RNA 4828 bearing
155 × 175 mm · dynamic rating 121 kN · static rating 345 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
RNA 4828 specification
| Designation | RNA 4828 |
| Type | Needle roller bearing |
| Series | — |
| Bore diameter d | 155 mm |
| Outside diameter D | 175 mm |
| Basic dynamic load rating C | 121 kN (121,000 N) |
| Basic static load rating C0 | 345 kN (345,000 N) |
| Ratio C0/C | 2.85 |
| Speed guide, grease lubrication | 3,000 rpm |
| Life exponent p | 10/3 (roller bearing) |
Values come from the Rotec AI bearing catalogue and are indicative. Confirm against the manufacturer's current catalogue before ordering. Not every dimension (such as width) is listed here.
What the designation RNA 4828 means
| Code | Meaning |
|---|---|
| NK | Needle roller bearing, machined ring with flange, no inner ring — the hardened/ground shaft itself serves as the inner raceway |
Basic rating life of the RNA 4828
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 10/3 (roller bearing). For a RNA 4828 with C = 121 kN, the table shows what that gives at different load levels. It is the ISO 281 basic life only: it does not include lubrication, contamination, misalignment or reliability modifiers.
| C / P | P as share of C | L10 (million rev) | L10 at 1,500 rpm | L10 at 3,000 rpm |
|---|---|---|---|---|
| 3 | 33.3% | 39 | 430 | 220 |
| 5 | 20.0% | 214 | 2,400 | 1,200 |
| 8 | 12.5% | 1,024 | 11,400 | 5,700 |
| 12 | 8.3% | 3,956 | 44,000 | 22,000 |
For example, a C / P of 5 means the equivalent load is 24.2 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the RNA 4828
Brand-by-brand equivalents for this exact designation are not shown here. The Cross-Reference tool accepts SKF, FAG, NSK, NTN, Timken, Koyo and NRB designations, and shows what is catalogued.
Where the RNA 4828 is used
Needle roller bearings are chosen for: High radial load in limited radial space. Typical equipment: Transmissions, actuators, mobile equipment, compact machinery. Requires hardened raceways or inner ring; alignment sensitivity.
Other sizes in the same series
The RNA 4828 belongs to the “” series. The next size down, the RNA 4824, has a bore of 130 mm and a dynamic rating of 99 kN. The next size up, the RNA 4832, has a bore of 175 mm and a rating of 157 kN (+30%).
Common problems on bearings like the RNA 4828
Most field failures trace back to lubrication, contamination, fits and alignment rather than the bearing itself. These guides explain how to recognise and prevent them:
Questions about the RNA 4828
What are the dimensions of a RNA 4828 bearing?
The RNA 4828 has a bore of 155 mm and an outside diameter of 175 mm. It is a needle roller bearing.
What is the load rating of a RNA 4828 bearing?
In the Rotec AI catalogue the RNA 4828 has a basic dynamic load rating C of 121 kN and a basic static load rating C0 of 345 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a RNA 4828 bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the RNA 4828.