SKF 6318-ZZ Bearing — Specifications, Dimensions & Cross-Reference
The SKF 6318-ZZ is a deep groove ball bearing double metal shielded manufactured by SKF. It belongs to the 6300 series and features dimensions of 90 × 190 × 43 mm (bore × OD × width). This bearing has a dynamic load rating of 143,000 N and a static load rating of 108,000 N, making it suitable for heavy-duty applications.
Technical Specifications
| Dimensions | |
|---|---|
| Bore Diameter (d) | 90 mm |
| Outside Diameter (D) | 190 mm |
| Width (B) | 43 mm |
| Weight | 4.490 kg |
| Performance | |
|---|---|
| Dynamic Load Rating (Cr) | 143,000 N |
| Static Load Rating (C₀r) | 108,000 N |
| Limiting Speed (Grease) | 3,400 rpm |
| Limiting Speed (Oil) | 4,000 rpm |
Brand Cross-Reference — 6318-ZZ Equivalents
The following bearings from other manufacturers are interchangeable with the SKF 6318-ZZ. All share identical dimensions (90×190×43mm) and comparable load ratings:
| Brand | Part Number | Dynamic Load (N) | Static Load (N) |
|---|---|---|---|
| SKF | SKF 6318-ZZ ✦ | 143,000 | 108,000 |
| Timken | Timken 6318-ZZ | 143,000 | 108,000 |
| SKF | SKF 6318-ZZ | 143,000 | 108,000 |
| NTN | NTN 6318-ZZ | 143,000 | 108,000 |
| NACHI | NACHI 6318-ZZ | 143,000 | 108,000 |
| KOYO | KOYO 6318-ZZ | 143,000 | 108,000 |
| FAG | FAG 6318-ZZ | 143,000 | 108,000 |
| Timken | Timken 6318-ZZ | 143,000 | 108,000 |
| NSK | NSK 6318-ZZ | 143,000 | 108,000 |
| NTN | NTN 6318-ZZ | 143,000 | 108,000 |
Available Variants
The SKF 6318 base bearing is available in these configurations:
Frequently Asked Questions
What are the dimensions of the SKF 6318-ZZ?
The SKF 6318-ZZ has a bore diameter of 90mm, outside diameter of 190mm, and width of 43mm. It weighs 4.490kg.
What is the load capacity of the SKF 6318-ZZ?
The dynamic load rating (Cr) is 143,000 N and the static load rating (C₀r) is 108,000 N. The maximum recommended speed is 3,400 rpm with grease lubrication or 4,000 rpm with oil lubrication.
What bearings are equivalent to SKF 6318-ZZ?
The 6318-ZZ is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 90×190×43mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.