This is a powered air-supply respirator. I designed it to provide filtered air to the 3M Versaflo faceshield-assembly. But it could be modified to work with a wide variety of respirators. It is powered by a Milwaukee M12 Battery.
I have wanted a Versaflo system for wood-turning for a long time. But the $1200.00 to $1600.00 was way too much. I looked at the TREND AIR/PRO Airshield but I didn't like the proprietary batteries and the $60.00 filters. The Airshield costs $400.00. The parts for my Air Supply is about $55.00 plus printing supplies. The 3M Versaflo Face-Shield Assembly and hose was about $250.00. The whole thing is about $90.00 less than a Airshield.
For the non woodworkers the TREND AIR/PRO Airshield is a all in one system for dust control.
This design is simple with six major parts.
First is the filter holder that holds two HEPA filter for iRobot Roomba 800 900 series vacuum cleaner.
The second part is the air chamber. It holds a Resinta Activated Carbon Filter and the fan is mounted to the back.
The third part is the Fan Housing It surrounds the fan.
The forth part is the Back Cover.
The fifth part is the Hose adapter this attaches to the top of the fan.
The sixth is the Battery Holder and you have two options.
Option #1 is the attached Battery compartment and it has fore parts. Battery holder, switch housing, fan speed control board and the cover. It is mounted to the side of the unit with screws.
is a detached battery compartment. With this option you don't have to print the
four parts for the battery compartment. But you will lose the fan speed control. Milwaukee sells battery holders, with or without a charger. They are for powering there heated jackets or charging a phone. Do a search on Amazon for M12 Portable Power Source. You will find several starting around $14.00. You will need to find a cable to plug into the battery holder. I went through one of my boxes of old wall wart chargers and found a cable that fit the battery holder. I cut off the transformer, ran the wire through the side of the housing and hooked it to the fan. When you plug it in you will have full power all the time.
I put the unit together with fore pieces of all thread, acorn nuts, Knurled nuts and screws.
I added a belt to the air supply. I found it in the camping area of Walmart. I used a soldering iron to melt holes in the belt. Then I attached the belt by replaced two of the acorn nuts with two Double Tab Spot Weld Nut. I found them at Ace Hardware. Both belt and nuts are also available from Amazon.
The unit will accept any of the M12 Batteries. I run the unit for two hours with a 2 amp battery and it still had one bar when I put it back into a drill.
Resinta Activated Carbon Filters
Any 97mm x 97mm x 33mm 12V DC turbo blower fan will work.
Gdstime Turbo Blower Cooling Fan
Uniquegoods Vertical Mount Motor Speed Controller
Onyehn Horizontal Mount Motor Speed Controller
Baomain Male Spade Quick Splice Terminals
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