608 Ball Bearing

thingiverse

Here's an updated design of a bearing from Thingiverse. To enhance its durability, I added some tweaks to allow it to withstand pressing in 4.5mm BBs without sustaining any damage. A precision-cut hole of 4mm was drilled between the two races for better compatibility. Following that, I discovered I could squeeze up to eleven BBs into the design but with a very tight fit, so I had to slightly expand both inner and outer rings to get them to work properly. Its overall diameter remains at 22mm while maintaining an inner diameter of 8mm.