Not that I needed more steel 72s or Scuba tanks in general, but I guess having 40+ good tanks isn't enough This year I had a few anniversaries (hydros) coming up so I did a quick visual and it seems I was the recipient of some wet fills somewhere along the line Needing 6 tumbles (possibly more) got me thinking that I need my own tumbler. Well, they're really not that hard to make so here's my go at it. JB, would you have done anything differently?
reidar, no it would not. The tread mill motor is DC, usually with a 0-90vdc input. Most of the fan type motors are induction type AC motors and will not work with any kind of speed controller.....well, they CAN be controlled but it's a lot more complicated and not worth the effort. I have seen some vacuum/hoover type motors that use brushes (as part of the motor design), those can be easily controlled with a variable speed controller but it is a different type than used on a tread mill. For this project, it's unlikely they would work as they tend to be low torque types. For a project like this, the tread mill motor is perfect, most others are not. I am thinking that auto window motors might work well for this project. Low speed with a built in gear reducet, lots of torque and easy to find. Simple variable or stepped (ie just a high and low speed) DC power supplies are easy to buy or build. They can be easily found at auto salvage yards or on line auto parts houses.
Friend of mine in the SF Bay Area has a nice tank tumbler that he built years ago. He doesn't use it or many of the steel tanks in his garage. All are available to anyone interested. Give me a holler to arrange pick up.