Sprue Bushings - Bolt Fixing, Flange Thickness 8 mm

These bolt-fixing sprue bushings are used in injection mold tooling where the nozzle must seat consistently at the sprue interface. The 8 mm flange provides a rigid mounting surface for stable nozzle alignment during repeated clamp cycles, reducing the risk of mis-seating and flash at the sprue connection.

• Automotive connector and housing molds: Ideal for sprue-bushing systems requiring repeatable nozzle positioning; the bolt-fixed flange thickness helps maintain alignment under higher production loads.
• Consumer electronics mold sets: Supports normal nozzle touch configurations with straight or tapered tip matching, enabling reliable melt-channel continuity and consistent gate formation.
• Industrial components with varied flow-path geometry: Straight or tapered tip matching shapes accommodate different nozzle seating designs, helping maintain sealing accuracy across tooling iterations.

For these applications, the SKD61 / HPM1 equivalent steel variant is suited to maintain dimensional stability and wear resistance at the sprue region where thermal cycling and abrasion occur.

This sprue bushing series is offered in SKD61, also specified as HPM1 equivalent. SKD61 is an H-heat-checking and hot-work tool steel commonly used for mold components exposed to elevated temperatures and cyclic wear at melt-contact interfaces.

• Wear resistance vs. toughness: SKD61/HPM1 balances hardness for sprue/nozzle sealing surfaces with adequate toughness to resist chipping and edge damage during assembly.
• Heat treatment state: Typically supplied in a quenched & tempered condition for dimensional stability and improved fatigue performance under thermal cycling (exact target hardness is not stated in the provided specs).
• Tip matching performance: The steel’s hard surface response supports repeated straight and tapered tip seating without rapid wear that would degrade nozzle alignment.

If you need alternatives, compare to other hot-work steels by hardness and toughness trade-offs; however, only SKD61/HPM1 equivalent is specified for this product.

To select the correct sprue bushing, match the sprue diameter (P), tip diameter (V), and shaft diameter (D) to your nozzle seating and sprue interface design. This series supports D = 8 or 10 mm, with a bearing bore length (L) from 0 to 80 mm, so choose L based on how far the bushing must support the nozzle seating length in your mold base layout.

• Sprue inner diameter compatibility: Select P based on the applicable sprue inner diameter groups: P = 2.0 or 2.5 mm corresponds to applicable P=2・2.5, and P = 1.7 mm corresponds to applicable P=1.7.
• Tip matching shape: Choose Straight or Tapered and then select A (taper angle) = 1–4° or 1–2° as required; G is fixed as 1–10° in the provided range.
• Tolerancing/fit: Ensure your nozzle touch condition aligns with the specified SR (nozzle part) = 11 mm and the corresponding V = 2.3–7.9 mm (straight) or V = 2.3–9.9 mm (tapered).

Since the product specifies dimensional ranges (rather than fixed single values), confirm your cavity/core geometry and nozzle interface drawing so the selected combination provides stable seating without interference.