30236 bearing
180 × 320 mm · dynamic rating 629 kN · static rating 815 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
30236 specification
| Designation | 30236 |
| Type | Tapered roller bearing |
| Series | 302 standard-angle |
| Bore diameter d | 180 mm |
| Outside diameter D | 320 mm |
| Basic dynamic load rating C | 629 kN (629,000 N) |
| Basic static load rating C0 | 815 kN (815,000 N) |
| Ratio C0/C | 1.30 |
| Speed guide, grease lubrication | 2,000 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 30236 means
| Code | Meaning |
|---|---|
| 302 | Tapered roller bearing, standard contact angle series |
| 36 | bore code "36" = 36 × 5 = 180 mm |
Basic rating life of the 30236
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 30236 with C = 629 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 125.8 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 30236
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 30236 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 30236 belongs to the “302 standard-angle” series. The next size down, the 30234, has a bore of 170 mm and a dynamic rating of 657 kN. The next size up, the 30238, has a bore of 190 mm and a rating of 763 kN (+21%).
Common problems on bearings like the 30236
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 30236
What are the dimensions of a 30236 bearing?
The 30236 has a bore of 180 mm and an outside diameter of 320 mm. It is a tapered roller bearing. Series: 302 standard-angle.
What is the load rating of a 30236 bearing?
In the Rotec AI catalogue the 30236 has a basic dynamic load rating C of 629 kN and a basic static load rating C0 of 815 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 30236 bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the 30236.