Sprue Bushings - Bolt Fixing Flange Thickness 10 mm

This bolt-fixing sprue bushing is used in injection molds that require a stable sprue port interface, especially where a controlled sprue entry is needed at sprue port P3.5 layouts. Its 10 mm flange thickness and bolt-mounting style help maintain positional rigidity during clamping cycles, reducing the risk of sprue misalignment.

Common scenarios include:

• Automotive and general industrial parts: use straight tip matching to ensure consistent nozzle/sprue engagement, supporting repeatable melt feeding across production runs.
• Molds with string eliminator requirements: select the nozzle touch part specification as string eliminator to improve sprue formation control and help manage stringing tendencies.
• Multi-cavity assemblies: the rigid bolt fixing supports reliable installation in hot runner/cold runner transitions where serviceability and repeat alignment matter.

With shaft diameters of 10, 13, or 16 mm and selectable bearing bore length, this variant can be matched to tooling geometry while preserving secure mounting performance.

This sprue bushing is available in SKD61, HPM1 (equivalent), or DC53, all commonly selected for die/mold steel applications requiring a balance of wear resistance and toughness at elevated temperatures.

• SKD61: typically associated with AISI H13 class performance, offering strong hot-work capability and good toughness for long-cycle molding.
• HPM1: positioned as an equivalent to SKD61-type performance in many tooling specs, chosen when consistent machining and thermal stability are required.
• DC53: generally selected for good wear resistance with a trade-off toward slightly lower toughness than H13-class steels in some conditions.

Across these options, a common practice is quench and temper to reach the target hardness (often in the ~HRC range used for hot-work components), improving resistance to abrasion at the sprue interface. The final hardness/toughness balance depends on the selected heat treatment and desired lifetime under thermal cycling.

To select the correct sprue bushing, match the interface geometry to your sprue port and nozzle engagement design. This series provides D (shaft diameter) = 10, 13, or 16 mm and bearing bore length L = 30, 50, or 30–80 mm, so dimensioning should begin with the sprue-to-nozzle fit requirements of your mold.

• Choose D: select 10/13/16 mm based on the mating sprue bore and nozzle tip size so the straight tip matching maintains consistent engagement.
• Choose L: set the bearing bore length to suit the depth needed in the mold component while ensuring the bolt-fixed flange area remains accessible for assembly.
• Match taper angle A: use 2° or 3° or 2–3° versions based on your sprue formation control requirement and nozzle touch design.

For nozzle interface, align the nozzle touch part specification (Normal vs String eliminator) with the intended sprue control strategy. If your assembly tolerances are tight, confirm that the chosen D and L dimensions align with your machining allowances for proper seating and repeatability under clamp force.