Parametric parts generator

Free parametric parts for 3D printing

Generate common functional parts without modeling them yourself. Every part is built from a precise CAD kernel, so circles stay round and dimensions are exact. Download 3MF for Bambu Studio, PrusaSlicer and OrcaSlicer, STL for any slicer or STEP for other CAD software.

• Spur gear — true involute teeth (20° pressure angle). Gears with the same module mesh together.
• Knob — grip ridges and a D-shaped shaft hole for potentiometers and encoders.
• Hex standoff, washer / spacer and mounting plate with corner screw holes.
• Cable clip, wall hook and phone stand — designed to print flat without supports.
• Box with lid and name tag / keychain with raised text.
• Bolt and nut with real ISO metric threads (M3–M12 or any diameter and pitch), hex or socket head, chamfered thread ends and an adjustable nut clearance.
• Hinge — two flat-printing leaves with knuckles, clearance between them and a separate pin.
• Snap-fit latch — a cantilever snap hook and a matching slot block.
• Drawer organizer — a tray split into any number of columns and rows.
• Plant pot with saucer — tapered pot with a drainage hole and a saucer with spacer bumps.
• Pipe connector — straight coupler, 90° elbow or tee for a given pipe outer diameter.
• Bottle cap / jar lid — a screw cap with a coarse internal thread and a matching threaded neck ring.
• Tolerance test — holes at 0.1–0.5 mm clearance plus a test peg to find the right fit for your printer.

Generator pages for each part

Spur gear · Box with lid · Name tag / keychain · Knob · Washer / spacer · Hex standoff · Mounting plate · Cable clip · Wall hook · Phone stand · Bolt · Nut · Hinge · Snap-fit latch · Drawer organizer · Plant pot · Pipe connector · Tolerance test · Bottle cap / jar lid

FAQ

How do I make a 3D printable gear?

Choose Spur gear, enter module, teeth, thickness and bore. Two gears mesh when they share the same module; their center distance is module × (teeth₁ + teeth₂) ÷ 2.

What clearance should a printed fit have?

About 0.2–0.3 mm per side works on most FDM printers.

How do I 3D print threads?

Choose Bolt or Nut and pick a size from M3 to M12, or type any diameter and pitch. The threads use the ISO 60° profile with chamfered ends. Print bolts standing on their head and nuts flat, ideally with 0.1–0.15 mm layers — M6 and larger work best. The nut's thread clearance (0.2 mm by default) lets printed parts screw together; raise it if the fit is too tight.

What tolerance should I use?

For parts that slide or rotate, 0.2–0.3 mm per side suits most FDM printers; about 0.1 mm gives a snug press fit. Print the Tolerance test: the tightest hole the test peg slides into is the clearance to use with your printer and filament.

Can I edit the generated part?

Yes — click Open in PrintCAD to keep editing in the browser modeler.