Ball Lock Pilot Punches Tapered Tip Metric CRN Coating

These tapered ball lock pilot punches are used to establish repeatable pilot alignment in light-duty punch-and-die and press tooling. The tapered ball lock tip helps guide the mating component during the initial contact phase of each stroke, which is especially helpful when vibration or slight positional variation is present.

• Automotive and general fabrication blanking: Their metric shank sizing supports compatibility with standardized assemblies while maintaining stable positioning throughout forming cycles.
• Connector and bracket manufacturing dies: Use them as pilot locating features to improve die-to-strip or die-to-locating plate alignment, reducing misfeed and local wear on the guidance interface.
• Low-to-medium volume production presswork: The CRN-coated surface is suited for applications where frequent strokes benefit from improved wear resistance and longer service intervals.

Choose this variant when you need controlled guidance from the taper and a metric format for streamlined fit across tooling builds.

The provided specification set does not include a specific steel grade, hardness (HRC), or heat-treatment state. As a result, the CRN coating and its performance role can be described without assigning a guaranteed substrate hardness value.

• CRN coating: Used to improve surface wear resistance at the pilot interface, supporting longer maintenance intervals under repeated contact cycles.
• Tapered tip geometry: Complements the coating by distributing contact during initial alignment, helping maintain stable guidance while limiting localized scuffing.
• Trade-off: In general, thicker or harder coatings can offer higher wear resistance, but system performance still depends on substrate toughness and coating adhesion—both of which require confirmation from the specific component spec sheet.

If you need hardness (e.g., HRC) or a defined equivalent grade (such as H13/AISI 420, D2/AISI D2, or similar), request the material datasheet for series code 250301828325 so the heat treatment and toughness/wear balance can be verified.

Select the pilot punch dimensions to match the die set’s pilot hole geometry and the required stroke-to-stroke alignment. Start with the shank diameter (D), then confirm the available point length (L1) and overall length (L) against your tool build height and shut height constraints.

• Shank diameter D (mm): choose from 10 ~ 38 to fit the mating guide/pilot bore used in your assembly.
• Point length L1 (mm): options include 19 ~ 72, 19 ~ 102, 25 ~ 112, or 30 ~ 112, based on how deep the pilot engagement must occur during the forming cycle.
• Overall length L (mm): available ranges include 71 ~ 110, 71 ~ 140, 71 ~ 150, or 80 ~ 150; select the smallest length that provides required engagement without bottoming.
• P dimension (mm): select 1.45 ~ 30 per your design’s geometry constraints for the ball lock/taper interface.

Because tolerance and fit requirements depend on the mating pilot bore, confirm your standard clearance/interference targets for the specific die steel and lubrication practice before finalizing the D and L1 combination.