Coil spring
Printable helical compression spring — usable in TPU, a prototype-only part in PLA.
Loading viewer…
Dimensions
2 mm
20 mm
40 mm
8
No account, no credit. Want it in 3MF or STEP, or a shape that isn't here? Describe it instead.
What you can change
- Wire diameter
- 0.8–6 mm · default 2 mm
- Coil diameter
- 8–80 mm · default 20 mm
- Free length
- 10–150 mm · default 40 mm
- Turns
- 3–30 · default 8
This part is generated from a hand-written, print-tested OpenSCAD module — the same numbers always produce the same geometry. It is not an AI guess, and it does not cost a credit. Before a load-bearing or fit-critical print, check it against our design guide for wall thickness, overhangs and orientation.
Print notes for this part
- PLA and PETG have essentially no spring-back — this is fine as a prototype or a low-cycle mechanism, but for a spring that actually gets compressed repeatedly, print it in TPU or use a real steel spring.
- Print with the coil axis vertical; laid on its side the coil needs support material threaded through its own centre, which is difficult to remove cleanly.
- wire_d relative to coil_od sets how stiff it feels — thin wire on a wide coil compresses easily, thick wire on a narrow coil barely moves at all before it binds.
More guides
Free Parametric TemplatesProven starters — brackets, knobs, gears, boxes. Set the dimensions and download the STL, no account.AI STL GeneratorDescribe a part in plain words and get a validated, printable STL/3MF/STEP file.Photo to 3D Print FileTurn a photo — a portrait for a lithophane, or a broken part — into a printable file.Replace a Broken PartPhotograph a snapped bracket, clip, or gear and get a printable replacement.Image to 3D PrintSkip the Inkscape-to-CAD vector pipeline — turn a JPG or PNG into a printable file directly.AI Bracket & Mount GeneratorDescribe a custom bracket, mount, or enclosure and get a file that fits.3D Printing Without CADFor makers who already print and slice, but don't want to learn CAD for one-off parts.Fix Non-Manifold EdgesWhat non-manifold geometry is, how to repair it in Blender, and how to skip the repair step.Design for 3D Printing (DfAM)Watertight is not enough — wall thickness, overhangs, fits, and orientation for AI-generated STLs.AI Miniature GeneratorDescribe a D&D or tabletop figure and get a printable STL — no ZBrush or Blender.What Is an STL File?What STL stores, why printers use it, how it differs from OBJ/STEP, and how Formo builds one from text.Free AI 3D Generators ComparedHands-on July 2026 look at which free AI 3D tools actually let you download a printable file.