Inch Heavy Load Ejector Punch Blanks

These inch heavy-load ejector punch blanks are used during the fabrication of ejector punches for punch-and-die sets where repeatability and strength are critical. In a typical build, the blank’s geometry provides a stable base for machining and finishing the working point, helping maintain consistent performance across production cycles.

For automotive connector and bracket tooling, they suit ejector assemblies that must withstand high shutoff forces and frequent actuation. The inch-coded point length options (200–500 in) allow designers to align the punch strike length with stack height and part ejection depth, reducing rework during try-out.

• Center locating-dowel applications: The blank is optimized for workflows that use center locating-dowel hole features, supporting precise alignment through the die set.
• Heavy-duty molding/forming: The blank form factor supports robust punch fabrication intended for demanding industrial runs.
• Flexible shaft sizing: Shank diameter range (37–100 in) enables matching to available guide and support components.

The provided data does not specify a particular steel grade, hardness (HRC), heat treatment, or coatings for this blank. As a result, material properties (e.g., wear resistance vs. toughness trade-offs) must be confirmed from the manufacturer’s material certificate or dimensional/processing datasheet for the exact lot and configuration.

From a manufacturing-process perspective, ejector punch blanks are typically turned and milled to create the ejector point and to fit locating-dowel and guide interfaces. The finished performance depends strongly on the final state (for example, quenched and tempered for toughness or nitrided for surface wear resistance), followed by straightening/finish machining.

• Confirm steel grade (e.g., tool steels such as H13/P20 variants or equivalent) before selecting heat treatment.
• Verify target hardness (HRC) for your wear and impact requirements.
• Align heat-treatment state with machining allowances and final size tolerances.

Select dimensions by matching the blank shank and coded point length to your ejector punch geometry requirements in the die set. The shank diameter D is specified as 37–100 in, so choose a diameter that fits your guide/bores and supports concentric motion.

For the working geometry, use the coded inch point length options: L1 & L = 200–500 in (available across the A, B, and C point-length coded variants). Match this coded point length to the required protrusion and ejection travel dictated by part thickness and the distance from die face to ejector contact.

• Core/cavity stack-up: Account for strip clearances and the die set’s shut height when setting L1/L.
• Fit & tolerance: Ensure the shank diameter provides the intended clearance/interference fit with guides and any locating-dowel interfaces used in your center-locating workflow.
• Configurable vs fixed: D is selectable within 37–100 in; point length is fixed to the coded 200–500 in range.