Linear bearings and rails

[StevieB]

Random question, but does anyone know of a good supplier of these? Ideally cheap, but accurate (I know - they are usually mutually exclusive!) Something like this:

https://www.amazon.co.uk/VEVOR-SBR12-10 ... RYN4EWNEMZ

They seem to vary hugely in price for seemingly the same thing so I am obviously missing something. They will not need to carry huge weight, rather I was idly wondering if I could do something similar to this router table fence:

https://www.youtube.com/watch?v=DCTmrLgaGVg&t=173s

However, some of the photos I have seen suggest the bearing is not 'tight' on the rail and take their position from whatever is placed on top of them, which will affect the design somewhat and the fence will probably have to rest on the table as a consequence. I am not sure if this is the case for all bearings of this type of not?

 

[Woodster]

This type are used on many machine tools. We had a CNC mill and a CNC router that used them where I used to work.

https://www.abssac.co.uk/p/Lead+Screws/ ... +rails/10/

Nice jig in the video.

Edit: Good prices for these on eBay and some are apparently UK sellers.

 

[StevieB]

Thanks for this - yes, e-bay seems to be a good source, cheaper than RS by some margin for example

 

[Woodster]

I’m not sure how it impacts what you want to do but linear rails are more normally used in pairs.