NTN 1203 Bearing — Specifications, Dimensions & Cross-Reference
The NTN 1203 is a self-aligning ball bearing manufactured by NTN. It belongs to the 1200 series and features dimensions of 17 × 40 × 12 mm (bore × OD × width). This bearing has a dynamic load rating of 7,020 N and a static load rating of 2,240 N, making it suitable for light-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 17 mm |
| Outside Diameter (D) | 40 mm |
| Width (B) | 12 mm |
| Weight | 0.056 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 7,020 N |
| Static Load Rating (C₀r) | 2,240 N |
| Limiting Speed (Grease) | 15,000 rpm |
| Limiting Speed (Oil) | 19,000 rpm |
Brand Cross-Reference — 1203 Equivalents
The following bearings from other manufacturers are interchangeable with the NTN 1203. All share identical dimensions (17×40×12mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| NTN | NTN 1203 ✦ | 7,020 | 2,240 |
| Timken | Timken 1203 | 7,020 | 2,240 |
| SKF | SKF 1203 | 7,020 | 2,240 |
| NACHI | NACHI 1203 | 7,020 | 2,240 |
| KOYO | KOYO 1203 | 7,020 | 2,240 |
| Timken | Timken 1203 | 7,020 | 2,240 |
| FAG | FAG 1203 | 7,020 | 2,240 |
| NSK | NSK 1203 | 7,020 | 2,240 |
| SKF | SKF 1203 | 7,020 | 2,240 |
Available Variants
The NTN 1203 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the NTN 1203?
The NTN 1203 has a bore diameter of 17mm, outside diameter of 40mm, and width of 12mm. It weighs 0.056kg.
What is the load capacity of the NTN 1203?
The dynamic load rating (Cr) is 7,020 N and the static load rating (C₀r) is 2,240 N. The maximum recommended speed is 15,000 rpm with grease lubrication or 19,000 rpm with oil lubrication.
What bearings are equivalent to NTN 1203?
The 1203 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 17×40×12mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.