Key Flat Shank Tapped Punches - HW Coating

Key flat shank tapped punches are used in injection mold and die tool cavities to create and maintain precision features that must repeat cleanly over long production runs. The single-stepped shank supports stable locating and consistent punch alignment, which is especially valuable in automated mold systems where pin-based alignment is undesirable.

• Automotive connector and bracket housings: When repeated punching cycles form locating holes or features in inserts, the wear-resistant HW coating helps maintain edge integrity and dimensional stability through high cycle counts.
• Appliance and consumer electronics components: Use these tapped punches to form accurately positioned recesses in metal-plastic assemblies or to machine features for in-mold operations that require reliable locating without a separate ejector pin.
• Heavy-load forming dies: The hardened high-speed steel core and durable tip geometry are suited to dies where tip wear and alignment drift directly affect part tolerances.

Choose this variant when heavy-load wear resistance and accurate, repeatable locating are required using a tapped, keyed punch layout.

This punch is built from powdered high-speed steel (SKH40 equivalent), a tool steel selected for its hot hardness and reliable cutting/punching performance under repeated loading. In service, the material’s toughness helps resist chipping at the tip while still delivering strong wear resistance for repetitive forming.

• HW coating: The HW (hard tungsten-based) surface coating increases wear resistance, reducing tip rounding and maintaining feature accuracy during frequent cycles.
• Hardness / trade-off: As with SKH40-class high-speed steels, hardness supports long tool life, while toughness helps mitigate brittle failure—however, extreme edge loading can still accelerate coating wear.
• Heat treatment state: The punch is described as hardened high-speed steel, indicating a heat-treated condition optimized for punch durability (exact HRC not provided).

If an alternative material is considered, SKH40-class HSS typically offers a balanced combination of wear resistance and toughness compared with softer tool steels, though achieving similar wear life generally depends on the coating and load profile.

To select the correct key flat shank tapped punch, match the D (shank diameter) and L (L dimension) to the punch holder pocket depth and guide/retainer requirements in the mold tool. The tip dimensions (P, W, and tip shape) determine the formed feature size, while the corner radius R = 0.15 mm defines the minimum rounding at the tip edge.

• Shank diameter D: choose from 6 ~ 25 mm based on the guide bushing and tapped interface requirements.
• Length L: select 40 ~ 70 mm to achieve the needed protrusion and clearance.
• Tip size P: pick 1.5 ~ 18 mm, and use W = 1.5 ~ 6 mm for rectangular/oblong layouts.
• Full length alteration LC: available across ranges such as 27 ~ 79.9, 27 ~ 99.9, 32 ~ 79.9, and 32 ~ 99.9 depending on the selected configuration.

Confirm alteration dimensions PC (1 ~ 9 mm) and WC (1 ~ 3 mm) so the formed geometry aligns with the cavity/core feature tolerances. Use the specified combinations only—configurations are variant-driven (not a single fixed size across all options).