Design guide

The rules

• Draw one-to-one in millimetres

  One drawing unit equals one millimetre, at true size.

• One closed outline per part

  Every part is a single closed loop with no open ends.

• No duplicate or overlapping lines

  Double lines cut twice and burn the edge — keep one line only.

• Holes at or above the thickness

  Hole diameters below the sheet thickness may taper instead of cutting clean.

• Slots as wide as the thickness

  Narrow slots below the thickness close up or deform.

• Corner relief and inner radii above the kerf

  Sharp inside corners cannot be cut — leave a radius wider than the beam.

• Holes clear of edges and bends

  Keep holes two thicknesses plus the bend radius away from edges and bend lines.

• Add bend relief

  A small notch where the bend meets the edge stops the corner tearing.

• Respect the minimum flange

  Short legs slip off the tooling — give each bend enough leg to grip.

• Text and engraving on separate layers

  Engraving is held and quoted by hand — never mix it with cut lines.

• A stock-size border reads as the material edge

  A stock-size border drawn around your parts is read as the material edge, not as separate parts.

• Tolerances in plain words

  Parts leave the shop checked against your drawing — ask on WhatsApp when a fit is critical.

• Write it on the order

  State material, thickness, quantity, RAL colour and finish with every order.