WPC-Treated Shoulder Punches - Single-Stepped

Shoulder punches with a single-stepped shank are commonly used in progressive and transfer die sets where the punch must deliver support and return forces with tight positional consistency.

• Automotive connector and terminal forming tools: the shoulder geometry provides controlled load transfer into the die, helping maintain stable alignment under repeated forming cycles. The WPC-treated surface supports smoother sliding at the die interface.
• Electronics housing and bracket dies: the compact, single-step shank mounting helps locate the punch consistently, improving repeatability when forming small features with varying tip shapes (round/rectangle/oblong).
• General-purpose metal stamping for small parts: WPC wear resistance reduces tooling surface degradation, supporting reliable punch return and longer productive life in high-cycle applications.

This variant is suited because the WPC surface treatment improves wear and sliding performance, while the single-stepped design supports consistent positioning during forming loads.

This series is offered in hardened steel equivalents, chosen to balance wear resistance and toughness based on load and cycle rate.

• SKH40 equivalent (powder high-speed steel): typically used when higher hot hardness and wear resistance are beneficial for demanding punch operation.
• SKH51 equivalent (M2): an AISI M2-class high-speed steel option, known for strong wear resistance with a toughness trade-off versus D2-class steels.
• SKD11 equivalent (D2): an AISI D2 equivalent for excellent wear resistance, often selected when longer service life on abrasive or harder work materials is required.

All variants are supplied as hardened steel options and matched with the WPC surface treatment to enhance sliding performance. The appropriate choice depends on your desired wear resistance versus toughness margin for the specific tip shape and dimensions.

Selection starts with matching the punch shank and head geometry to the die and guide system that will hold the punch during forming.

• Shank diameter (D): choose from 3–25 mm. The shank tolerance is +0.005/0, m5, so verify your die insert bore/guide requirement to achieve the intended clearance or fit.
• Tip size (P): select 1–18 mm based on the required forming feature size and die opening.
• Tip length (B): choose the appropriate category (L, S, X) for the die support length and knockout/stripping behavior.
• Overall length (L) and alterations: L is specified across multiple ranges (e.g., 50–100, 60–100, 40–100, 70–100, and 40–100 mm). Use LC (26–47 mm), LCT, and LMT (26–47 mm) to confirm the required length alteration and tolerance change constraints.

When ordering, ensure the chosen tip corner radius R = 0.15 mm (as specified) and the tip dimension alterations (PC 0.5–9 mm, WC 0.8–3 mm) align with the die profile to prevent premature wear or misalignment.