Runner Lock Pins Tapered Shaft Hard Lock Tip

Runner lock pins with a tapered shaft and hard lock tip are used in injection mold runner systems to keep the runner components in precise alignment under cyclic press loads. They are typically installed to locate and retain sprue/runner inserts or gate-related runner elements so that mating features repeatedly seat to the same position.

• Automotive connector and housing molds: Use the tapered lock geometry (5–10° taper) to resist micro-movement during high-cycle operation; the hardened contact zone helps maintain stable engagement at the lock tip.
• Electronics and appliance part molding: Select the appropriate runner lock diameter (4, 5, 6, 8, or 10 mm) to match cavity/core interface sizing and maintain consistent runner pitch and gate alignment.
• Medical device housings: Hardened lock-tip wear resistance supports long service life where precise repeatability is needed across many production runs.

The available data specifies a hardened locking tip intended to resist wear at the contact zone where the tapered tip engages its mating lock feature. This design improves reliability by sustaining consistent contact geometry over repeated mold cycles.

• Heat treatment state: Hard lock tip is explicitly described as hardened; no additional bulk grade, quench & temper, or nitriding details are provided in the supplied specifications.
• Property trade-off: Hardening at the tip increases wear resistance and reduces galling during repeated engagement, while the tapered shaft geometry supports positional stability.
• Material comparison: Only the hardened-tip concept is confirmed; no alternative material grades are listed in the input, so comparative statements (e.g., SKD61 vs. SKH51) are not supported.

For hardness (HRC) and exact steel grade selection, confirm the part’s material certificate for the specific size/variant.

Select the runner lock pin dimensions by matching the runner lock diameter and the tip geometry to the mating lock pocket/profile in the runner tooling. Choose the base diameter from 4, 5, 6, 8, or 10 mm, then pick the appropriate head size (Normal or Large) based on clearance and retention needs in your plate layout.

• Taper angle: Ensure the mating feature accepts a 5–10° taper; this directly affects seating depth and engagement consistency.
• Tip geometry matching: Use B (tip length) (1.8–3.8, 2.3–4.5, 3–6, 3.8–7.5), E (tip width) (0.5–1.5, 0.8–2.3, 1–3, 1.3–3.8), F (tip diameter) (1–2.5), and P/V/Y values within their provided ranges (e.g., V: 3–3.9 up to 8–9.9 mm; Y: 1–2.5 mm) to conform to the lock’s mating contact zone.
• Designation types: The dimension designation type can be L/P/Y/F or L/P/Y/F/B/E/V/G; ensure you reference the correct designation format when ordering the correct variant.

Specific tolerances/fit values are not provided, so dimension-critical mating should be validated with your drawing or supplier tolerance class.