NTN 51109-NR Bearing — Specifications, Dimensions & Cross-Reference
The NTN 51109-NR is a thrust ball bearing with snap ring groove 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-NR Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 51109-NR. All share identical dimensions (45×65×14mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 51109-NR ✦ | 29,600 | 28,000 |
| NTN | NTN 51109-NR | 29,600 | 28,000 |
| NACHI | NACHI 51109-NR | 29,600 | 28,000 |
| KOYO | KOYO 51109-NR | 29,600 | 28,000 |
| FAG | FAG 51109-NR | 29,600 | 28,000 |
| Timken | Timken 51109-NR | 29,600 | 28,000 |
| NSK | NSK 51109-NR | 29,600 | 28,000 |
| SKF | SKF 51109-NR | 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-NR?
The NTN 51109-NR 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-NR?
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-NR?
The 51109-NR 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.