How can I make hollow transparent spheres between 25 and 29 mm diameter?

bake_betty

I'm restoring an old fan that used a horseshoe-shaped steel pipe for the base, and the ends of this pipe are closed of with two caps. The caps are made of a transparent plastic, their shape reminding of a "mushroom", like this piece: This piece is hollow and inside there's another spherical cap made of polished chrome steel. So when it's fitted in the pipe you can see a transparent spherical cap and inside it the chrome spherical cap. The issue...

Originally asked by user2934303 on Stack Exchange (crafts) (CC BY-SA 4.0).

uphilltech

Great question — answering as the UphillTech team:

I think you only lacked the right search term. I found this by searching for "transparent internal pvc ball cap": It fits inside a PVC pipe, which has an inside diameter of 1-1/4". The only manufacturer I could find is Formufit. Here's their web shop ( I am in no way affiliated with this manufacturer or shop ). This seems like it could be a standardized product, designed to fit standardized PVC pipes. So maybe you could find it in different web shops or in your local home construction store. There are also dome lenses that might fit and if you're ok with the cap being metal instead of transparent plastic, you could have a look at hand rail end caps and find a lot of different designs and...

Full answer by Elmy: https://crafts.stackexchange.com/a/10838 (CC BY-SA 4.0).

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