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The NTN 3979 is an inch-series single-row tapered roller bearing with a straight bore. Designed for radial and axial load combinations, it is commonly used in gearboxes, conveyor systems, and industrial machinery. This bearing is unsealed and features a stamped steel cage.
MODEL 3979
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$63.02 Each
Prices are subject to change
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Brand Minimum Order Quantity: 2
Typically Ships in: 1 day
Returnable:No
Height
4.438
I.D.
2.25 in
Length
4.438
O.D.
4.3301 in
Width
1.183
Technical Specifications
| Type | Cone |
|---|---|
| Bore Type | Round |
| Material | Case Carburized Steel |
| Static Load Rating | 42000 lbf187000 N187.00 kN |
| Dynamic Load Rating | 28100 lbf125000 N125.00 kN |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
| Y2 (Axial Load Factor) | 1.49 |
| e (Axial Load Factor) | 0.40 |
Dimensional Specifications
| |
| B | 2.2500 in57.150 mm |
|---|---|
| Wi | 1.1830 in30.048 mm |
| R | 0.1400 in3.600 mm |
| U | 2.83 in72.0 mm |
| V | 2.60 in66.0 mm |
| a (Effective Load Center) | -0.1800 in-4.600 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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