Square Hole Knockout Punches

To punch a square hole, a matched square punch and die set is mounted in a hydraulic press or single-end punch machine like the SEP-120. The material is positioned, clamped, and the hydraulic ram drives the punch through the plate in a single stroke, shearing a clean square opening to the die's dimensions.

Pricing varies by tonnage, throat depth, and tooling package, and typically requires a custom quote based on your production needs. Machines like the SEP-120 120-ton single-end punch are priced ExWorks factory, excluding tax and installation. Contact our team with your specs for accurate, up-to-date pricing.

Required tonnage depends on plate thickness and hole perimeter—thicker plate and larger square holes demand higher capacity. A 120-ton unit like the SEP-120 handles square holes up to a 1-1/2" equivalent through 1" mild steel plate, covering most structural and enclosure fabrication needs.

Size depends on the punch and die set installed. Hydraulic single-end punches like the SEP-120 accept a range of square, round, and oblong tooling, allowing fabricators to produce various knockout sizes for conduit entries, switchgear panels, and structural connections within the machine's rated tonnage.

Routine maintenance includes checking and replacing hydraulic oil (up to 30 gallons of ISO Grade 32), inspecting punch and die sets for wear, verifying stripper function, and confirming electrical connections. Regular upkeep extends tool life and maintains clean, repeatable square hole punching accuracy.

Yes. Hydraulic single-end punches accept interchangeable punch and die sets, so the same machine can produce round, square, oblong, or custom-shaped holes simply by swapping tooling. This flexibility makes units like the SEP-120 practical for shops handling varied enclosure and structural fabrication work.