I too, discovered I needed a cart that would hold most of my welders/cutter and big bottles, yet remain easy to maneuver around shop, carport and driveway....I wanted a cart that would support every welding process, MIG-STICK-TIG and PLASMA plus large Argon and C25 bottles but still roll around easy and be able to get up close to my work.
These pics show it as it is today, but I'll modify it soon to support my new HTP-221 TIG/STICK after it arrives Monday....As it sits, it all weighs in at almost 600Lbs, but rolls really easy and safe. Once in position, I just lock the casters and get after it.
On top is a Hobart 210MVP MIG, HF plasma(now a Hypertherm Powermax 30), Hobart Stickmate 235LX AC/DC(to be replaced by HTP-221 TIG/STICK next week), and two 150CF gas bottles. Behind the Stick welder on bottom shelf is my spool gun and plasma consumables....On each side is a nema 6-50 25" extension cord....Behind the plasma is a nema 6-50 gang box that every welder/cutter plugs into so just one extension cord powers the whole cart.
I got the super heavy duty casters and weld on caster plates from CasterCity.com, and painted it all with Rustoleum spray on truck bed liner.
The cart frame is all made from 1x1 x1/8" square tubing and angle I dug out of the trash at work...all Mig welded.
Shucks, I need to finger out how to attach pics, huh?
