30218 bearing
90 × 160 mm · dynamic rating 240 kN · static rating 245 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
30218 specification
| Designation | 30218 |
| Type | Tapered roller bearing |
| Series | 302 standard-angle |
| Bore diameter d | 90 mm |
| Outside diameter D | 160 mm |
| Basic dynamic load rating C | 240 kN (240,000 N) |
| Basic static load rating C0 | 245 kN (245,000 N) |
| Ratio C0/C | 1.02 |
| Speed guide, grease lubrication | 4,000 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 30218 means
| Code | Meaning |
|---|---|
| 302 | Tapered roller bearing, standard contact angle series |
| 18 | bore code "18" = 18 × 5 = 90 mm |
Basic rating life of the 30218
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 30218 with C = 240 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 48 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 30218
Brand-by-brand equivalents for this exact designation are not yet in the Rotec AI cross-reference tables. The Cross-Reference tool accepts SKF, FAG, NSK, NTN, Timken, Koyo and NRB designations, and shows what is catalogued.
Where the 30218 is used
Tapered roller bearings are chosen for: Combined radial and axial load; stiffness. Typical equipment: Wheel hubs, gearboxes, rail wheelsets, construction/agri equipment. Usually adjusted/preloaded; paired arrangements common.
Other sizes in the same series
The 30218 is size 17 of 28 in the Rotec AI catalogue for the “302 standard-angle” series. The next size down, the 30217, has a bore of 85 mm and a dynamic rating of 216 kN. The next size up, the 30219, has a bore of 95 mm and a rating of 266 kN (+11%).
Common problems on bearings like the 30218
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 30218
What are the dimensions of a 30218 bearing?
The 30218 has a bore of 90 mm and an outside diameter of 160 mm. It is a tapered roller bearing. Series: 302 standard-angle.
What is the load rating of a 30218 bearing?
In the Rotec AI catalogue the 30218 has a basic dynamic load rating C of 240 kN and a basic static load rating C0 of 245 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 30218 bearing?
Brand equivalents for the 30218 are not yet in the Rotec AI tables. Use the Cross-Reference tool to check other designations.