7317 BEP /DB bearing
85 × 180 mm · dynamic rating 236.52 kN · static rating 244 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
7317 BEP /DB specification
| Designation | 7317 BEP /DB |
| Type | Matched pair of angular contact ball bearings (back-to-back) |
| Series | 73 medium (pair) |
| Bore diameter d | 85 mm |
| Outside diameter D | 180 mm |
| Basic dynamic load rating C | 236.52 kN (236,520 N) |
| Basic static load rating C0 | 244 kN (244,000 N) |
| Ratio C0/C | 1.03 |
| Speed guide, grease lubrication | 3,870 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 7317 BEP /DB means
| Code | Meaning |
|---|---|
| 73 | Angular contact ball bearing, medium dimension series |
| 17 | bore code "17" = 17 × 5 = 85 mm |
| B | 40° contact angle |
| E | Optimized internal design |
| P | Glass-fibre-reinforced PA66 cage, ball-centred |
| /DB | Two bearings mounted back-to-back as a matched pair — carries combined radial + axial load from both directions with high stiffness |
Basic rating life of the 7317 BEP /DB
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 7317 BEP /DB with C = 236.52 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 47.3 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 7317 BEP /DB
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 7317 BEP /DB 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 7317 BEP /DB is size 17 of 20 in the Rotec AI catalogue for the “73 medium (pair)” series. The next size down, the 7316 BEP /DB, has a bore of 80 mm and a dynamic rating of 218.7 kN. The next size up, the 7318 BEP /DB, has a bore of 90 mm and a rating of 252.72 kN (+7%).
Common problems on bearings like the 7317 BEP /DB
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 7317 BEP /DB
What are the dimensions of a 7317 BEP /DB bearing?
The 7317 BEP /DB has a bore of 85 mm and an outside diameter of 180 mm. It is a matched pair of angular contact ball bearings (back-to-back). Series: 73 medium (pair).
What is the load rating of a 7317 BEP /DB bearing?
In the Rotec AI catalogue the 7317 BEP /DB has a basic dynamic load rating C of 236.52 kN and a basic static load rating C0 of 244 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 7317 BEP /DB bearing?
Brand equivalents for the 7317 BEP /DB are not yet in the Rotec AI tables. Use the Cross-Reference tool to check other designations.