Carbide Pin-Point Gate Bushings SR Tip Step

Pin-point gate bushings are used in injection mold tooling where controlled, repeatable gate formation is required at the part interface. This SR tip step variant is designed to create a round gate transition that supports stable sprue-to-gate flow, helping maintain consistent gate geometry over production cycles.

• Automotive and industrial connector molds: Use this bushing style to achieve a clean pin-point gate appearance and reduce flow disruption, supporting reliable fill and repeatable gate size for multi-cavity or high-cycle layouts.
• Appliance and housings (thin-to-medium wall): The SR step assists in managing flow convergence while the carbide construction helps resist wear from repeated gate forming, supporting long service life during sustained runs.
• Medical device housings and precision parts: The controlled tip features (including selectable tip shapes and dimensions) help tune the gate region for lower variability in gate remnants and consistent part ejection and finishing.

Selection is suited to applications needing controlled tip geometry and a round transition to stabilize gate formation under changing melt viscosities and cavity loading.

This product is specified as a carbide pin-point gate bushing, leveraging carbide’s high hardness and strong wear resistance at the hot, abrasive gate-forming interface. Carbide tools typically prioritize wear resistance and dimensional stability, which helps maintain the SR tip step geometry for consistent gate formation across production runs.

• Wear resistance: High hardness at the gate region reduces erosion and tip wear, supporting stable gate appearance.
• Toughness trade-off: Compared with tougher mold steels, carbide is generally less tolerant of impact or shock; avoid designs that expose the tip to sudden mechanical loads.
• Manufacturing process (typical for carbide inserts): Carbide blanks are precision-machined to the selected tip profile (SR tip step), followed by finishing/precision grinding to achieve the required tip radii and angles.

Heat treatment state is not specified in the provided data; carbide is typically supplied as a sintered and precision-ground component rather than by post-quench tempering like tool steels.

To select the correct bushing, match the outer diameter (D) and the functional tip dimensions to your gate bushing pocket and the desired pin-point gate size at the cavity.

• Outer fit: Choose D (2–8 mm) to match the gate insert/runner interface. Confirm pocket dimensions and clearance so the bushing seats without interference.
• Gate geometry: Tune P (tip diameter, 0.3–1.2 mm), V (tip diameter, 1.3–4.5 mm), R (tip radius, 0.4–8.0 mm in the provided ranges), and S (tip angle, 1–45°/50°/60° per option) to achieve the target gate size and tip curvature for stable filling.
• Tip and overall placement: Select C (tip length, 0.2–0.4/0.2–0.5/0.3–0.8/0.5–1.5 mm) and B (length excluding head/tip, 3–5, 4–6, 5–9, 5–30, 5–35 mm) to position the SR step correctly relative to the sprue-to-gate transition.
• Fixed angles: A (1–3°) and K (20–30°) are fixed; verify they align with your gate bush design intent. Tip Shape options are selectable: 1A, 2A, 3A, 4A, 5A.

Because these are parameterized variants, treat dimensions as model-specific—confirm the full set (D, B, C, L, P, R, S, V, and tip shape) for compatibility with the cavity insert and gate cutting features.