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NTN RNA4852 is a machined ring needle roller bearing without inner ring, featuring a 260 mm bore. It is open (unsealed) with a steel cage, constructed from high carbon chrome steel. Designed for applications requiring high radial load capacity in a compact cross-section, such as gearboxes and industrial machinery.
MODEL RNA4852
$1,143.87 Each
Prices are subject to change
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Returnable:No
Bearing Type
Needle roller bearing
Cage
Steel
Enclosure
Open
I.D.
285 mm
Material
High carbon chrome steel
O.D.
320 mm
Width
60 mm
Technical Specifications
| Type | Needle Roller Bearing |
|---|---|
| Roller Type | Needle |
| Configuration | One |
| Material | High Carbon Chrome Steel |
| Cage Material | Steel |
| Limiting Speed - Oil | 1400 RPM |
| Limiting Speed - Grease | 950 RPM |
| Precision | ISO Class 0 |
| Enclosure | Open |
| Static Load Rating | 261000 lbf1160000 N1160.00 kN |
| Dynamic Load Rating | 84500 lbf375000 N375.00 kN |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| Fw | 11.2205 in285.000 mm |
|---|---|
| Fw Tolerance | 0.088/0.056 mm |
| D | 12.5984 in320.000 mm |
| C | 2.3622 in60.000 mm |
| r | 0.0787 in2.000 mm |
| Da max | 12.2441 in311.000 mm |
| ras max | 0.0787 in2.000 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.
| Brand | MROSupply Fasteners |
| Model | FSTPCK-876322 |