RP Coating Tapped Punches

RP coated tapped punches are used in injection mold tooling wherever threaded features must be formed reliably during cycling, including in multi-cavity inserts and replaceable machining modules.

• Automotive connector and bracket molds: Threaded bosses in housings or secondary parts benefit from the Al-Cr based RP coating’s high hardness/heat resistance, helping maintain punch geometry through repeated punching cycles.
• Appliance and consumer electronics housings: Alpha treatment improves coating adhesion to the substrate, reducing coating film degradation and supporting stable tap engagement when production runs are continuous.
• Medical device housings (low-defect assembly interfaces): The improved punch life and reduced maintenance help minimize downtime and reduce the risk of dimensional drift that can occur with less durable punch coatings.

This variant is suited to shops standardizing on tapped punch formats because the availability of defined tip shapes (A, D, E, G, R) and multiple tapped large/extra-large diameter specifications supports consistent build-up across different mold cavity designs.

This product is specified as an RP coated tapped punch system featuring an Al-Cr based coating combined with an alpha treatment of the substrate. The Al-Cr based coating is intended to provide high hardness and heat resistance, which are critical in high-cycle punching operations where localized heating and abrasive wear can reduce punch life.

The alpha treatment acts as a surface conditioning step to strengthen substrate performance and to improve coating adhesion. Better adhesion supports wear resistance by limiting coating peeling or film spallation under repeated contact loads.

• Hardness & wear: Coating hardness targets improved wear resistance and longer tool life.
• Toughness trade-off: Coated punches can trade some impact tolerance for higher wear resistance; alpha treatment helps maintain substrate support under load.
• Heat treatment state: The provided data specifies RP coating and alpha treatment; no specific steel grade, tempering, or HRC value is included in the input metadata.

Select the tapped punch size by matching the shank diameter (D), tip geometry, and length parameters to the mold toolholder and the tap feature depth requirements.

• Shank diameter: Choose D in the range 5–25 mm. Apply the stated shank diameter tolerance +0.005/0 with m5 fit guidance when mating to the punch retainer/bushing bore.
• Tip dimensions: Pick the tip shape A, D, E, G, or R, then select tip parameters using P 1.2–18 mm and tip corner R 0.15 (fixed per spec range shown). For size control, use PC 0.8–9 mm and W 1.2–6 mm with WC 0.8–3 mm as applicable to your thread detail.
• Lengths: Use L 40–70 mm for overall reach, and LC full-length alteration 27–42 mm when your tool stack or holder requires compensation.

Confirm that the selected L and LC provide adequate clearance to avoid interference during pressing while ensuring sufficient thread-forming engagement for the targeted cavity/core threaded boss.