RX Coating Punches with Key Grooves

These RX-coated punches with key grooves are used in injection and press tooling where repeatable positioning and stable cutting performance are required over long production runs.

• Automotive and appliance press tooling: the key-groove geometry improves alignment during install and transfer between cycles, helping maintain consistent punch penetration under continuous use.
• Electronics housing and connector subcomponents: RX coating (Al-Cr + nitriding treatment) supports better resistance to wear and corrosion, which helps preserve edge geometry and reduce cycle-to-cycle variation.
• Precision assembly and blanking operations: available tip shapes (A, D, E, G, R) allow designers to match the cavity/core contacting features for controlled forming and cleaner part edges.

The RX surface treatment variant is particularly suited when tool life is affected by abrasive wear and process-related moisture or corrosion, and when consistent punch location from the keyed interface is critical.

This punch series is offered in powdered high-speed steel or an SKH51-equivalent hardened option, selected to balance wear resistance with toughness for precision punching.

• RX coating system: RX coating uses Al-Cr with an nitriding treatment to improve surface hardness at the contact zone, enhancing wear resistance and corrosion protection.
• SKH51-equivalent behavior: this grade is typically used in an hardened state (quenched and tempered), providing high red-hardness and cutting durability; hardness is generally specified by the supplier as a high-HRC range for hardened tools, trading some impact toughness for wear performance.
• Powdered HSS option: often emphasizes uniform carbide distribution for stable machining and grinding results; when combined with RX coating, it supports longer service life under abrasive contact.

Choose the material based on expected load peaks: SKH51-equivalent for maximum wear durability, powdered HSS for balanced machining stability.

Start sizing from the shank diameter D and overall geometry required by the punch holder and die set. This series supports D = 3 ~ 16 mm with shank diameter tolerance +0.005/0, m5, so confirm your holder bore and press-fit/clamping strategy.

• Tip contact feature: select the tip shape (A, D, E, G, R) and match tip size parameters P = 1 ~ 10 mm, plus W = 1 ~ 5 mm and R = 0.15 mm (corner radius).
• Engagement length: choose B (tip length) as L, S, or X and select L within the available ranges (e.g., 40–80, 50–80, 50–100, 60–100, 60–80 depending on configuration).
• Key groove positioning: verify T = 5.1 ~ 80 mm (or up to 5.1 ~ 100 mm in extended variants) so the keyed interface indexes correctly in the holder.

Use the provided change/tolerance figures—LC, LCT, PC, and WC—to account for length and tip dimension shifts after surface treatment and finishing.