DJI bayonet mount construction kit (FreeCAD)

I like the DJI bayonet mount but not the standard action camera adapters with the bolted hinge. Besides poor availability they tend to break too easily.

I made a bayonet fastener that acts as a base to build individual and perfect fitting adapters onto. 

It features notches on the sides for maximum grip as well as a 1/4" thread to mount it on a tripod.

The dim_b spreadsheet contains almost every dimension used in the bayonet fastener model.  –  Alter these only if you encounter problems in printing. When adding new adapters (Bodys) I recommend adding seperate spreadsheets (if needed) as well to keep everything well organised.

Building individual adapters

When creating new adapters you don't have to worry about the bayonet fastener. Just build the model considering the fastener's top face as the base area to build on.

Now you can boolean both bodies in a fusion to make further alterations. Or if you're fine with the result, simply select both bodies and export them into a single .step file for the slicer.

(Alternative workflow: convert the objects to be joined into meshes in the Mesh workbench, then merge them → export .stl)

You can easily have multiple adapters in one FreeCAD project, as they use the same fastener anyway.

When creating more complex adapters it's worth considering to do this in a separate copy of the bayonet mount project file.

Printing

PETG is highly recommended. I printed with 0.4 mm nozzle, 0.2 mm layer height, at least 5 perimeters, additional top/bottom layers, support. In some prints I used modifiers to reduce weight, see .3mf files attached.

Do test prints first to check dimensions before you print complex models!