Original catalogue drawing - NSK catalogue, page 135
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
45.242
1.7812
D
Outside diameter
77.788
3.0625
B
Inner-ring / bearing width
19.842
0.7812
T
Overall assembly width
19.842
0.7812
C
Cup / outer-ring width
15.08
0.5937
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)
45.242
Bore d (in)
1.7812
Outside dia. D (mm)
77.788
Outside dia. D (in)
3.0625
Width B (in)
0.7812
Overall width T (mm)
19.842
Overall width T (in)
0.7812
Cup width C (in)
0.5937
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
12600
Basic static load rating Cor (lbs)
16000
Effective centre a (in)
0.69
Weight
Cone weight (kg)
0.24
Cup weight (kg)
0.122
Total weight (kg)
0.363
Mounting dimensions (fillets / shoulders)
Chamfer r (in)
0.14
Chamfer r1 (in)
0.03
Shaft shoulder da min (in)
2.80
Shaft shoulder da (in)
1.97
Housing shoulder Da (in)
2.91
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 500 rpm
4
14,012
102
3,386
6
9,341
392
13,083
8
7,006
1,024
34,133
10
5,605
2,154
71,814
15
3,737
8,323
277,449
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 56,048 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.137 (dimensions) / p.138 (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.
