Review on Befenybay 2020 Upgrade: X-Axis Synchronous Belt Tensioner For Creality Ender-3/Ender3 Pro/Ender3 V2/CR-10/CR-10 V2/CR-10 V3/CR-20 Pro –Straighten And Stretch For Enhanced Performance by Brian Rogers

These replaced some home-printed tensioners off Thingiverse. These are smaller and required no alterations to use. They replace all three belt x-y tensioners on the 5+, the factory ones are deficient in design, mine started bending at an angle after several months of operation. For the 5+, the 2020 version worked out of the package, short side and long side mounted. Best way to mount is to slack the belt, remove one end from the carriage hook, snake that back through the old tensioner, remove that, mount the new one, snake the belt back through the pulley and hook it back onto the carriage. Adjust the knob so the pulley is slacked off before trying to hook the belt up. When tightened, the pulley has support on both sides unlike the factory ones. I replaced the smooth pulleys with cogged ones, if you remove the pulley from the tightener, there are two shims, one on either side of the pulley, do not lose. A dab of grease will hold them to the pulley while replacing it. Eventually those tiny pulley bearings wear and go noisy, time to replace then. Don't know how long these will last, lasted 6 months to a year on my previous machine in pretty much 24/7 operation. Bearings can be replaced for cheaper than new pulleys. Supplied pulleys and bearings are standard sizes, replacements can be had on Best Buy, of varying qualities.