Center Dowel Ejector Punches - Metric, XCN TiCN Coating

Center dowel ejector punches with TiCN (XCN) coating are used in precision injection and die tooling where controlled, repeatable ejector motion is required. The built-in locating dowel hole helps establish consistent punch-to-block alignment, reducing lateral drift during high-cycle operation.

Automotive connector and housing tooling: In molds that cycle rapidly for thin-wall components, these punches support stable ejection. The TiCN (XCN) surface improves abrasion resistance at the sliding interface, helping maintain dimensional stability over time.

Appliance and electronics enclosures: For parts requiring uniform ejector force distribution, the single-stepped shank and locating geometry promote smooth, repeatable movement in ejector systems.

Workshop repair and upgrade kits: Because the product is metric and offers a wide D (10–45 mm) and length (50–150 mm up to 80–150 mm ranges) selection, it can be matched to existing die blocks to restore alignment and wear performance.

• Use in center-ejector positions where alignment repeatability is critical
• Select variants based on tip shape and shank diameter to match cavity/core stack-up

The provided metadata specifies a TiCN (XCN) coating applied to the ejector punch surfaces for enhanced wear resistance. While the exact steel grade and heat-treatment state are not listed in the input data, coating selection indicates a focus on reducing abrasive wear during repeated punch travel and contact with tool components.

In general toolmaking practice for punches, a harder substrate supports toughness against impact, while the TiCN (XCN) coating contributes to higher surface hardness and improved tribological performance. This creates a common trade-off: the substrate must maintain enough toughness to resist edge chipping, while the coating primarily targets wear and abrasion rather than bulk strength.

• Coating benefit: abrasion-resistant surface for high-cycle ejector motion
• Selection note: if multiple coating options are available, TiCN (XCN) is typically chosen for applications sensitive to sliding wear
• Heat treatment: not specified in provided parameters—confirm substrate grade and HRC from the series documentation if required

Select the center dowel ejector punch dimensions by mapping the punch to the ejector retainer block, guide bore, and core/cavity stack-up. The key fit features in the provided specs are the shank diameter D, the tip dimensions, and the overall length ranges.

• Shank diameter (D): choose within 10–45 mm to match the guide/locating bore diameter in the tool block.
• Tip size (P / W / PC / WC): match the tip geometry to your ejector pocket or mating feature using P = 2.5–35 mm, W = 2.5–9 mm, and their alteration ranges PC = 1.25–17.5, WC = 1.25–4.5.
• Length (L): select from the available L ranges: 40–150, 50–150, 60–150, 70–150, 80–150 mm depending on tool stack height and stroke clearance.
• Full-length alteration (LC): use 25–149.9 mm (range variants depend on the chosen configuration).

Consider tolerance/fit around the m5 shank diameter tolerance mentioned in the description for secure precision fit. Verify that the chosen tip corner radius R = 0–0.15 mm matches your mating clearance requirements.