Anybody use these rails before?

[georgeburns]

20mm 55" long rails.

I'm planning to mount them sideways. Is that okay or should they be mounted with the base flats facing the floor?

[txcowdog]

Well they sure look nice. I don't see how you could go wrong with these.

[CarveOne]

Those are fully supported rods and should work in any position. The recirculating bearings have a set screw that adjusts out any free play.

I have looked at these for possible use on my next cnc machine. I have four 24" x 25mm unsupported rods I bought from a friend and decided to keep them for some other project when I saw the ones you linked to.

CarveOne

[Shinosky]

George,
I used the vxb bearings on this build. I am fairly happy with them. I just used them on the x and y axis. I used v bearings on the z. In hindsight I wish I had used the v bearings everywhere. They are that good and they are way cheaper. I find I do get some vibration off the long x axis due to the serious cantilevered y axis bridge. The bearing cages are not quite as tight as a better grade of linear bearings. They work very well for the y axis though.

[georgeburns]

Thanks for the replies. I feel much better about my plan now.

Wish I could show what my plan was in solidworks or something so I could have it critiqued, but by the time I got it into solidworks, I would be done with the machine if I spent the time building.

I really enjoyed that vid.

[solodex2151]

Originally Posted by georgeburns Thanks for the replies. I feel much better about my plan now. Wish I could show what my plan was in solidworks or something so I could have it critiqued, but by the time I got it into solidworks, I would be done with the machine if I spent the time building. I really enjoyed that vid.

SolidWorks (well, CAD in general) takes time, especially if you add the fasteners, but the payoff is huge. You don't make costly mistakes with CAD. I have caught many clearance issues and design hurdles with CAD. You can do endless design revisions for only the cost of labor.

On the subject at hand, I was considering the VXB rails in my design. The only thing that stopped me was I was using 8020 and none of the sizes had the right mounting hole configuration for the extrusion. Then, I found Ahren's parts and decided to use them instead. For the price you can't beat them.

Nate

[Coogrrr]

check my build thread I used them in my machine and am totally happy with them.

http://www.cnczone.com/forums/showthread.php?t=29877

Coog