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Is Manual Corner Trimming Slowing Down Your Fabrication Line?
Many sheet metal fabricators still manually punch every corner before a pan, tray, or box can be folded and welded. That extra step adds cycle time, extra handling, and extra labor cost — and worn hand tools on top of that mean inconsistent notches and unplanned rework. Punch Tools' Corner Notcher removes the manual trimming step entirely and cuts that cost out of your process.
High-Efficiency Sheet Metal Fabrication Tooling Solutions
Notch Corners Faster with Punch Tools' Corner Notcher
Demonstration: the Corner Notcher cutting clean, burr-free notches for compound bends.
The Punch Tools Corner Notcher is a spring-loaded punch that removes material from a sheet's corner in a single press stroke, leaving flaps along each edge that fold up cleanly into trays, pans, and boxes. Instead of hand-trimming and deburring each corner separately, the tool completes the cut in one motion — cutting a full processing step out of your workflow.
Shapes are selected by simply rotating the die, so cabinets, drawers, and custom enclosures can all run through the same tool. Every unit is made to order and mounts to a Porta Press, press brake, or ironworker without requiring a dedicated machine.
| Feature | Capability & Benefit |
|---|---|
| Material Capacity | Aluminum up to 0.125" (1/8"), ACM panels up to 6 mm, mild steel up to 0.075" |
| Operation Style | Spring-loaded punch notches the corner in a single press cycle |
| Press Compatibility | Porta Press, press brake, or ironworker — 2 to 5 tons minimum |
| Die Versatility | Rotate the die to switch notch shapes; custom and DOT radii made to order |
Corner Notcher in Detail
Two Corner Notcher configurations, plus an illustration of how the notch allows the corner to fold cleanly.
Why Fabricators Choose the Corner Notcher
Good tooling pays for itself in fewer steps, less downtime, and more consistent parts. Whether you're running short batches or high-volume production, this tool is built to hold up to daily single-operator use.
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Fewer production steps — notching happens in one press cycle, so hand-trimming and deburring come off your floor entirely.
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No "Armstrong" labor — the press handles the heavy lifting, eliminating physical strain on the operator.
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Consistent, burr-free corners — clean notches run after run, with proper fit-up for tight bends every time.
More Corner Notcher Demonstrations
- Corner Notch Compound Bends (Seagull)
- Corner Notch Compound Bends (Stork)
- Corner Notch (Guppy Mouth)
- Corner Notch (Castle)
Frequently Asked Questions
How does the Corner Notcher improve fabrication times?
It removes material from the corner in a single press stroke, so the separate hand-trimming and deburring steps are removed from the process completely.
What material thicknesses can the Corner Notcher handle?
It's built to handle aluminum up to 0.125" (1/8"), ACM panels up to 6 mm, and mild steel up to 0.075".
Can I get custom notch shapes or sizes?
Yes. Every Corner Notcher is made to order, and optional shaped notches — including DOT or custom radii — can be added per specification.
