Product Overview
Tungsten carbide dispensing screws are core rotary components for precision screw dispensing valves. Made of WC-Co cemented carbide, they deliver exceptional wear resistance and dimensional stability when pumping filled, abrasive adhesives. Controlled rotation achieves accurate volumetric dispensing, stable flow and outstanding repeatability. Widely matched with screw valves for semiconductor packaging, electronics assembly and new energy production.
Key Features
- Full tungsten carbide construction: High hardness and superior wear resistance, ideal for abrasive glues containing silver powder, fluorescent powder or solid fillers
- Precision helical profile: Uniform fluid delivery, minimal pulsation, consistent dot volume
- Low thermal deformation: Maintains stable geometry under continuous operation
- Mirror-finish surface: Reduce glue adhesion, easy cleaning, less residue buildup
- Customizable specs: Screw diameter, pitch, thread segment and shank shape available on request
- Compatible: Fits mainstream screw dispensing valve platforms
Technical Parameters
表格
| Item | Specification |
|---|---|
| Material | WC-Co Tungsten Carbide |
| Cobalt Content | 6%–10% |
| Hardness | HRA 91–93 |
| Density | ≈14.5 g/cm³ |
| Screw Diameter | φ2.0mm – φ12.0mm (custom micro size) |
| Helix Pitch | Custom pitch according to flow requirement |
| Total Length | 10mm – 80mm |
| Dimensional Tolerance | ±0.005mm |
| Concentricity | ≤0.01mm |
| Surface Roughness | Ra ≤ 0.2μm |
| Repeat Dispensing Accuracy | ±1% ~ ±2% |
| Applicable Fluid Viscosity | 1,000 ~ 1,000,000 cps |
Application
- Semiconductor & IC packaging: silver paste, fluorescent glue, underfill, epoxy dispensing
- Electronic assembly: solder paste, conductive adhesive, thermal grease dispensing
- Optoelectronics: LED and camera module glue application
- New energy: battery sealant and thermal conductive gel dispensing
- Precision screw valve equipment replacement spare parts
Tungsten Carbide Screw vs Stainless Steel Dispensing Screw
表格
| Item | Tungsten Carbide Dispensing Screw | Stainless Steel Dispensing Screw |
|---|---|---|
| Hardness | HRA 91–93 | HRC 30–40 |
| Wear Resistance | Excellent, long service life | Average, fast wear with filled glue |
| Dimensional Stability | Minimal wear, consistent flow | Thread wears gradually, flow drifts |
| Toughness | Brittle, avoid impact | Good toughness |
| Best For | Abrasive filled adhesive, mass high-precision dispensing | Clean low-viscosity glue, low wear scenarios |
