Hi guys, I bought from Chai 2 ballscrews, one 1900mm long and the other 1200mm long. Right out of the box, I noticed that the 1200mm ballscrew is bent about 2-2.5mm and it causes vibrations to motor and the sound when turning is not so smooth especially when the nut approaches the BK/BF supporting units that hold the ballscrew.

I know that this is bad news and probably will need to replace it with a new one, but could this problem affect the axis accuracy? During some tests with the digital gauge, I notice there is a 0.05mm loss when the axis travles from one end to the other and this loss gets bigger or smaller.

Thanks in advance.