Bolt Head Heating Tubes
Precision Heating for Plastic Injection Molds & Hot Runner Systems
Our bolt head heating tubes are engineered for direct insertion into threaded holes of molds, dies, and hot runner manifolds. The compact bolt-head design enables rapid installation, excellent heat transfer, and precise temperature control in confined spaces. Constructed with premium MgO insulation and high-grade stainless sheaths for long service life.
Applications
• Plastic injection mold heating
• Hot runner manifold systems
• Die casting mold temperature control
• Rubber compression molds
• 3D printing heated beds• Laboratory & test equipment
All bolt head heaters are manufactured under IATF 16949 and carry CE marking and RoHS compliance.
CE & UL Certified
All heating elements carry CE marking (EU) and UL certification (North America). RoHS and REACH compliant materials standard.
Custom Engineering
OEM/ODM welcome. Custom voltage, wattage, dimensions, and connector configurations. Drawings and samples reviewed within 24 hours.
IATF 16949 Quality
Automotive-grade quality management. Every product undergoes 100% electrical testing before shipment.
EU Warehouse Support
Stock available in our Netherlands warehouse for fast delivery across Europe. Local technical support in English.
Technical Specifications
| Property | Standard Range |
|---|---|
| Sheath Material | SS304 / SS316 |
| Insulation | High-purity MgO |
| Max Watt Density | Up to 20 W/cm² |
| Max Operating Temp | Up to 600°C |
| Thread Size | M6 / M8 / M10 / M12 / M14 |
| Heated Length | 30mm – 300mm |
| Voltage | 12V – 480V |
| Power Range | 50W – 1000W |
| Termination | Leads / terminal pins |
| Certifications | CE, RoHS |
Application Examples
• Plastic injection mold nozzle heating
• Hot runner manifold temperature control
• Die casting mold inserts
• Rubber compression mold heating
• 3D printer heated bed elements
• Laboratory hot plates• Packaging sealing jaws
• Automotive mold heating
Custom Bolt Heater?
Provide your bolt size, voltage, and application. We'll deliver a fast, precise quote.
Thermal Bolt Tightening for Critical Joints?
Send us the bolt size, material, site voltage and required elongation or temperature. We will size the correct slip-on or clamp-on heating tube for the job.
Frequently Asked Questions
What is the MOQ for bolt head heating tubes?+
These are project tools, so orders of one or a few units — for maintenance, shutdowns or equipment trials — are normal. Volume sets for construction or fleet use are quoted by quantity; any minimum for custom sizes depends on specifications.
Can the heaters be made for specific bolt sizes and voltages?+
Yes. Standard designs cover M12 to M64 bolts, and larger sizes can be made on request. Voltage (220V/230V/380V or custom) and wattage are matched to the bolt size and target expansion, with slip-on or clamp-on mounting and heat-resistant silicone power cords.
Can temperature be measured during heating?+
Yes — heaters can be supplied with an integrated K-type or J-type thermocouple option, so the process can be monitored and logged with your controller for repeatable results.
What information do you need to size a heater?+
Bolt size and thread, bolt material/grade, flange thickness, target elongation or temperature, ambient conditions, on-site voltage, and how many bolts are heated at the same time. Photos or the assembly drawing help us confirm fit.
How fast do they heat up and how are they delivered?+
The design gives quick, typical heat-up within a couple of minutes depending on specifications. Standard configurations can be served from our warehouses in Germany and the Netherlands; custom sets are produced to order with lead time confirmed on the proforma invoice.
What certifications apply?+
Bolt head heating tubes are CE marked and RoHS compliant and are built under IATF 16949 quality controls. If a UL-marked build is required, let us know the destination market and we will confirm feasibility.
What about payment and warranty?+
Standard terms are T/T, 30% deposit and 70% before shipment. Tubes are warranted against manufacturing defects; mechanical damage, overheating beyond design limits and improper handling are not covered.
Selection Guide
| Typical Application | Key Considerations | Recommended Selection Direction |
|---|---|---|
| Wind turbine blade pitch bolts | Portability up-tower, repeatable elongation, temperature logging | Lightweight clamp-on heater matched to the bolt size, with K/J thermocouple option |
| Power-plant turbine & vessel flanges | Large bolt sizes, three-phase site supply, multiple bolts in sequence | High-wattage heater set at site voltage (e.g. 380/400V), sized from the bolt and flange data |
| Petrochemical pipeline flanges | Controlled heating replaces open flame, site safety rules | Uniform clamp-on heater set; state site safety requirements at RFQ |
| Heavy machinery assembly & disassembly | Confined spaces, fast heat-up, handling | Portable slip-on heater with heat-resistant cord |
| Structural steel, bridge & rail joints | Outdoor weather, mechanical durability | Clamp-on build with robust lead protection; wattage matched to bolt grade |
| Loosening corroded or seized joints | Even expansion without local overheating | Bolt-size-matched heater used with temperature monitoring rather than torch heating |