Punch Holders - Cavity Insert

This cavity insert is used inside punch holder systems to support cavity punch applications where stable punch alignment directly affects forming quality and machining repeatability.

• Automotive and appliance forming: In progressive or fine-blank tooling, the insert helps maintain the punch axis for both round and shaped punches, reducing misalignment-driven wear and dimensional drift during long production runs.
• Electrical connector and terminal tooling: For shaped cavities, it provides controlled seating geometry that supports precise guidance of the punch tip, helping maintain consistent cavity fill and burr control.
• General stamping for custom shapes: When multiple punch geometries are used, the variant supports reliable location for the specified round or shaped punch type, improving setup accuracy during tool changeovers.

With its wear-focused SKD11-equivalent or SKH51-equivalent steel options and tight assembly-fit design, it is suited to environments requiring stable positioning and repeatable machining outcomes.

These punch holders/cavity inserts are offered in two hardened tool-steel options: SKD11-equivalent and SKH51-equivalent, selected to balance wear resistance and toughness for different punch duty profiles.

• SKD11-equivalent: Commonly used when strong toughness is needed alongside good wear performance; it is typically supplied in a heat-treated condition and aims for stable cutting/impact resistance under stamping loads.
• SKH51-equivalent: Designed for higher wear resistance in abrasive or long-cycle conditions; its high-speed steel family chemistry improves red-hardness and edge durability compared with standard die steels.

Hardness is chosen for tooling service (commonly in the mid-to-high HRC range after heat treatment), where increased hardness improves wear resistance but can reduce toughness. The final microstructure after heat treatment (quenched and tempered for die steels; appropriate hardening/tempering for HSS-type options) governs the wear–toughness trade-off.

Correct selection is driven by matching the insert geometry to the punch system and cavity/core requirements. Start by identifying whether your application uses a round punch or a shaped punch, then select the corresponding insert configuration.

• Punch diameter (D): Ensure your punch diameter is within 1.6 to 13 mm.
• Outer shape (V and H): Choose V in 3 to 25 mm and H in 3 to 25 mm to match the holder’s mating recess/profile.
• Length (L) and full-length alteration (LC): L is offered in ranges 7–22 mm, 11–25 mm, and 16–30 mm. Select LC from the available alternatives (e.g., 7.01–24.91 or 16.01–29.91 mm) to match depth and stack-up needs.

For reliable guidance, keep the assembly fit within the tooling’s specified tolerance scheme. Because these dimensions are product variants (not free-form), verify the exact size combination against your holder block cavity/core drawings and expected insertion clearance.