Old JIS A Type Sprue Bushings - Bolt Fixing, Flange Thickness 10 mm

Sprue bushings like this bolt-fixing Old JIS A type variant are used to lock the sprue system to the nozzle interface in conventional injection mold tooling. The 10 mm flange thickness supports consistent stack-up and nozzle seating, helping maintain repeatable alignment during long production runs.

• Automotive connector and housing molds: Ideal when stable sprue-to-nozzle positioning is required to reduce misalignment-related flow disturbances. The bolt fixing style provides rigid attachment for controlled resin feed.
• Consumer electronics enclosure molds: Compatible with common Old JIS A type sprue bushing setups where straight or tapered tip matching is used to maintain a consistent sprue interface fit.
• Medical/precision parts with interface control: Select the nozzle touch part options (normal, resin pocket, or string eliminator) to tune gate/shear behavior and manage stringing at the nozzle contact region.

Choose appropriate tip matching (straight vs. tapered) and nozzle touch part specification to match the required sprue interface geometry and flow control needs.

This sprue bushing series is available in S45C, SKD61, or HPM1 (equivalent), allowing selection based on the thermal and wear demands of the molding cycle.

• S45C: A medium-carbon steel typically used in a quenched & tempered condition for balanced strength and wear resistance. It offers good toughness, but wear resistance is generally lower than higher-alloy tool steels.
• SKD61 (H13 equivalent): commonly supplied in a heat-treated tool-steel state (quenched & tempered) to improve hot hardness and toughness for durability under repeated thermal cycling.
• HPM1 (equivalent): selected where extended wear life and stable performance are needed at gate/nozzle contact regions.

Hardness note: The exact HRC for each option is not specified in the provided data, so confirm the supplied condition for your supplier’s machining tolerance and expected abrasion resistance. In practice, alloy tool steels improve wear resistance while slightly reducing toughness margin compared with S45C.

To select the correct sprue bushing, match both the shaft diameter D and the bearing bore length L to your mold’s sprue/nozzle alignment stack-up for the Old JIS A type interface.

• Shaft diameter D (mm): choose from 8, 10, 12, 13, 16, 20 to fit the mating bore or recess in the nozzle seat area.
• Bearing bore length L (mm): ranges depend on the selected D, including 0–120, 0–150, 0–200, 0–80, or 0–150 (as listed per configuration). Select L so the bushing fully supports the bearing region without over-penetration.
• Sprue diameter P (mm): choose from 2–5, 2.5–5, or 2–3.5 to align with your sprue/gate opening requirement.
• Tip geometry: pick Tip matching shape (Straight or Tapered) and confirm V (tip diameter) (mm) and taper angles A (1–4° or 1–3°) / G (1–10°).

Tolerance/fit: Ensure your nozzle contact spec (Normal, Resin pocket, or String eliminator) and the selected tip diameter range (V) match the corresponding nozzle touch part geometry to maintain a stable seal and prevent resin flashing or air entrapment.