H-D wheel bearing packer

I made second version of the handle with knurled outer surface to help removing it after use. However, I'm struggling with the threads, since my modelling software doesn't support thread modelling, only textures. Had to use the coil function but still some cleaning-up was needed with a tap and die. Piston seals are 35x45x2 mm faucet seals from Lidl-assortment. You could also print them out of TPU, I guess. Modify the grooves if needed for using O-rings or similar seals. Could work even without seals.

Just add good quality bearing grease to the cup with spoon or grease gun. Insert the bearing to piston as shown and tighten up with the handle. Then push the whole thing to cup till grease comes out from the other end of the bearing. This treatment will make your bearings last forever!

Store in clean, sealed container so it will be ready for next time.