Dayton Ball Lock Pilot Punches - Round Tip, Heavy Duty, Inch

These heavy-duty ball lock pilot punches are used to provide repeatable part-to-die alignment in inch-based press tooling, especially where multiple stations increase cumulative positioning error.

In automotive connector and terminal stamping/blanking applications, the ball lock locating feature helps maintain consistent alignment through repeated punch cycles, supporting stable strip and cavity registration. The round tip geometry supports controlled entry and accurate locating at the start of the stroke, which is critical when dies experience wear over time.

For progressive die builds, the available shank diameter range and multiple coded length options allow engineers to match pilot location requirements across complex die carriers. Using M2 steel improves wear resistance for higher duty cycles while supporting reliable positioning across station-to-station transfer.

• Stabilizes locating performance in progressive stamping where registration drift matters
• Round tip supports controlled starting and consistent pilot engagement
• Ball lock design maintains alignment during repeated punching

The listed variants use M2 steel (also offered as PS4), selected for high wear resistance in pilot and tooling components. In general, M2 steel corresponds to the AISI M2 class (commonly referenced as a high-speed steel family) and is typically produced and supplied in a hardened condition suitable for cutting and wear-heavy service.

• M2: high hardness and strong wear resistance; improved life for repeated pilot impacts and rubbing at the guide interface.
• PS4: an alternative material option within the same product family; selected when specific hardness/toughness needs or supplier availability drive the selection.

In practice, the trade-off in hardened tool steels is that increasing hardness improves wear resistance but can reduce toughness if impact loads are high. Therefore, engineers should align the material choice with the expected pilot shock level and press duty cycle.

Hardness target: the exact HRC for the supplied variant is not stated in the provided data; confirm with incoming inspection or the material certificate for the specific order.

Select the pilot punch by matching shank diameter (D), point length B (or equivalent coded length), and the overall L/length code to the mating guide bushing or wear plate geometry in the die.

• D (shank dia.): choose within 37 ~ 125 in per the available range for the station’s locating stack.
• Point/length codes: available options include 250 ～ 600, 250 ～ 700, 275 ～ 700, and 300 ～ 700 (coded inch). Use the code that matches the required engagement depth in the die pocket.

Also verify P dimension in the range of 0.061 ~ 0.999, as this dimension affects the pilot’s functional fit/centering behavior. If the die requires specific clearance or preload, use the coded geometry consistently across both mating pilot and bushing components. Tolerance/fit values are not provided in the input data; confirm required working clearances during die tryout and pin/bushing matching.

Most dimensions here are variant-configured (via the coded length and D selection), so avoid mixing codes that alter effective pilot engagement.