7240 BCBM bearing
200 × 360 mm · dynamic rating 325 kN · static rating 430 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
7240 BCBM specification
| Designation | 7240 BCBM |
| Type | Single-row angular contact ball bearing |
| Series | 72 light |
| Bore diameter d | 200 mm |
| Outside diameter D | 360 mm |
| Basic dynamic load rating C | 325 kN (325,000 N) |
| Basic static load rating C0 | 430 kN (430,000 N) |
| Ratio C0/C | 1.32 |
| Speed guide, grease lubrication | 2,400 rpm |
| Life exponent p | 3 (ball 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 7240 BCBM means
| Code | Meaning |
|---|---|
| 72 | Angular contact ball bearing, light dimension series |
| 40 | bore code "40" = 40 × 5 = 200 mm |
| B | 40° contact angle |
| CB | Normal axial internal clearance for a matched pair (universal matching) |
Basic rating life of the 7240 BCBM
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 7240 BCBM with C = 325 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% | 27 | 300 | 150 |
| 5 | 20.0% | 125 | 1,400 | 690 |
| 8 | 12.5% | 512 | 5,700 | 2,800 |
| 12 | 8.3% | 1,728 | 19,200 | 9,600 |
For example, a C / P of 5 means the equivalent load is 65 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 7240 BCBM
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 7240 BCBM is used
Angular-contact ball bearings are chosen for: Combined radial and axial load; precision/high-speed arrangements. Typical equipment: Pumps, compressors, spindles, generators, aerospace accessories. Often paired/preloaded; contact angle and lubrication matter.
Other sizes in the same series
The 7240 BCBM belongs to the “72 light” series. The next size down, the 7238 BCBM, has a bore of 190 mm and a dynamic rating of 307 kN.
Common problems on bearings like the 7240 BCBM
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 7240 BCBM
What are the dimensions of a 7240 BCBM bearing?
The 7240 BCBM has a bore of 200 mm and an outside diameter of 360 mm. It is a single-row angular contact ball bearing. Series: 72 light.
What is the load rating of a 7240 BCBM bearing?
In the Rotec AI catalogue the 7240 BCBM has a basic dynamic load rating C of 325 kN and a basic static load rating C0 of 430 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 7240 BCBM bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the 7240 BCBM.