PrintMakerAI Screw-Top Container Generator

About this generator

PrintMakerAI Screw-Top Container Generator is a free browser tool that builds a round jar and a matching screw-on lid from the inside size you type in. You set the inner diameter (30 to 80 mm) and inner depth (20 to 100 mm), and the lid and threads are worked out from those two numbers. Eight more fields cover wall and floor thickness, thread pitch, thread depth, number of thread turns, lid thickness, thread clearance and how many grip flutes the lid gets.

The threads use a coarse, bottle-style profile that the page says prints without supports, and the parts are built as solid CAD geometry with CadQuery on the OpenCASCADE kernel rather than a scaled mesh. A 3D preview switches between jar and lid, and each part downloads as its own STL. If the lid is too tight on your printer, raise the clearance a little and generate again: the default is 0.3 mm and the page suggests 0.4 to 0.5 mm when it binds.

There is no login, cost or watermark. It is a side tool of PrintMakerAI, a one-person text-to-CAD service founded in April 2026, so it has little outside feedback. It suits anyone who wants a jar sized for screws, SD cards, spices or paint without modeling threads.

What you can make

• Round screw-top jars
• Threaded lids with grip flutes
• Small-parts and hardware jars
• Spice and dry goods containers

How to use PrintMakerAI Screw-Top Container Generator

1. Open the Screw-Top Container page on PrintMakerAI
2. Enter the inner diameter and depth, and change wall, thread or clearance values if needed
3. Click Regenerate with my dimensions and check the jar and lid in the 3D preview
4. Download the jar STL and the lid STL and print both open side up
5. If the lid binds, raise the clearance by 0.1 mm and generate again