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NTN 48393/48320D+A is an inch series tapered roller bearing assembly consisting of a 48393 cone and a 48320D double cup. It features a straight bore, open enclosure, and case carburized steel construction for durability under heavy radial and axial loads. Suitable for industrial gearboxes and axle applications.
MODEL 48393/48320D+A
$1,274.26 Each
Prices are subject to change
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Returnable:No
B (in)
5.3750
Bore Type
Round
Bore type
Round
Cone Number
48393
Configuration
Two
Cup Number
48320D
D (in)
7.5000
Dynamic Load Rating
58500 lbf
Dynamic load rating
58500 lbf
e (Axial Load Factor)
0.32
Enclosure
Open
Lubrication
w/o Oil Hole
Material
Case carburized steel
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision Rating
Class 2
Precision rating
Class 2
r (in)
0.0300
R (in)
0.14
Static Load Rating
123000 lbf
Static load rating
123000 lbf
Style
TDO
Type
Tapered Roller Bearing
Wi
3.3750 in
Width
3.375
Wo
2.8750 in
Y2 (Axial Load Factor)
1.87
Technical Specifications
| Type | Tapered Roller Bearing |
|---|---|
| Bore Type | Round |
| Material | Case Carburized Steel |
| Style | TDO |
| Precision Rating | Class 2 |
| Cone N / umber | 48393 |
| Cup N / umber | 48320D |
| Configuration | Two |
| Lubrication | w/o Oil Hole |
| e (Axial Load Factor) | 0.32 |
| Y2 (Axial Load Factor) | 1.87 |
| Static Load Rating | 123000 lbf / 545000 N / 545.00 kN |
| Dynamic Load Rating | 58500 lbf / 261000 N / 261.00 kN |
| Enclosure | Open |
| Operating Temperature Range | -40 to 250 ºF / -40 to 120 ºC |
Dimensional Specifications
| B | 5.3750 in / 136.525 mm |
|---|---|
| D | 7.5000 in / 190.500 mm |
| Wo | 2.8750 in / 73.025 mm |
| Wi | 3.3750 in / 85.725 mm |
| r | 0.0300 in / 0.800 mm |
| R | 0.14 in / 3.5 mm |
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
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