M2 Steel Ball Lock Ejector Punches - Light Duty

Ball-lock ejector punches are used in metric die sets where the punch must stay properly registered during blanking and ejection. Their retention ball geometry provides stable engagement with die blocks, helping prevent punch shift over repeated press cycles.

• Automotive connector and bracket blanking: light-duty punching that benefits from consistent ball-lock seating to maintain hole/pocket location and promote smooth part release.
• Appliance and sheet-metal component dies: regular ejection cycles where reduced misalignment risk supports predictable ejection stroke and stable die wear patterns.
• General-purpose medical device housing forming fixtures (metric): compact die layouts that require reliable retention and repeatability for small-format features.

This light-duty variant is suited for these use cases because it is offered in M2 steel and uses a consistent ball-lock geometry designed to support stable blanking and ejection in metric work.

This series is available in M2 or PS4. M2 corresponds to a high-speed steel commonly used for tooling that needs strong wear resistance under duty cycles; its advantage is durability at the cutting/impact interface where ejector punches contact parts and guide surfaces.

Heat treatment is typically selected to balance hardness and toughness for ejector service. For M2, the common route is quench and temper to reach high hardness, improving abrasion resistance; however, excessive hardness can reduce toughness under shock loads.

• M2: prioritize wear resistance for consistent ejection and longer punch life in light-duty metric die work.
• PS4: selected when a different balance of machinability and service toughness is preferred for the target die environment.

Choose the material based on expected abrasion vs. impact severity and the press cycle rate.

Select a ball-lock ejector punch by matching the shank diameter (D), overall length (L), and the point length (L1) to the die block layout. In this series, D ranges from 6 to 38 mm.

• Point length (L1): choose from 10–13, 10–19, 13–25, or 19–30 mm to match the required engagement depth into the mating die cavity/punch interface.
• Overall length (L): available in 63–100, 71–100, and 80–100 mm depending on the die stack-up and guide spacing.
• P / W geometry: set to the mating ball-lock and point features; P is 1.4–12 mm and W is 1.4–14 mm, with R = 0.2 mm.

Ensure tolerance stack-up: verify that the selected shank diameter fits the die guide/bore specification and that ball-lock seating provides consistent retention without binding.