Single-Ended Cartridge Heaters: High-Density Precision Heating
Single-Ended Cartridge Heaters: High-Density Precision Heating
| Technical Specifications | Range / Typical Values |
| Voltage Range | 12V – 440V |
| Power Density | Up to 25W/cm2 (High-wattage types) |
| Resistance Range | 1Ω – 1000Ω |
| Current Range | 0.5A – 20A |
| Diameter Range | Φ3mm – Φ25mm (Metric & Imperial) |
Extreme Power Density: Due to the swaged design, these heaters can reach watt densities of up to 200 W/in² (30 W/cm²), making them ideal for heavy-duty molds and fast-cycling machinery.
Precision Fit: Manufactured to strict diameter tolerances to ensure a “slide-fit” into bored holes. This tight fit is critical for efficient conduction and preventing element overheating.
Simplified Wiring: With both lead wires exiting one end, cable management is cleaner and easier to protect, especially in moving platens or rotating machinery.
Exceptional Durability: The internal resistance wire is positioned close to the sheath wall for rapid heat dissipation, which keeps the core temperature lower and significantly extends the service life.
| Feature | Standard Cartridge | High-Watt Density (Swaged) |
| Sheath Material | 304 Stainless Steel | 321 SS / Incoloy® 800 |
| Diameter Range | 3mm (1/8″) to 25mm (1″) | 3mm (1/8″) to 25mm (1″) |
| Max Sheath Temp | 1000°F (538°C) | Up to 1400°F (760°C) |
| Internal Sensor | Optional Type J/K TC | Optional Type J/K TC |
Plastic Processing: Heating injection molding manifolds, nozzles, and hot runner systems.
Packaging Industry: Sealing bars, hot-melt glue applicators, and labeling heads.
Medical & Lab: Sample warming, surgical instrument sterilization, and fluid analysis equipment.
Die-Casting & Tooling: Heating platens, molds, and dies in metal forming and wood laminating.
Aerospace & Defense: Anti-icing components and precision thermal control in instrumentation.
At Runkel, we don’t just manufacture heating tubes; we provide thermal solutions. Our core strength lies in our unmatched customization capabilities.
Whether you are a researcher needing 1–2 prototype samples for a new project, or a maintenance manager looking to replace a discontinued or aging heating element in your existing machinery, we deliver perfect-fit solutions with no minimum order hurdles.
“From 1 unit to 1,000—we treat every prototype with production-grade precision.”
Engineering Review: Our team verifies the power density and material compatibility for your application.
Agile Production: Your custom order enters our flexible production line immediately.
Quality Assurance: Every unit undergoes rigorous insulation and leakage current testing before shipping.