NTN 51109 Bearing — Specifications, Dimensions & Cross-Reference
The NTN 51109 is a thrust ball bearing manufactured by NTN. It belongs to the 51100 series and features dimensions of 45 × 65 × 14 mm (bore × OD × width). This bearing has a dynamic load rating of 29,600 N and a static load rating of 28,000 N, making it suitable for heavy-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 45 mm |
| Outside Diameter (D) | 65 mm |
| Width (B) | 14 mm |
| Weight | 0.130 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 29,600 N |
| Static Load Rating (C₀r) | 28,000 N |
| Limiting Speed (Grease) | 4,300 rpm |
| Limiting Speed (Oil) | 5,600 rpm |
Brand Cross-Reference — 51109 Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 51109. All share identical dimensions (45×65×14mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 51109 ✦ | 29,600 | 28,000 |
| NACHI | NACHI 51109 | 29,600 | 28,000 |
| KOYO | KOYO 51109 | 29,600 | 28,000 |
| Timken | Timken 51109 | 29,600 | 28,000 |
| FAG | FAG 51109 | 29,600 | 28,000 |
| NTN | NTN 51109 | 29,600 | 28,000 |
| NSK | NSK 51109 | 29,600 | 28,000 |
| SKF | SKF 51109 | 29,600 | 28,000 |
Available Variants
The NTN 51109 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NTN 51109?
The NTN 51109 has a bore diameter of 45mm, outside diameter of 65mm, and width of 14mm. It weighs 0.130kg.
What is the load capacity of the NTN 51109?
The dynamic load rating (Cr) is 29,600 N and the static load rating (C₀r) is 28,000 N. The maximum recommended speed is 4,300 rpm with grease lubrication or 5,600 rpm with oil lubrication.
What bearings are equivalent to NTN 51109?
The 51109 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 45×65×14mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.