Greetings from Nottinghamshire

**Stressedwoodman** · 13-06-2016

Got a quote back from Fred. I have also got a quote from "transmission CNC" for the same which significantly less - anyone used them, seem to be a medium preload fit which I am not sure if that's an issue or not.

**mekanik** · 13-06-2016

Hi
Could you post a link for transmission CNC
I have been looking for Hiwin rails and do not find Fred to be the cheapest supplier. are the rails from transmission CNC etched Hiwin.
Mike

**Stressedwoodman** · 13-06-2016

Here is the link
http://www.aliexpress.com/item/HIWIN...999.263.UMYDXN

**Stressedwoodman** · 15-06-2016

No one got an opinion whether medium preload is too much or not for a medium sized CNC router.? I am finding difficult to predict what sort or resistance this would be from the data sheets. I don't want to end up needing bigger motors just to move things.

**Lee Roberts** · 16-06-2016

Originally Posted by Stressedwoodman

No one got an opinion whether medium preload is too much or not for a medium sized CNC router.? I am finding difficult to predict what sort or resistance this would be from the data sheets. I don't want to end up needing bigger motors just to move things.

Medium preload should be fine...

Higher stiffness at the expense of life span and force required...negligible for home build :).

Stiffness values http://www.automation4less.com/pdfs/hiwinaglg.pdf

.Me