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Step 2 Projects: 3D Models for Kits and Spare Parts

This collection gathers 3D models that belong to the second stage of larger projects, along with STEP and CAD files and replacement parts for Step 2 products. It helps when you already have the first part of a build or need a spare piece for a mailbox, toy or camera. Most entries are made for FDM 3D printing, and some are designed to print in place. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

このコレクションの本文は英語で書かれています。検索自体はどの言語でも使えます。

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このコレクションは、Polyzonが対応サイトの検索結果をもとに作成しています。重複やプレビューのないモデルは除外し、関連性の低いものは後ろに回し、それ以外は検索結果の順に並べています。モデルの権利は各作者にあります。利用条件は各モデルのページでご確認ください。

選定基準:Polyzon編集部 · 本文の更新日:2026年10月15日


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«Step 2 Projects: 3D Models for Kits and Spare Parts»

The reference mixes several kinds of files. Some are labelled as the second stage of a longer assembly, such as a dinosaur project or a machine build, and only make sense together with the earlier stage. Others are STEP or CAD models of mechanical parts, from pulleys to tool bodies, which you can open in CAD software and adjust. A third group covers spare pieces for Step 2 brand items — mailbox doors, flags, drain fittings — and repair parts for cameras and small devices. Decorative and print-in-place items, such as shelves or magnet displays, form a separate group with no assembly at all.

When you open a model page, check how many parts the file contains and whether they are meant to be glued, screwed or snapped together. Look at the scale and dimensions, since a part copied from a larger assembly may need scaling to fit your own object. Read the material and settings the author lists, and see whether supports are needed for overhangs. Photos of real prints are the most useful signal: they show layer lines, wall thickness and how the part actually sits in its place.

To narrow the search, try the wording used by the authors themselves: stage 2, part 2, second version, or the file type, such as STEP file or CAD model. If you are looking for a spare piece, add the product name and the exact component — flag, door, lens, fitting. Related topics that often appear nearby include puzzle boxes, marble runs, vacuum forming tools and filament cleaners. Combining a build name with a stage number usually brings up the matching first part.

FAQ

よくある質問

What does "step 2" mean in these model titles?
It can mean the second stage of a multi-part build, the STEP CAD file format, or the Step 2 brand of children's products. The title and description on the model page usually make it clear which one applies.
Can I print only the second stage of a build?
Sometimes, but many of these files are parts of a set and depend on the earlier stage. Check the author's page for the other stages and for notes on how the parts join.
Which file formats appear here?
Mostly STL meshes for printing, alongside STEP and other CAD formats for parts you may want to edit. The formats available are listed on each model page.
How do I find the matching first part?
Search the build name together with the author's other models, or use terms like stage 1, part 1 or the project name alone. Related keywords such as puzzle box or marble run can also lead to the full set.

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