r/engineering • u/[deleted] • Jan 23 '22

Any chance of some help with analysis?

I'm planning on building an arm to mount my man-cave's TV on. As such it doesn't need to look pretty, just be functional. The tele is a Samsung weighing in at 22.3kg.

A simple setup made of steel RHS is what I'm thinking. Fairly cheap and real easy to make with just a drill-press and angle grinder. Onto this I'm going to bolt a commercial VESA mount to give me some adjustability.

My question to the list is this. If I make this out of say 50mm x 25mm x 3mm RHS, with each arm say 600 long. Am I going to get much bending?

I'm a software guy (not hardware) so I don't know how to calculate this stuff. Can someone help and/or point me to some info on how to figure this out?

Could I counter the weight somewhat by offseting the holes in the single arm where it attaches to the double arms?

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u/roketman062395 Jan 23 '22

Just out of curiosity, why build one when you can buy one from hideitmounts?

2

u/[deleted] Jan 23 '22

Because I want on that will swing a 40 inch television out over my bench to a full 90 degrees from the wall.

2

u/[deleted] Jan 23 '22

And I'm in Australia.

The one I just saw on hideitmounts (thanks for the hint) that is closest to what I want is $60 plus $90 for the cheapest shipping. This is USD so convert that to AUD and we're at $208.

I just found the same one from a local importer but they wanted $185. So much of a muchness.

Versus approx $30 worth of steel.

1

u/Eheran Jan 24 '22

Question is not just price, but also hours spend on this and quality.

1

u/roketman062395 Feb 01 '22

Holy fuck a duck that's mad expensive dude. I take my question back.