JIS Standard M2 Steel One-Step Center Pins

These one-step center pins are used in injection mold assembly to maintain precise alignment between stationary and moving components. The one-step geometry provides a repeatable seating location during setup, reducing shift risk across production cycles.

• Automotive connector and insert molds: Install in JIS-style alignment zones where consistent centering helps prevent parting-line mismatch and improves cavity repeatability. The SKH51-hardened, wear-resistant performance supports long-running tool operation.
• Electronics and housings with tight concentricity: Use the stepped tip and controlled shaft diameter to guide sleeve-hole engagement, supporting stable alignment for thin-wall or high-feature count parts.
• Medical device housings and precision overmolding tools: The tight tip tolerances (e.g., A/V: ±0.005 to ±0.02) help achieve accurate positioning, which is critical for dimensional stability and downstream assembly fit.

Choose the step shape (A–E) and tip processing option to match your sleeve interface and required centering profile.

This variant is made from JIS M2 steel (SKH51), selected for hardened wear performance in centering features. SKH51 is commonly treated as an AISI M2 (high-speed steel) equivalent used where sliding contact and alignment stability are required.

• Heat treatment: Supplied as a hardened performance configuration appropriate for repeated tool cycles (exact HRC value is not provided in the supplied data).
• Hardness & wear: M2/SKH51 grades are engineered for high wear resistance; this supports stable pin/sleeve engagement under normal mold assembly friction.
• Toughness trade-off: Higher hardness improves wear resistance, but can reduce toughness compared with lower-alloy steels—making geometry and proper seating contact important.

If alternative steel options are offered for the same geometry, compare based on required wear life versus impact/toughness needs; for most alignment pins, SKH51-hardened performance prioritizes dimensional retention.

Correct sizing starts with matching the shaft diameter (D/P: 1–12 mm) to your alignment sleeve or guide hole. Then select the one-step geometry and tip processing that match the intended seating behavior.

• Shaft diameter fit: Use the specified D/P value so the pin engages the sleeve-hole interface with the intended tightness. For best repeatability, keep shaft-to-sleeve clearance within your mold design tolerance targets.
• Tip and centering accuracy: Choose A/V (tip tolerance: ±0.005, ±0.01, ±0.02) based on your centering sensitivity. Smaller tolerance (e.g., ±0.005) supports higher precision alignment.
• Length matching: Confirm overall L (70–350 mm) selection range against the required mold thickness stack. Also verify shaft diameter length F (50 mm) to ensure the engagement zone is sufficient for your sleeve depth.
• Geometry selection: Select step shape (A–E) and tip shape (No processing, B, C, G, R, T) so the step chamfers (e.g., Q 0.2) and tip dimensions (A: 0.5–2 mm, V: 0.5–2 mm) align with the mating part profile.

Tolerances are configurable via the provided tip tolerance options; other key dimensions (like F = 50 mm) are fixed per the specification.