Hiwin bearings + rails set unused

[wiatroda]

ZO = Light Preload
ZA = Medium Preload
ZB = Heavy Preload

That's exactly what I ordered- ZA Medium preload. It suppose to be used for rigid vertical CNC mill. Does the code on bearing confirms preload??

[dave.w]

That's exactly what I ordered- ZA Medium preload. It suppose to be used for rigid vertical CNC mill. Does the code on bearing confirms preload??

I am on the point of purchasing identical items so am interested, how can I get in touch to discuss and perhaps collect Dave

[iak65]

Hi again, here is what I found out.

To determine the preload of the HIWIN HGH20CA slide, just put the slide on the rail and hold the rail vertically. If the slide moves under its own weight the preload is Z0.
If not it is ZA. ZB is available for bigger slides only.
If you still have the packaging you can also find the preload value there (like on the picture) :
The C at the end is the precision value according to the HIWIN catalogue and determines the price of the slide.
ZA is good preload for a precise and stiff XY table on a CNC.
Are the items sold yet?

Cheers.