Tapered Head Punches RW Coating

Tapered head punches with an RW coating are used in precision press dies where punching loads are high and tool alignment directly impacts cut quality. The tapered head mounting profile supports stable guidance in tapered holders, helping maintain consistent piercing during long production runs.

• Automotive and powertrain bracket punching: Ideal for repeated blanking operations where heavy-load contact can accelerate edge wear; the RW coating is suited to reduce wear across frequent cycles.
• Thick-gauge metal fabrication: When piercing thicker sheets or layered materials, the single-stepped shank improves seating and positioning, reducing micro-movement that can degrade hole geometry.
• Industrial electrical/terminal component dies: For small-to-medium hole patterns requiring dimensional consistency, the tapered head improves cutting stability and helps keep performance steady in continuous press tooling.

This variant’s tapered head and robust guidance geometry make it a practical choice for die designers prioritizing stable piercing and longer punch life under abrasive, high-frequency operations.

The punches are made from powdered high-speed steel with an SKH51 equivalent chemistry, typically associated with excellent red hardness and wear resistance for cutting tools. Compared with lower-alloy punch steels, SKH51-type HSS generally offers a better balance for abrasive cutting and edge retention, especially under intermittent heating during punching.

• Hardness: Suitable for cutting applications typically targeted in the high-speed range (often around the upper HRC band for HSS grades), supporting wear resistance while preserving workable toughness.
• Heat treatment: Usually provided in a hardened condition appropriate for HSS punch use (quench & temper after forging/powder consolidation), then finished for coating compatibility.
• Coating role (RW): The RW surface treatment complements the base steel by improving wear performance during repeated piercing cycles.

When choosing between HSS and alternative steels for heavy-load punching, the key trade-off is that HSS (SKH51 equivalent) prioritizes edge wear resistance, while maintaining sufficient toughness for press tooling stresses.

Select the punch geometry by matching the holder and the required cutting interface in the die design. This series uses a fixed L (L Dimension) of 60–100 mm and a fixed LC (Full length alteration) of 37–99.9 mm, so verify these values against your tapered holder depth and stack-up requirements.

• Choose shank diameter D (mm): available at 8, 10, 13, 16, 20, 25 to fit the tapered holder and ensure proper guidance.
• Set tip length B: options are L or S. Use the option that matches your required punch exposure and clearance for stripper/guide components.
• Match tip dimension P (mm): pick the P range corresponding to your cutting land/edge geometry needs (e.g., 3–7.99, 3–9.99, 6–12.99, 10–15.99, 13–19.99, 18–24.99).
• Confirm PC (tip dimension alteration): select the correction/variant from 1.5–2.99, 3–5.99, 5–9.99, 6.5–12.99, or 9–17.99 to achieve final working dimensions.

Maintain proper fit between punch shank D and the holder bore/seat to preserve alignment; the provided dimensional options are intended to be selected in combination rather than mixed across unrelated ranges.