Hiwin guide rail bearing block HGH20CA installation help

[EddyCurrent]

Vagelis,

The ground side of the rail is designed to butt up to a machined vertical face so that if the machined face is straight then the rail will also be straight. The carriages have a ground side as you explained and I used that face to measure from and to place my large T square on when I was getting everthing square.

[ba99297]

Thanks so far for your advices.
I have another issue with my profiled rails
On the rails i can recognize the following code HGR20H 301 8X-5c that i cant translate according the Hiwin guidway.
HG means HG series
R means that the rails are interchangeable( there is no master and subsidiary rail, both rails can be used the same)
20 is the thickness of the rail
H (that follows 20) must be the precision level of the rail I cant find out what the 301 8x-5c means. Does anybody have any idea?
Here the photos that i took
Thanks for your time
Vagelis

[Ger21]

Is the length 3018mm's?

[ba99297]

No this is not the real lengh
I bought the rails with the help of friend that makes woodcrafting mahines.
He import rails from Italy for his macines so he accept to make an order for me too.
He told me that his provider ( of the rails ) has lengths of hiwin rails that can cut to any dimension according his customers orders.
My rails have dimensions
1840mm
1080mm
400mm
But they all have the same laser printed logo HGR20H 301 8X-5c
So it is possible that the provider of the rails cut the rails to the dimensions that i order from a piece that initialy was 3018mm.