51202 bearing
15 × 32 mm · dynamic rating 15.9 kN · static rating 25 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
51202 specification
| Designation | 51202 |
| Type | Single-direction thrust ball bearing |
| Series | 512 light-medium |
| Bore diameter d | 15 mm |
| Outside diameter D | 32 mm |
| Basic dynamic load rating C | 15.9 kN (15,900 N) |
| Basic static load rating C0 | 25 kN (25,000 N) |
| Ratio C0/C | 1.57 |
| Speed guide, grease lubrication | 10,000 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 51202 means
| Code | Meaning |
|---|---|
| 512 | Single-direction thrust ball bearing, light-medium series (flat seat washers) |
| 02 | bore code "02" = 15 mm (one of the four fixed small-bore codes, not the ×5 rule) |
Basic rating life of the 51202
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 51202 with C = 15.9 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 3.18 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 51202
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 51202 is used
Thrust ball / thrust roller bearings are chosen for: Predominantly axial load. Typical equipment: Vertical pumps, extruders, turbines, marine and heavy gear drives. Thrust roller for higher axial capacity and shock.
Other sizes in the same series
The 51202 belongs to the “512 light-medium” series. The next size up, the 51203, has a bore of 17 mm and a rating of 16.3 kN (+3%).
Common problems on bearings like the 51202
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 51202
What are the dimensions of a 51202 bearing?
The 51202 has a bore of 15 mm and an outside diameter of 32 mm. It is a single-direction thrust ball bearing. Series: 512 light-medium.
What is the load rating of a 51202 bearing?
In the Rotec AI catalogue the 51202 has a basic dynamic load rating C of 15.9 kN and a basic static load rating C0 of 25 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 51202 bearing?
Use the Cross-Reference tool in Rotec AI to check brand equivalents for the 51202.