Sintered Bearing Y-Axis Bracket / Adapter for Prusa i3 MK2(2)

thingiverse

After upgrading one of my Prusa i3 MK2s with the Full Bear Upgrade V2.0, I encountered a problem with my former favorite igus drylin bearings - **which is not an issue with the Full Bear Upgrade!** I was forced to use the hated lm8uu stock bearings, which brought back all the noise and vibrations to my printer. The trouble with the igus bearings lies in their relatively soft material. The smoothness of linear movement does not handle deformation well. As you know, I have printed brackets for igus bearing, which work pretty well. However, these brackets are substitutes for the infamous zip-tie mounting method previously used by Prusa. With the introduction of U-bolts and the upgrade to MK2s, I switched to them for my entire fleet. So I was searching for an alternative to both bearing variants and found sintered bronze bushings. The advantages related to lm8uu and drylin bushings are: - No moving parts - No extra grease needed - Stiff and sturdy bronze metal - Quiet run on smooth rods The only downside: They do not come in the same size as lm8uu or trying. While the center hole is made for 8mm shafts, the outer diameter is only 12mm compared to 15mm of other bearings. They are also a lot shorter than other bearings, measuring at 15mm compared to 24mm of others. Therefore, I designed and printed these adapters, which bump up the size to meet stock sizing and make sintered bronze bearing fit stock Y-axis bed carriage design. Furthermore, they are relatively inexpensive, and you can get them from a variety of dealers. If you want to support me, please buy them via my affiliate links provided here: - eBay Germany: https://goo.gl/W2zMZE (Recommended German seller. Took just one day for bearings to arrive - very lovely support and sound quality manufactured bearings) **Important: You can use shorter bearings than 15mm when using U-bolts to fixate adapters because pressure will lock bearings in place. However, make sure outer diameter is 12mm** Please leave me a link from where you bought yours in the comment section, so I can make it public here for everyone. Moreover, I made better use of slots found on bed carriage, where usually stock bearings are placed into them. Adapters fit nicely into these slots, instantly locking them in place and position. Theoretically, you don't even need any fixation anymore. But: Secure them anyway, like with a zip-tie or with U-bolts for sturdy operation! *** Please also take a look at my other designs, printer parts, and tools. If you like to support me and my work, please consider following me on: * Thingiverse * MartinMajewski.net * Twitter * Instagram * YouTube Sending a tip over Thingiverse is much appreciated and will provide me with coffee to stay productive. Please also consider buying your next gear via one of the affiliate links found inside my Thingiverse project pages or directly over the following links. - Amazon.de: https://amzn.to/2KNFFO1 - Amazon.co.uk: https://amzn.to/2lY9bSU - eBay Germany: https://rover.ebay.com/rover/1/707-53477-19255-0/1?mpre=https%3A%2F%2Fwww.ebay.de%2F&campid=5337986926&toolid=20008 - GearBest.com: https://www.gearbest.com?lkid=13789568