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NTN 557S single row tapered roller bearing, straight bore, inch series. Designed for combined radial and axial loads in industrial gearboxes, conveyors, and axle housings.
MODEL 557S
$87.88 Each
Prices are subject to change
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Returnable:No
I.D.
2.125 in
O.D.
4.8125 in
Width
1.444 in
Technical Specifications
Type | Cone |
|---|---|
Bore Type | Round |
Material | Case Carburized Steel |
Static Load Rating | 55000 lbf245000 N245.00 kN |
Dynamic Load Rating | 39000 lbf173000 N173.00 kN |
Weight | 3.300 lb1.497 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Y2 (Axial Load Factor) | 1.73 |
e (Axial Load Factor) | 0.35 |
Dimensional Specifications
| |
B | 2.1250 in53.975 mm |
|---|---|
Wi | 1.4440 in36.678 mm |
R | 0.1400 in3.600 mm |
U | 2.80 in71.0 mm |
V | 2.56 in65.0 mm |
a (Effective Load Center) | -0.3700 in-9.400 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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