Hi, i was asked to show how I made the cooling for my cnc. There is many info there but most of it is full of Crap as actually does not work well. Sorry guys but it’s true. I have tried it. Here I tell you the design that works after many hours spend testing nozzle sizes, lengths and hoses. Basically the essence so your build is 100% successful. Enjoy!
– the brass bar body ideally is 8x8mm or bigger
– fitting holes translate seamlessly to inner bore hole.
– the 2 pneumatic fittings are m5 to 4mm OD tube
– the distance between them should be at least 2cm from center lines
– the way/bore hole/ that connects all is 2mm ID
– the brass tube is 2mmOD and 1mmID. I cramp it at the end with pliers, drill it 0.6-0.8mm, sand it flat, fine sand carefully the edge to chamfer without destroying the flat nozzle face Check correct flow with more output. This is the critical part that defines the blow pattern.
– brass tube is super glued and pushed fit at brass body. Dont overdo it as you will need to exchange tha tube sometimes for some jobs
– for hevy cutting up to 20-25mm cutter 1 tube is ok even blowing heavy chips from working surface, then better 2 tubes positioned from opposite sides
– hose is 4mm OD 2mmID PU hose from China , both air and liquid hose are the same
– quality water filter body will resist even thinners / mine is made in Italy/, a crappy Chinese one will explode if sth else than water, especially using alcohol if you see even one micro crack throw it away.
– 1x baby oil+0.1 x dish washer+ 1x water or kerosine / careful with the container, test it first without pressure and then fill it to the top, full container just breaks, does not explode/
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