Steel/Aluminium design/build, sorta smallish, cuts ali hopefully

[mart154]

profiled rails/bearings

I just realized that profiled rails might actually be in my price range. Have to think and choose.


I wander if 15mm might be too small?

Have to do some more research :)
Oh damn you! :)

[JAZZCNC]

Here's a picture of the new "PFC" to explain the "apart bit."

Tho I just realized that the number "75" should be actually 100. So many errors. Embarrassing....

So I gather that would be fine?

Apart from it looks like there's not enough room for the ballnut.? . . . Have you accounted for it.?

Or would it be any good if I leave the bottom bearings on the gantry with 150 (or 200) spacing and do the top one say 300? (just to get the cutting area that little bit bigger?

Yes I'd have the top wide because you can and it will help and have the bottom most you can spare.

I just realized that profiled rails might actually be in my price range. Have to think and choose.

Well if they are within reach then stretch to them because they are in another league to round rail. 15mm will easily handle the loads but the bearings are not always ideal due to there smaller size but they will easily do the job.

[mart154]

Am I looking for the right things?
100% genuine original HIWIN BRAND Linear Guide1lot 2pcs HGR15 L=400mm rail with 4pcs HGH15CA carriage-in Linear Guides from Industry & Business on Aliexpress.com


If so, I'll redesign everything for profile rails!

[JAZZCNC]

Am I looking for the right things?
100% genuine original HIWIN BRAND Linear Guide1lot 2pcs HGR15 L=400mm rail with 4pcs HGH15CA carriage-in Linear Guides from Industry & Business on Aliexpress.com
If so, I'll redesign everything for profile rails!

Yep those are profiled rails.
If you can find 20mm for not much more then go with those has the slightly larger height and bearing size makes things a bit easier.
Thou 15mm will be fine but you'll need to put raiser blocks between back plate and bearing to give clearance between front and rear plate for ballnut. 20mm mean you just machine a shallow channel in plates for clearance.

[Boyan Silyavski]

Yep those are profiled rails.
If you can find 20mm for not much more then go with those has the slightly larger height and bearing size makes things a bit easier.
Thou 15mm will be fine but you'll need to put raiser blocks between back plate and bearing to give clearance between front and rear plate for ballnut. 20mm mean you just machine a shallow channel in plates for clearance.

Here is a "right " place to buy everything. The guy is called Fred , here is his email. Very helpfull and good price. I bought last week from him rails and ball screws and am waiting for them. Apart from the ball screws being the cheapest around./when making big order/ he can provide you with 3 types of supported rails and carriages:
1.LG /chinese/ cheapest, the minus is that they don't have long bearings like Hiwin
2.TBI , same like Hiwin, more expensive than Chinese, have long cariages, no dedicated double lip dust seals
3.Hiwin/more expensive than the before mentioned, from EU can be bought the dust seals/

I bought all ballscrews+Hiwing long carriages and rails + shipping+ customs???, a bit cheaper than the Hiwin would cost me here in EU.

Still waiting for the rails, but some guys here bought before from him.

After his detailed offer about your specific need, you will have much clearer view about everything. If cheap is what you search, i believe going with the chinese square rails is better idea than going with round supported rails

[mart154]

I have cut a bunch of steel meanwhile. And started laying out the bed frame yesterday evening.

In other news, I have to find a new job soon, so it might put everything on hold for a little while.
And if anyone has any leads on a mechanic / fitter / fabricator line of job, I might be interested :)