JIS Standard M2 Steel Precision Rectangular Ejector Pins with Tip Processed

These JIS-compliant precision ejector pins are used in injection mold and die tooling where stable ejection alignment is critical. The rectangular guide geometry helps resist lateral wobble during repeated cycling, improving knockout repeatability in high-precision cavities.

• Automotive and appliance connectors: In molds for multi-part connectors and housings, the processed pin tip and rectangular body support consistent alignment, reducing risk of flash or uneven part release.
• Thin-wall electronics housings: For small, tightly guided components, selecting this M2-based pin helps maintain controlled motion under load while keeping guidance stable through the ejection stroke.
• Progressive die tooling: Rectangular ejector guidance is suited to die stations that demand reliable positioning and smooth transfer, especially when the tip geometry (0.8–3 mm) is tuned to the part contact area.

The M2 steel variant with tip processing is specifically suited for these scenarios because it balances guidance stability with wear resistance for long production runs.

This product uses JIS M2 steel with a hardened, wear-resistant condition. M2 is commonly used for cutting and high-wear tooling applications, providing a good balance of hardness and toughness for ejector components that experience repetitive sliding and contact.

• Wear resistance: Hardened M2 improves resistance to abrasion at the processed tip and guided surfaces.
• Hardness: The description specifies a quenched, hardened wear resistance state, supporting stable performance under cyclic ejection loading. (Exact HRC is not provided in the input data.)
• Toughness trade-off: Higher hardness increases wear resistance but can reduce impact tolerance if misaligned loads occur—rectangular guidance helps mitigate this.

If alternative pin steels are considered, hardened wear-focused grades typically offer better abrasion resistance than lower-alloy, but designers must verify hardness and toughness balance for the expected ejection forces.

Select dimensions by matching the ejector contact and guidance requirements of the cavity/core assembly. Start with the shaft diameter (D), available from 2–10 mm, to ensure proper clearance and fit within the guiding holes of the mold.

• Tip geometry: Choose the tip (P) from 0.8–3 mm and tip width (W) from 0.6–0.8 mm to match the part release area and avoid over-contact.
• Length (L / L dimension): Use L = 50–250 mm (or 50–300 mm depending on the configuration) and confirm the required stroke length to cover the ejection travel without bottoming.
• Reference geometry: For the rectangular positioning, use the specified chamfer/radius option (FR, Qr, WR) and respect the fixed R = 0.1–0.3 mm and variable A (0–0.3 mm), C (0.5–5 mm / 0.3–5 mm / 0.3–5 mm) and Q (0.5–3.6 mm).

For tight assembly, the description references P/W tolerance to support stable fit; verify your mold housing bore tolerance and ensure guidance alignment to prevent side loading during ejection. Tip shape can be selected via Tip Shape = 1–7.