Ejector Punches WPC Treatment Single-Stepped Tip

These WPC-treated ejector punches are used in injection mold ejection systems where stable guidance and consistent stroke-to-stroke performance are required. The single-stepped shank helps maintain alignment as the punch cycles, reducing side loading that can cause sticking or accelerated wear.

• Automotive and appliance connector molds: Suitable for multi-cavity tooling that runs at high cycle counts; WPC surface treatment supports lower friction and improved wear behavior at the ejector interface.
• Consumer electronics housings: The stepped guidance improves part release consistency, especially when ejector travel is compact (full length alteration and head thickness tolerance changes can be managed via the provided L/LC/LCT/LMT options).
• General industrial commodity parts: Choose the standard or spring reinforced ejector mounting variant (as listed) to match mounting strategy and deflection needs.

With multiple tip shapes (round, rectangle, oblong, double-flatted round, radius-rectangle) this variant can be matched to ejector contact geometry for reliable part ejection.

This series is offered in multiple steel grades for different wear/strength balances: SKH40 equivalent (powdered high-speed steel), SKH51 equivalent (M2), and SKD11 equivalent (D2). The material choice directly affects abrasion resistance and toughness during repeated punch-to-part contact.

• SKH40 (powdered HSS): Powder metallurgy typically supports fine carbide distribution for strong wear resistance in sliding contact.
• SKH51 (M2): Common high-speed steel option for a good mix of wear resistance and toughness under high cycling.
• SKD11 (D2): Higher wear resistance for harder environments, but generally a trade-off toward lower toughness compared with HSS grades.

Heat treatment state and exact hardness (HRC) are not specified in the provided data, so qualification should be based on your supplier’s hardness profile for the selected grade and the required impact/loading conditions.

Select dimensions by matching the ejector punch geometry to your mold cavity/core and the required contact area on the part. The shank diameter D is available from 4 ~ 25 mm with tolerance +0.005/0, m5; use this to size the mating guide bore for correct fit and stable guidance.

• Choose shank diameter D: Verify your ejector guide bushing/hole design can accept the m5 tolerance and the specified upper limit (+0.005 mm).
• Set tip length and overall build: Tip length options are based on B (tip length) = L, S, X. Overall length is covered by L (40 ~ 80 mm) and full-length alteration options LC (33 ~ 74 mm), plus head-thickness tolerance change options LCT and LMT (both 33 ~ 74 mm).
• Match tip geometry: Tip dimensions use P (1 ~ 18 mm), with tip corner radius R (0.15), and tip thickness/dimensions W (1 ~ 6 mm), WC (1.8 ~ 5 mm), and tip alteration PC (0.9 ~ 9 mm).

Confirm tolerances and stack-ups between punch length (L/LC/LCT/LMT) and your ejector plate setup to ensure the required stroke and clearance are achieved.