Made from low cost parts, this rail system given the accuracy and reliability of other expensive rail systems, with parts which are available in almost any location. Budgetrail is designed to use 40mm square aluminium extrusion. The rail runs true and has very little if any backlash - something I've experienced only while putting far more lateral force than my printer will ever exert. A 4mm adjustment screw allows for fine tuning the rail to get the best balance of smooth movement with minimal backlash.

During the design of my 3D printer, I discovered regular rail systems were expensive. My printer is a 2m tall delta, and finding cheap, locally sourced T slot rails or makerslide extrusion in 2m lengths was going to be very costly. The other design consideration was fact that generally rail systems can flex - especially over a 2m length. This rail system remains rigid over 2m spans and performs incredibly reliably.

To complete this rail, you will need the following (per rail)
1x 40mm square aluminium extrusion (Im using 1.5mm wall thickness) (Costs about $50AUD for a 6m length) It is important the corners of the Aluminium Square Tube are un damaged. I used square corner tube, but experimented with radiused corners which seem to work smoother, possibly from less surface friction.
3x 55mm M8 Bolts (I printed mine)
3x M8 Nuts (I printed mine)
6x 608ZZ Skateboard bearings (high quality ABEC 5?)
9x M8 washers (I printed mine)
All parts can only be printed with the large face down. I have also included the rod arm joint for those who wish to use this rail in their delta printer.
1x 10mm M3 Bolt and nut
1x 40mm (approx) M3 Bot and Nut (I used threaded rod with a nut at each end).
1x M4 15mm Screw
1x 12mm x 3mm Round magnet, or M3 socket bolt for endstop. (Version photographed does not have the bed for these, however the stl files have been updated to include both hole for m3 bolt and magnet mounting position. You choose which you prefer.

Any questions, please let me know.