Fanuc Screw And Barrel Assembly
Screw & Barrel Group Technical Specifications
| Component |
Material |
Main Alloy Composition |
Heat Treatment Process |
Hardness |
Key Features |
| Screw |
KTL-404 All-Hard Alloy |
W 6.2%, Mo 5.3%, V, Cr 4.2%, Co 2% |
- Quenching: 1150–1180°C- Tempering: 580–620°C (≥4 times)- Tail annealed at high temperature |
HRC 60 ± 2 |
Superior wear resistance, high strength, suitable for high-load applications |
| Screw Tip Assemblies |
KTL-404 All-Hard Alloy |
W 6.2%, Mo 5.3%, V, Cr 4.2%, Co 2% |
- Quenching: 1150–1180°C- Tempering: 580–620°C (≥4 times)- Tail annealed at high temperature |
HRC 60 ± 2 |
Excellent resistance to abrasion and pressure, extended service life |
| Barrel |
KTL-ST30 Double Alloy (Fe-Ni Base) |
Inner alloy: Fe, Ni, Cr, C, Co, B |
— |
Base: HRC 26–28Inner layer: HRC 59–61 |
- Alloy layer thickness: 1–2 mm (single side)- Low thermal expansion- High resistance to high-temperature softening |
| Flange |
Alloy Steel + Chromium Plating |
— |
- Heat treatment + electroplated chromium |
Base: HRC 30–32Cr layer: HRC 62–64 |
- Chromium thickness: 0.05–0.08 mm- Enhanced wear and corrosion resistance |
| Nozzle |
SKD61 |
— |
- Quenching: 1020–1050°C- Tempering: 550–570°C (≥2 times) |
HRC 50 ± 2 |
Excellent thermal fatigue resistance and toughness |