Brandon G wrote:Very nice work!
What are you using to notch the aluminum tubing at the screw connections?
I used a type of threaded insert I found in a web shop for model trains in Germany (
http://www.knupfershop.de/shop/index.php?cp_sid=1417532438520&cp_tpl=main)
The 6mm tubing’s inner diameter is 4mm and the insert’s outer diameter and the thread is M 4,5, and it’s fine threaded 0,5. To find a M4,5 x 0,5 fine treaded tap took some time. A regular M4,5 is x 0,7mm it’s easy to find! But eventual I found it at a web shop located in Scotland (
http://www.engineeringsupplies.co.uk/metric-fine-taper-hand-carbon-steel-p-672.html) and it was relay affordable, only 4$. When I did my inquiries with my local hardware supplier, he said that he had a M4,5 x 0,7 for 45$!
I want to send thanks to the guys that invented the internet and all the search engines!
The insert I used has M2 inner thread, that I used together with M2 flat head socket 12mm long screws. The insert is also available with M2,5 and M3 inner tread. To secure this inserts ones they where screwed in to the tube, I used Loctite 243. To fit the tube and the rod together I used a 6mm round file, no milling… And for cutting the aluminum tubing and even the rod I used a simple small pip cutter!
I hope this make some sense, and answer your question Brandon.

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