DLC Coated Double Stepped Shoulder Punches

These double stepped shoulder punches are used inside precision die sets where stable guiding and consistent penetration are critical, especially in close-space forming. The stepped shank supports repeatable positioning so the punch tip enters the sheet or component with controlled alignment across high cycle counts.

• Automotive and appliance sheet-metal punching: Suitable for shoulder/step-cut features that require accurate depth control; the double-step geometry helps maintain coaxiality during repeated strikes.
• Electronics housings and stamped brackets: When compact tool spacing limits lateral clearance, the durable DLC (XCD) surface helps reduce friction and abrasion at the punch–material interface.
• General industrial forming operations: The DLC-coated variant is well-suited for dies running abrasive or wear-prone parts, supporting longer tool life and more consistent output geometry.

Choose the DLC (XCD) coated configuration to improve wear resistance and reduce friction without changing the core double-stepped alignment function.

Two steel options are available: SKH40 equivalent (powdered high-speed steel) and SKH51 equivalent (M2). SKH51 (M2) is typically selected for higher abrasion resistance, while SKH40 emphasizes high-speed steel wear performance with good overall toughness for tooling that sees frequent cycling.

• DLC (XCD) coating: Applied on the working surfaces to lower friction and enhance surface wear resistance during punching.
• Heat treatment state: Supplied as HSS tooling steel for cutting/punch applications; final hardness is set through manufacturer heat treatment and wear-focused finishing (exact HRC is not specified in the provided data).
• Trade-off: Higher wear resistance steels can be slightly less forgiving under shock than balanced grades; coating helps reduce both frictional heating and wear.

For aggressive abrasive operations, select the SKH51 (M2) equivalent. For balanced performance in frequent production, SKH40 equivalent is a strong fit.

Select the punch based on the shank diameter and overall length needed for cavity/core clearance and penetration depth. Start with D (shank diameter): available 3 ~ 25 mm with m5-type fit tolerance (+0.005/0)—use this when designing alignment bores and guide features.

• Overall length (L): choose from 40 ~ 80 mm or 40 ~ 100 mm depending on die stack height and how far the punch should extend.
• Working geometry: match B and head-related dimensions to the shoulder/step requirements (B ranges include 2 ~ 19, 2 ~ 25, 2 ~ 30, 2 ~ 35, 2 ~ 45, 2 ~ 60 depending on configuration).
• Length alteration parameters: use LC (30 ~ 70.1 mm), LCT and LMT (each 30 ~ 70.1 mm) to align total length variation with your punch holder and wear allowance strategy.
• Tip dimensions: pick P (0.5 ~ 9) and V (0.51 ~ 9.01) plus tip shape (Round/Rectangle/Oblong/Double Flatted Round/Radius Rectangle) to match the required punch profile.

Ensure the guide bore and holder dimensions accommodate the specified D tolerance (+0.005/0, m5) to maintain alignment under load.