-ring / bearing width
14.26
0.5614
T
Overall assembly width
13.495
0.5313
C
Cup / outer-ring width
9.525
0.375
r
Chamfer (min)
1.016
0.04
Notes
Tapered roller bearings are cone / cup assemblies; cone and cup weights are listed separately and the total is their sum. 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)
25.400
Bore d (in)
1.0000
Outside dia. D (mm)
50.005
Outside dia. D (in)
1.9687
Width B (in)
0.5614
Overall width T (mm)
13.495
Overall width T (in)
0.5313
Cup width C (in)
0.3750
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
10000
Basic static load rating Cor (lbs)
12500
Effective centre a (in)
0.42
Weight
Cone weight (kg)
0.082
Cup weight (kg)
0.032
Total weight (kg)
0.113
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.04
Chamfer r1 (in)
0.04
Shaft shoulder da min (in)
1.75
Shaft shoulder da (in)
1.16
Housing shoulder Da (in)
1.85
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
11,121
102
3,386
6
7,414
392
13,083
8
5,560
1,024
34,133
10
4,448
2,154
71,814
15
2,965
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 44,482 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.135 (dimensions) / p.136 (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.
