1.2344 Material Nozzle Tips with 50-52HRC Hardness and +/-0.01mm Tolerance for Hot Runner Systems

Nozzle tips are high-wear, high-temperature components in hot runner systems that directly influence gate quality, flow stability, cycle consistency, and cosmetic performance at the injection point. Our steel nozzle tips for hot runner injection mold systems are custom precision parts manufactured to customer drawings to support stable gating, reliable sealing, and long service life under demanding production conditions.

As a custom precision mold components manufacturer, we machine nozzle tips with strict control over concentricity, sealing interfaces, surface finish, and gate geometry. Whether used for valve gate or thermal gate configurations, our nozzle tips are produced for repeatable installation and consistent molding results in multi-cavity and high-volume applications.

A hot runner nozzle tip is the end component of a hot runner nozzle that interfaces with the mold gate area. It must manage molten resin flow while maintaining tight sealing and thermal stability. Because it operates at elevated temperatures and experiences repeated cycles, the nozzle tip must be engineered for both precision and durability.

• Delivers melt into the gate with controlled flow behavior
• Maintains a reliable seal at the interface to prevent leakage or drool
• Supports stable gate appearance and dimensional repeatability
• Resists wear, corrosion, and thermal fatigue in long production runs

• Thermal gate tips (open gate) with optimized gate land geometry
• Valve gate tips with interfaces designed for valve pin alignment and sealing
• Specialized tip profiles for specific gate types or part requirements
• Replaceable tip designs for faster maintenance and reduced downtime

Steel nozzle tips are commonly produced in high-performance tool steels selected for hot runner operating conditions. Depending on resin type, temperature, and expected cycle count, heat treatment and optional surface treatments/coatings may be specified to improve wear resistance and reduce sticking at the gate.

Steel nozzle tips are used in hot runner injection mold systems, including:

• Multi-cavity hot runner molds requiring consistent gating performance
• High-volume production molds where tip wear affects scrap rate and downtime
• Molds processing abrasive or filled resins where gate wear is a concern
• Tooling programs using replaceable tips for preventive maintenance

Exact gate type and system architecture vary by project; we manufacture to your drawing and hot runner specification.

Nozzle tips require tight control at the gate area and sealing interfaces—minor deviations can cause gate defects, leakage, or unstable injection behavior.

• Precision CNC turning and milling for profiles and interfaces
• Grinding/lapping for sealing surfaces (as required)
• EDM / wire EDM for special features (project-dependent)
• Heat treatment coordination for hardness and thermal stability
• Fine finishing for gate land quality and wear zones
• Set matching for multi-cavity tip orders

• Concentricity and runout control between gate features and locating datums
• Tight tolerance control on sealing diameters and contact faces
• Gate geometry verification to maintain consistent vestige and appearance
• Surface finish management in flow and sealing areas to reduce sticking and leakage risk
• Consistency control for multi-piece orders (sampling or 100% inspection per requirement)

• Dimensional inspection report available (key features or full report)
• Material certificates and heat treatment records upon request
• Marking/traceability options for maintenance management

To quote steel nozzle tips accurately, please provide:

• 3D CAD (STEP/IGES) and 2D drawing (PDF/DWG)
• Hot runner system type and tip style (thermal gate or valve gate, if known)
• Quantity (single pieces or multi-cavity sets)
• Material requirement (or resin/temperature conditions for recommendation)
• Heat treatment / target hardness specification
• Critical tolerances (sealing interfaces, runout/concentricity, gate land dimensions)
• Surface finish requirement for sealing and flow areas
• Any coating/treatment requirement (if specified)
• Inspection/document needs (FAI, report format, sampling vs. 100% inspection)
• Lead time and packaging requirements

If you are replacing existing tips, providing the mating nozzle/interface dimensions helps ensure correct fit and sealing.