Original catalogue drawing - NSK catalogue, page 137
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
73.025
2.875
D
Outside diameter
127
5
B
Inner-ring / bearing width
36.17
1.424
T
Overall assembly width
36.512
1.4375
C
Cup / outer-ring width
28.575
1.125
r
Chamfer (min)
3.556
0.14
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)
73.025
Bore d (in)
2.8750
Outside dia. D (mm)
127.000
Outside dia. D (in)
5.0000
Width B (in)
1.4240
Overall width T (mm)
36.512
Overall width T (in)
1.4375
Cup width C (in)
1.1250
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
37300
Basic static load rating Cor (lbs)
52600
Effective centre a (in)
1.12
Weight
Cone weight (kg)
1.152
Cup weight (kg)
0.653
Total weight (kg)
1.805
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.14
Chamfer r1 (in)
0.13
Shaft shoulder da min (in)
4.41
Shaft shoulder da (in)
3.19
Housing shoulder Da (in)
4.72
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
41,480
102
3,386
6
27,653
392
13,083
8
20,740
1,024
34,133
10
16,592
2,154
71,814
15
11,061
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 165,919 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.139 (dimensions) / p.140 (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.
