Tự chế mặt bích cho bạc đạn Goblin 695

You can buy some lightweight bearings made of plastic with glass balls.

We would like to use these bearings in our 3D printer. But the 3D printer requires flanged bearings, and they are not yet available to buy.

However, we can buy normal 695 bearings (5x13x4)  and add a flange to them.

Don't tell me this isn't a good idea, I'm doing it anyway and you can't stop me.

The plastic that the bearings are made from is Delrin / acetal / POM (it's all the same stuff).

It's hard to glue things to this material as it has an extremely low surface energy. However, there are two techniques that should work that are available to the home workshop. One is to abrade the surace, the other is to use a polyolefin primer and then bond with cyanoacrylate (CA) superglue. Using the primer is the easier option to do reliably, so that's the approach we take here.

I masked off the top 3mm of each bearing and applied primer around the exposed bottom 1mm edge, trying to keep it on the outward-facing surface. I repeated this for 3 coats of primer. I then used CA glue immediately to join the flange to the bearing.

I'm hoping that while the flanges aren't stuck on super securely, they'll be good enough that they aren't the worst part of this idea.

Print some calibration parts with different Z heights (e.g. z scale 1.1, z scale 0.9, z scale 0.8), it's most imporant that the height of the flange is around 1mm or just under.