Slotted Perforated Metal

A: Indicate whether the slot length runs parallel to the length of the sheet (Side Staggered / Longitudinal) or parallel to the width (End Staggered / Transverse). Clarifying this direction prevents errors during frame assembly and material feed.

A: Round-end (oblong) slots are produced using standard punches with radiused ends, distributing structural stress evenly and preventing material buildup during screening. Square-end slots have sharp 90-degree corners, primarily used for architectural aesthetics and specific ventilation grilles.

A: For carbon steel and aluminum, the slot width should generally be equal to or greater than the sheet thickness (Slot Width >= Thickness). For stainless steel, we recommend a slot width of at least 1.2 times the sheet thickness (Slot Width >= 1.2 * Thickness) to extend punch tool life and prevent edge cracking.

A: Punching elongated slots introduces high directional tension, which can cause longitudinal bowing or edge waves. We process all punched sheets through a multi-roll precision roller leveler to restore flatness before edge shearing or packaging.

A: Yes. We supply panels with specified unpunched solid margins along all four sides, or with unpunched zones based on your CAD drawings to allow easy welding, bending, or bolt mounting.

A: Provide material type, sheet thickness, slot dimensions (Width x Length), slot layout (Staggered or Straight), slot orientation, sheet dimensions (Length x Width), solid margin dimensions, total quantity, and any post-processing requirements. CAD or PDF drawings are recommended for custom layouts.