Ball Screw Non Drive End Floating Bearing Design Variants and Help

[Halbmond]

On the video it looks like the ballscrew is not straight, rather than whipping. If this is the case then no amount of end support change will help this.

Do you have the means to check if it is straight by setting it on some V blocks and rotating it by hand and measuring with a DTI ?

Most ballscrews I have bought are bent and need straightening. You can do it yourself with a hydraulic press but best to send them away to a specialist.

It was th first thing came to my minnd when i saw it from the video. Actually I am out of city and did not check it on V blocks. But I will. It is a rolled ball screw so it will be hard to check the straighntess
on the ball screw grooves with a standard dial gage contact point (ball point). I need a flat point which will float on the rolled screw pitch grooves rather than entering inside.
Something like this.

[Halbmond]

I saw a design for angular contact bearings with a back to back arrangement for a floating bearing arrangement.
So I placed my FK30 fixed bearing to bottom without lock nut and spacer collars.
Do you think,it is possible the shaft can have a relative movement with the bearing inner ring like that ? normally floating space is given to the bearing outer ring, and it can slide inside the housing.

https://www.myodesie.com/index.php/w...ading/Bearings

[routercnc]

Not tried it but should be OK