Straight Hinge Generator
Create flexible living hinges using straight horizontal cuts in a brick-wall offset arrangement. The simplest and most widely used pattern for bending rigid materials like plywood, MDF, or acrylic.
Material
Cut Parameters
Length of each individual cut line
Bridge width between cuts in the same row
Distance between cut rows
Appearance
No design generated
What Is a Straight Living Hinge?
A straight living hinge consists of horizontal cut lines arranged in a staggered, brick-wall offset pattern. Every other row is shifted by half the repeat distance, creating a series of interlocking bridges that allow rigid sheet materials to flex and bend.
When force is applied perpendicular to the cut direction, the small bridges between the cuts act as tiny hinges, distributing stress across hundreds of points. This transforms a rigid sheet of plywood, MDF, or acrylic into a material that can bend into curves, cylinders, or organic shapes.
The straight pattern is the most popular living hinge design because of its simplicity, reliability, and predictable bending behavior. It is the go-to choice for beginners and experienced makers alike.
Recommended Settings by Material
| Material | Cut Length | Horizontal Gap | Vertical Gap | Bend Radius |
|---|---|---|---|---|
| 3 mm Plywood | 12–15 mm | 3–4 mm | 4–5 mm | Tight (30–50 mm) |
| 6 mm Plywood | 15–20 mm | 4–6 mm | 5–8 mm | Medium (60–100 mm) |
| 3 mm MDF | 10–15 mm | 3–4 mm | 4–5 mm | Tight (25–40 mm) |
| 3 mm Acrylic | 15–20 mm | 4–5 mm | 6–8 mm | Wide (80–120 mm) |
Tips & Best Practices
Bend Direction
Straight hinges bend perpendicular to the cut lines. If your cuts run horizontally, the material bends around a horizontal axis. Rotate your design 90 degrees if you need a different bend axis.
Test Cuts First
Always cut a small test piece (50 x 50 mm) before committing to a full sheet. Material properties vary between brands and batches, and a test cut lets you fine-tune the parameters.
Kerf Matters
Laser cutters remove material (kerf). A wider kerf effectively reduces bridge width and increases flexibility. If your results are too stiff, try a slightly defocused beam or slower speed.
Grain Direction
When using plywood, orient the cuts perpendicular to the face veneer grain for the smoothest bend. Bending along the grain often results in uneven flexing or cracking.
Common Applications
Lampshades & Light Fixtures
Bend flat plywood sheets into cylindrical or conical lampshades. The straight pattern creates an even light diffusion through the cut lines.
Curved Enclosures
Create rounded covers for electronics, speakers, or decorative housings. The predictable bend radius makes straight hinges ideal for enclosures.
Flexible Joints in Boxes
Replace traditional hinges on box lids with a living hinge section. The lid and body can be cut from a single sheet with no hardware needed.
Prototyping & Model Making
Quickly prototype curved surfaces and organic shapes from flat stock. Iterate faster than with steam bending or lamination techniques.
Frequently Asked Questions
What is a straight living hinge?
A straight living hinge is a pattern of horizontal cuts arranged in a brick-wall offset layout. When cut into rigid materials like plywood or MDF, the material becomes flexible and can be bent perpendicular to the direction of the cuts. It is the simplest and most commonly used living hinge pattern.
What material thickness works best for straight living hinges?
Straight living hinges work best with materials between 3 mm and 6 mm thick. Thinner materials (3 mm) bend more easily and allow tighter radii, while thicker materials (6 mm) offer more structural strength but require wider cut spacing.
Can I use the generated files commercially?
The generated SVG and DXF files are for private use only. Selling the files or products made directly from them is not permitted. You are free to use them for personal projects, prototyping, and learning.