Inch Ejector Punches - CRN Coating

Inch ejector punches with a CRN surface coating are used in injection and press tooling where parts must be reliably stripped from cavities after each cycle. They are well-suited for progressive tooling stations and high-fidelity forming/die service because the CRN-coated punch bodies help maintain a stable contact surface under repeated metal-to-tool engagement.

• Automotive and industrial connector housings: Use these ejectors in multi-cavity progressive inserts to stabilize ejection during long production runs where abrasive wear can otherwise cause ejection drag and inconsistent part release.
• Appliance and metal forming dies: Choose the CRN variant when ejectors see frequent wiping/contact against die steel; the coating supports longer cycle life compared with uncoated punches.
• Medical device component tooling (small molded parts): Select the appropriate tip shape and point length range to match limited clearances while keeping ejection consistent across steady-state cycling.

Choose the specific tip shape option (H, J, K, L, N, O, R, V, X, Y, Z) to ensure matched engagement with the part geometry and ejection force path.

The CRN-coated punch bodies are engineered to improve wear resistance at the working surface, which is critical for ejector components exposed to repeated sliding and abrasion during ejection cycles. While the base steel grade is not specified in the provided data, the process intent is clear: a hard, wear-focused CRN layer on the shank/working area to reduce surface degradation and help maintain dimensional stability over time.

• Heat treatment state: The product specification provided does not list a specific steel grade or hardness (HRC) value; therefore hardness and exact tempering steps cannot be confirmed from the available information.
• Wear vs. toughness trade-off: CRN coatings prioritize surface hardness and abrasion resistance, which generally benefits ejection durability; however, coating performance depends on correct tip geometry and alignment to avoid edge chipping.
• Coating comparison: Compared with uncoated ejector punches, CRN variants typically reduce abrasive wear and support longer cycle life in tooling with persistent contact.

Select dimensions by matching your ejector travel, engagement length, and shank fit to the mold’s ejector system and cavity/core clearance. This series provides flexible configuration through tip shape and multiple length coding ranges.

• Shank diameter (D): Choose from 18 ~ 250 (in) to match the ejector guide bore and support requirements in your tooling design.
• Point length (B & L): Use the standard S range 150 ~ 250 (coded inch), or select alternate options depending on reach needs: 150 ~ 400, 150 ~ 600, 175 ~ 625, 200 ~ 625, 225 ~ 625, 225 ~ 650, 250 ~ 650, or 250 ~ 700 (coded inch ranges are tied to alternate groupings).
• Engagement dimensions: Confirm P (0.05 ~ 1.625) and W (0.062 ~ 0.5) as they influence contact area and ejection stability; R is specified as 0.007.

For best fit, coordinate the selected tip shape and point length with the cavity/core feature depth and any draft or undercut clearance to prevent over-penetration or side loading.