My try at replicating a gear from Zepter's Vacsy old vacuum pump. It works, although the tolerances are quite tight and although a pump is working correctly, it works quite noisy.
I printed it both in PETG and HD PLA (visible in the photos). The one printed in PETG is working fine (although quite noisy, like I mentioned) for almost a year now of regular use.
When replacing and original part, use some lube to make everything work smoother.
OnShape link to my design: https://cad.onshape.com/documents/45ee80c9b6c88f0bead403d3/w/bfa558507e772cd1acd81c9f
The author marked this model as their own original creation.