TiCN Coated Tapered Head Ejector Punches

These TiCN coated tapered-head ejector punches are used in injection mold tooling where the ejector needs stable guidance during high-cycle ejection. The tapered head and single-stepped shank help maintain alignment as loads fluctuate across repeated press cycles, improving reliability at the ejector-to-plate interface.

Common scenarios include:

• Automotive and industrial housings: for robust ejection in molds that produce parts with deep cavities or complex cores, where punch wear and dimensional drift can affect ejection consistency.
• Heavy-duty connector and bracket molds: where frequent ejection demands improved wear resistance; the TiCN surface treatment supports longer service life under abrasive and punching conditions.
• Appliance and appliance-component molds: suitable for durable die work requiring standard tip geometry for repeatable alignment during punching and ejection cycles.

This variant’s combination of SKH51-equivalent HSS and TiCN coating makes it well suited for heavy-load guidance and wear-critical ejector performance.

The punches are made from powdered high-speed steel with an SKH51 equivalent grade. SKH51 is typically considered comparable to the AISI M2 family for high-redhardness, but the powder metallurgy route improves carbide uniformity and reduces segregation.

Key performance comes from a balance of:

• Wear resistance: enhanced by the TiCN coating, which reduces surface wear during heavy punching/ejection cycles.
• Toughness trade-off: HSS offers good toughness for its hardness class, but as hardness increases, impact resistance can decrease; adequate heat treatment and coating integrity are critical.
• Hardness (HRC): not provided in the input data, so selection should be based on your shop’s standard heat-treatment target for SKH51-equivalent tooling stock.

Manufacturing typically includes hardening/tempering for HSS followed by coating application (TiCN) to improve service life in abrasive contact zones.

Select the punch based on the shank diameter (D), tip geometry, and overall L dimension to match the ejector travel and guidance requirements in the mold.

Use these available ranges:

• D (shank diameter, mm): 8, 10, 13, 16
• B (tip length): options labeled L and S
• P (tip dimension, mm): 4–7.99, 5–9.99, 6–12.99, 10–15.99
• L (overall L, mm): 50–80, 55–90, 60–80, 60–90, 65–100, 70–100

To size correctly, match D to the ejector bushing/guide bore ID and keep clearance within your standard guide-fit practice to ensure smooth movement under load. Choose L so the tapered head engages the part/core with the required stroke margin without bottoming. Select P and the B length option to fit the receiving feature geometry, ensuring consistent alignment during ejection and preventing uneven loading on the tip.