HX Coating Shoulder Punches

HX-coated shoulder punches are used in injection mold tooling and related forming assemblies where a consistent, low-friction punch stroke is required. They are well suited for automotive connector and terminal molds, supporting repeatable pierce-and-seat actions at the shoulder where alignment and wear directly affect cycle stability.

They also fit medical device housing and cap molds that require tight dimensional control on small features. The HX coating helps maintain smooth contact and reduces surface wear during high-volume production, which supports stable punch performance over repeated cycles.

For consumer appliance and electronics enclosure tooling, choosing different tip geometries (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle) allows designers to match the punch contact area to the parting-side or cavity-side feature. Available hardened steel options (SKH40, SKH51/M2, SKD11/D2 equivalents) provide a durable base for wear resistance across common tooling materials.

• Use the shoulder geometry to improve punch action stability at the interface.
• Apply HX coating to reduce friction and extend usable tool life.
• Select tip shape to match the required contact footprint and feature definition.

These shoulder punches are offered in high-performance tool steels aligned to common equivalents: SKH40 (powdered high-speed steel), SKH51 (M2 equivalent), and SKD11 (D2 equivalent). The choice balances wear resistance versus toughness for your target cavity/core materials and punch pressures.

• SKH51 (M2 equivalent): typically selected for strong hot hardness and wear resistance in fast, abrasive punch conditions.
• SKD11 (D2 equivalent): valued for high abrasion resistance for longer edge life, but can be less forgiving under shock loading.
• SKH40 (powdered HSS): powdered construction supports refined microstructure for consistent performance where tooling durability matters.

All variants are provided in a hardened steel condition suitable for precision punching. The HX coating further improves tribological performance by lowering friction and wear, allowing the cutting/contact surface to retain its geometry through more cycles. Because HRC is not specified in the provided data, hardness should be verified against the supplier’s heat-treatment certificate for the selected material option.

Select the shoulder punch dimensions by matching the shank diameter (D), tip dimensions (P/W/PC/WC/R), and head/tip lengths (B, L, LC) to the mating die set and required penetration/contact depth.

• Shank diameter D: available from 3 ~ 25 mm with tolerance +0.005/0, m5. Use the m5 tolerance when designing guide fits and sleeve/holder interfaces; ensure the mating bore considers the specified limit conditions.
• Tip dimensions: P = 1 ~ 18 mm, with tip width W = 1 ~ 6 mm, alteration parameters PC = 1 ~ 9 mm and WC = 1 ~ 3 mm, and corner radius R = 0.15 mm.
• Tip length B: choose from the provided length types L, S, X based on how much of the punch must engage the feature.
• Overall/head length control: choose L from the listed ranges (e.g., 50~100, 60~100, 40~100, 70~100, etc.). Full-length alteration LC = 27 ~ 47 mm and related tolerance change options LCT/LMT use the same 27 ~ 47 mm band.

Configurable parameters (tip shape, material, B type, and the listed dimension ranges) let you fine-tune contact geometry and penetration while keeping the shank fit governed by the provided D tolerance.