The first rule to printing without support is that the angles in your object need to be under 45 degrees. 3d printing kochi
Use an overhang test model to check and see if your printer is able to print these angles successfully.
So take this into consideration when making your model. According to the type of filament, the layer thickness, and the size of your extruder nozzle, you can push this to more degrees but it’s at your own risk. It will also depend on the hardware. Pushing the limits can be a problem if you want to distribute your design for others to print on their own standard printers.