Runner Lock Pins Straight Edge Tip

Runner lock pins with a straight edge tip are used inside injection mold base designs to index and hold runner components (sprue/runner bushings, runner plates, and related alignment hardware) during assembly and repeat operation.

• Automotive connector and sensor housings: In high-throughput tooling where runner position consistency affects gate location and weld/flow balance, the straight edge tip geometry helps maintain repeatable alignment between the runner lock interface and the mating runner features.
• Consumer electronics and appliance molds: For multi-cavity runner systems, selecting the correct runner lock diameter and tip length supports secure seating without over-constraining, improving assembly repeatability during cavity setup changes.
• Medical device component molding: When tighter process stability is needed for part-to-part variation, the straight tip’s matching shape supports consistent runner positioning in tool qualification and production cycles.

This variant is suited because it provides a direct, straight-edge locking interface and is available in runner lock diameter options (2–8 mm) with configurable tip length and tip diameters for compatibility across common runner lock designs.

The provided product data focuses on runner lock geometry and dimensional designation (L/P/Y and L/P/Y/B variants) rather than a specific steel grade or heat-treatment condition. As a result, exact material properties (e.g., hardness in HRC, nitriding, or quench-and-temper state) cannot be stated from the input information.

In general application, runner lock pins are engineered for stable wear resistance at the locking interface and adequate toughness to resist small impacts during mold assembly. The straight edge tip geometry increases contact consistency, which can reduce localized fretting compared with more complex tip shapes.

• Material selection (not specified here): If you choose between common tool steels for alignment components, hardened & tempered conditions improve wear resistance, while lower hardness can improve toughness against assembly handling shock.
• Heat treatment (not specified here): Confirm whether the pin is pre-hardened, quenched & tempered, or surface-treated (e.g., nitrided) based on the exact MISUMI item listing or material certification for this series.

Select the runner lock pin by matching its diameter, tip geometry designation, and lengths to the mating features in the mold base and runner system.

• Runner lock diameter: Choose from the specified runner lock diameter range: 2, 3, 4, 5, 6, or 8 mm. This must match the mating runner lock bore/feature diameter in your tooling stack-up.
• Use the correct dimension designation: The product supports L/P/Y or L/P/Y/B dimension designation types. Ensure your drawing callout matches the designation type your runner lock interface uses.
• Match L (length): L is available in ranges such as 10–100 mm, 15–100 mm, and 15–150 mm depending on configuration.
• Match tip length B and tip diameters P/Y: Tip length B is available in ranges 0.8–3, 1.3–3.8, 1.5–4.5, or 2–6 mm. Tip diameters P and Y are provided in multiple ranges (P: 0.9–1.9 up to 2.1–7.9; Y: 0.8–1.8 up to 2–7.8).

For fit and alignment, use the exact diameter and tip diameter callouts from your runner lock mating part. If tolerances are tight, validate total stack-up length using the specified L and the mating contact depth implied by the tip length B option (when using L/P/Y/B).