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NTN 339 is an inch-series tapered roller bearing cone with a straight bore. Designed for use with a matching cup, this single-row cone handles combined radial and axial loads in gearboxes, axle housings, and industrial machinery.
MODEL 339
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$58.92 Each
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Brand Minimum Order Quantity: 2
Typically Ships in: 1 day
Returnable:No
Height
3.15
I.D.
1.378 in
Length
3.15
O.D.
3.1496 in
Width
0.882
Technical Specifications
Type | Cone |
Bore Type | Round |
Material | Case Carburized Steel |
Static Load Rating | 16900 lbf75000 N75.00 kN |
Dynamic Load Rating | 15300 lbf68000 N68.00 kN |
| 0.860 lb0.390 kg | |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Y2 (Axial Load Factor) | 2.2 |
e (Axial Load Factor) | 0.27 |
Dimensional Specifications
| |
B | 1.3780 in35.001 mm |
Wi | 0.8820 in22.403 mm |
R | 0.0300 in0.800 mm |
U | 1.67 in42.5 mm |
V | 1.63 in41.5 mm |
a (Effective Load Center) | -0.2600 in-6.600 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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