CNBTR MGN12C Mini Bearing Steel Linear Sliding Guideway Rail Block Silver for Precise Measurement Equipment

hello everybody and welcome back today I want to take a minute and talk about these super cheap rails and blocks that you can get on the Internet most of them are from China and they are really really really dirt cheap there you can get them for like eight dollars and fifty cents or less if they're on sale but unfortunately they're also rather low-quality there are three different things that you can get you can get one that is moving fine but that has slack in the block where you can really feel vibration and play between the block and the rail these can't be fixed if there's play in there you can use them for something that has a load on it and that doesn't see vibrations but that's about it they are just not usable you can get the second type which are basically okay but they're moving really really really badly it's so hard to push them it's as if they work too tight what we can do