Key Flat Shank Ejector Punches

These key flat shank ejector punches are used in precision injection mold tooling where stable punch retention and repeatable ejection are critical. The flat shank geometry supports locating stability, helping maintain alignment through cyclic operation in production molds.

• Automotive and appliance parts molds: Used for consistent ejection of thin-to-medium features; the RX or HX surface treatment is selected to improve abrasion and scuff resistance under high cycle counts.
• Electronics connector and insert molds: Their key flat shank design helps prevent rotation or walk-out, supporting accurate punch positioning for precision machining.
• Die/mold build-ups with cyclic load: When higher load handling is required, the spring-reinforced option helps maintain performance over repeated ejection cycles.

Choose RX when you want an Al-Cr system combined with nitriding treatment for wear resistance, or HX when you need robust resistance against scuffing and abrasion in demanding cavity/core environments.

This series is offered with RX or HX surface treatment configurations that are aimed at improving tool wear behavior during ejection. For RX, the specification states Al-Cr + nitriding treatment; this nitriding step supports harder surface performance to resist abrasion and scuffing.

• RX coating: Al-Cr coating with nitriding for enhanced wear resistance under repetitive sliding and contact.
• HX coating: A dedicated coating option focused on abrasion and scuff resistance for stable ejection performance.

Hardness (HRC) and specific steel grade are not provided in the given specifications, so they should be confirmed for your exact configuration. In general, coating-driven solutions improve surface durability while the underlying toughness remains dependent on the base steel used by the manufacturer.

Select dimensions to match the ejection system clearances and guide features in your mold cavity/core. The shank diameter D is available in 4 to 25 mm, so first choose the closest D that fits your punch bore/guide while maintaining recommended clearance for smooth motion.

• Tip shape: Select the tip form (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle) based on the part’s ejection contact area.
• Tip dimensions: Tip length B is set as L or S, while P (tip dimension) ranges 1 to 18 mm. Tip corner radius R is 0.15 mm, and tip width W ranges 1 to 6 mm.
• Overall length: The dimension L is available in multiple ranges (e.g., 50–80, 50–100, 60–100, 40–80, 40–100, 50–100 as listed), and the full-length alteration LC ranges 27–90.1 mm.

For configuration variants, confirm whether head thickness tolerance change/total length alteration (LCT) or head thickness tolerance change/full length change (LMT) applies, since these affect final stack-up and fit. Tolerance and fit must be validated against your guide bore and retention features for stable ejection.