Review on Usongshine Precision Sliding Engraving Machine by Jimmy Jefferson

Upgrade to five stars I'm pretty sure the seller didn't have the agency I was sent to I just ordered another one. The replacement looked different than the first three units. Therefore, slight variations from one module to another should be expected. This came in a blue bag with two rubber end stops to prevent the bottom bracket from slipping off unintentionally. The top of the rail looked a bit polished, which surprised me. The mechanism was so smooth and perfect that I installed it without any maintenance or verification. It continues to exceed my expectations for performance and sound. I hope everyone gets these rails but two from the first batch still work absolutely as expected. Smooth with very little drag (perhaps due to custom lubrication), no shock or vibration after a few dozen prints. The first review follows: These aren't the high-end bearings, but they perform impressively well. You can find a one to one difference as I can. Considering the price and the seller's willingness to fix things like this, I'd say this is a good choice if you're considering buying linear rails for the first time. They are good enough and I will come back for more if I find another need. The rails arrived neatly packaged and lightly lubricated with what I believe was very thin engine oil. Two of the three guides I ordered moved smoothly from the start, and after about a week the jobs on my printer seemed to be running fairly smoothly with no friction. There is no noticeable play between the carriage and the rail. No end stops are included, although clips in the bottom bracket shell hold the bearings well should you need to remove and/or clean them. Additional bearings were supplied with each rail and I found this absolutely useful when one or two made a trip to the far corners of my home. A wagon did not move well along the track. Disassembly and cleaning did not help the problematic device, which I suspect is somewhat wrong with the internal dimensions. I've tried replacing bearings with a more accurate and harder design and found the problem persists. The seller offered to send me a replacement which I will use. I will update this when I get a replacement.