35mm to 120 film loader jig — 3D-printed ratchet mechanism

35mm to 120 loader jig

Purpose The tool allows users to wind standard 35mm film into 120 backing paper. This enables shooting 35mm film in medium format cameras to achieve a wide-angle, panoramic effect that includes the film sprockets. Design and Materials The main body parts are 3D-printed using PLA for stiffness. Functional components like the lock/brake and shaft are printed from PETG to provide necessary flexibility and prevent cracking. The assembly is screwless, relying on friction fits and snapping mechanisms. ...

March 27, 2026 · 2 min · NordicLab
Paterson Rapid Loader jig for 35mm film — 3D-printed darkroom tool

Paterson Rapid Loader

Purpose The main purpose of this tool is to create a better way to load film onto existing Paterson reels, and also to take the first steps toward an automatic loading mechanism for a Film Development Machine project. Because I decided to work in step-by-step iterations, this is a good start — a mechanical prototype that resembles the loading mechanism planned for the final machine. Materials and Production It is preferable to print from PETG, ABS, or other materials that are less brittle and more flexible. The parts have flex points and clicking mechanisms for film holding and for paper winding in the case of the 120 jig. Both tools print in 2–3 hours without supports and are designed to be printable with most modern print technologies available on the market. ...

March 7, 2026 · 1 min · NordicLab