I’ve just ordered the Lowrider 4 kit, waiting on arrival to Australia. This is my first attempt at anything CNC related.
I’m looking for somewhere I can source the rails in Australia (Sydney preferebly), in a length at least 2.7 metres (to suit the full size build). Anyone have any suggestions?
What did you guys use?
I’m looking at either of these two at the moment.
They look to match the minimum requirements.
Or
Thanks. I was thinking it would have to be galvanised steel but wasn’t sure if that was the correct surface. I’ll probably go with the same as you. Cheers mate.
Check out my post below to save me copying it again! 
This might be the ticket.
@bitingmidge @Matthew_Hanly keep in kind the bunnings one is below the reccomended minimum thickness. It’s 1.2mm.
‘She’ll be right!’
Actually- while it “might” be OK - I can’t see the point in saving a few dollars on a key component- would be ok for the Y rail though.
In context- my original post was part of the early research into availability, I am sorry if it is misleading now!
I’m happy to take advice on my calculations, I’m a fabricator currently enrolled in a Mechanical Engineering program, and still have a lot of concepts to embed…
Calculating deflection of hollow cylinders (metal tube) given a single point load of 4 kg in a simple supported structure, ignoring the distributed load of the braces, cabling, etc.
The way I see it the Bunnings 31.8mm 1.2 wall tube will have a total max deflection of 0.39mm and the 1.8mm wall 32mm electrical conduit will have 0.27 total max deflection. I’m not sure it is something that will be noticeable in actual use??
Again, happy to take advice on the calculation!
The problem is that the strut isn’t just one tube. The entire beam would ideally be compressing the top tube and the bottom tube would be under tension (like an I beam). So the simple envelope math doesn’t work.
IMHO, the tube deflection doesn’t matter. Either one will be rigid enough to do the job, as evidenced by the amazing work that has already been done.
I definitely agree with this.
After printing all plastic components - time to make a decision on the rails.
I’ve gone with stainless steel 1.6mm wall x 31.8mm OD x 12m. Cost $A114 from Stirling’s in Bibra Lake, Western Australia.
Digital caliper reads 31.86mm for OD. 32mm test prints seem to fit nicely 
.
Looks like I’m sorted. 32mm for $25
Might have to double check but I think 1 length will do a fullsize sheet lrr 
That is all NB pipe, and so will not fit the bill unfortunately.
25NB (or DN) is 33.4mm OD not 32mm
They state 32od in the listing. I guess I can take my callipers.
Just posting here in case anyone stumbles across this thread. I went with the bunnings galvanised steel round tube I posted above. 31.8x1.2 in 3 meter lengths. It worked perfectly with the 32mm prints. Also its not too heavy, reasonably priced and you can easily cut it with a hacksaw.
I’m in the procces of aquiring parts/materials for a Primo to LR4 full sheet conversion that I plan to start in the comming school holidays. For others refference this is what I found for rail suppliers in OZ.
A 6m length of 304SS 31.75x1.6mm can be had from my local steel suplier (Edcon) for $64aud. they will cut to size if you ask ($3-4 per cut from memory). I haven’t got it yet but this is the path I will likely go.
They can also get 6.1m same size in gal for $41.
Just got off the phone to them. Turns out the Blacktown branch dosn’t stock the 304SS or the Gal but can have them next day if you order them in.
(No affiliation with Edcon just been using them for years and always found them supper helpful and well priced)
