Parametric Box

Hardware & Fastener Requirements

This design uses standard M3 hardware for assembly.

• Screws: M3
• Nuts: M3 (hex)
• Quantity:
  • 6 × M3 screws
  • 6 × M3 nuts
• Minimum screw length: 20 mm

Screw Length Logic

• The provided 3MF file includes M3 × 20 mm screws, which corresponds to all minimum dimension values.
• If you increase screw size, longer screws will be required.

     Customization Notice

The 3MF file on MakerWorld is provided with the minimum standard dimensions for the box.

To modify dimensions or adjust parameters, click Customize to tailor the model to your specific needs.

     Dimensional Logic & Wall Thickness

• All dimensions entered represent the external (overall) size of the box
• Minimum wall thickness: 3 mm
• Wall thickness can be increased for:
  • Additional strength
  • Fine-tuning internal dimensions
• The internal cavity is plain and unobstructed (no internal ribs)

By default, internal dimensions are calculated as external dimensions minus 10 mm.

Examples

• External length 230 mm → Internal length 220 mm
• External width 80.8 mm → Internal width 70.8 mm

Internal dimensions change only when adjusting the Bottom Wall Thickness or Lid Wall Thickness parameters.

     Bottom Wall Thickness & Lid Wall Thickness Logic

• Thickness is measured from the outer surface inward
• Minimum setting (3 mm) = 3 mm wall thickness
• Increasing to 5 mm:
  • Total wall thickness becomes 5 mm
  • Only 2 mm is added inward compared to the minimum

This allows you to:

• Increase structural strength
• Adjust internal dimensions precisely
• Avoid unnecessary loss of internal space

     Bottom & Lid Base Thickness Logic

• Bottom and lid base thicknesses are fixed at 3 mm
• This maximizes usable internal volume while maintaining strength and print reliability

Internal Height Formula

Internal Height = (Bottom Height + Lid Height) − 6 mm

Example 1.. Balanced Heights

• Desired internal height: 44 mm
• Bottom height: 25 mm
• Lid height: 25 mm
• External height: 50 mm
• Internal height: 44 mm

Example 2.. Taller Bottom

• Desired internal height: 49 mm
• Bottom height: 30 mm
• Lid height: 25 mm
• External height: 55 mm
• Internal height: 49 mm

This flexibility lets you redistribute height between the bottom and lid without changing internal clearance.

     Quick Reference

• All dimensions entered are external
• Internal dimensions are automatically derived
• Wall thickness adjustments add material inward only
• Internal surfaces remain flat and unobstructed
• Fixed 3 mm base thickness preserves maximum internal space
• 6 × M3 screws + 6 × M3 nuts required
• Minimum screw length: 20 mm