Thread: Rexon Dust Extraction

The 1HP units are nigh on useless for any sort of realistic fine dust control - they only draw about 350 cfm which is about 1/3rd of the recommended volume rate required.

The 2HP units with 4" ducting are also dogs and will only pull just over 400 cfm but they are amenable to modification that will enable them to draw around 900 cfm with 6" ducting and a pleated filter - see https://www.woodworkforums.com/f200/generic-2hp-dc-171247
The Rexon modification would be even easier because it already has the curved flange in the bag housing to which the impeller looks like it can be bolted to directly.

The reason those 2HP motors have a 15A plug on them is because of the high start up currents, but once they are running they will only draw ~7A.
To get around this there is a very simple device that allows 15A devices to be legally connected to 10A sockets
They have a breaker on them that handles the high start up current and that will trip if it goes over the 10A for a long enough period.
Someone posted a link to it in the Dust forum but I cannot find it - anyone else help out here?
Ideally you should try before you buy but they are not that expensive and even if you don't use it for this you will find it handy for other applications

If that doesn't work another possibility is to source a 2HP motor that does not require 15A plug.

A third possibility is to use a used 2HP 3 phase motor with a VFD. This will cost around $200 provided you are capable of installing yourself BUT it will enable the impeller to run at higher RPM and should generate ~1000 cfm.

It seems such a pity to fix up such a powerful unit and then have to dispose of it.

All of the above assumes you will use 6" ducting throughout and modify the machinery outlets to suit.

Originally Posted by BobL

The 1HP units are nigh on useless for any sort of realistic fine dust control - they only draw about 350 cfm which is about 1/3rd of the recommended volume rate required.

The 2HP units with 4" ducting are also dogs and will only pull just over 400 cfm but they are amenable to modification that will enable them to draw around 900 cfm with 6" ducting and a pleated filter - see https://www.woodworkforums.com/f200/generic-2hp-dc-171247
The Rexon modification would be even easier because it already has the curved flange in the bag housing to which the impeller looks like it can be bolted to directly.

The reason those 2HP motors have a 15A plug on them is because of the high start up currents, but once they are running they will only draw ~7A.
To get around this there is a very simple device that allows 15A devices to be legally connected to 10A sockets
They have a breaker on them that handles the high start up current and that will trip if it goes over the 10A for a long enough period.
Someone posted a link to it in the Dust forum but I cannot find it - anyone else help out here?
Ideally you should try before you buy but they are not that expensive and even if you don't use it for this you will find it handy for other applications

If that doesn't work another possibility is to source a 2HP motor that does not require 15A plug.

A third possibility is to use a used 2HP 3 phase motor with a VFD. This will cost around $200 provided you are capable of installing yourself BUT it will enable the impeller to run at higher RPM and should generate ~1000 cfm.

It seems such a pity to fix up such a powerful unit and then have to dispose of it.

All of the above assumes you will use 6" ducting throughout and modify the machinery outlets to suit.

Thanks for your info Bob, this to me seems like a very powerful unit, I recon it will suck your undies from under your shorts, but having said that I don't know much about dust extraction units, I read the other thread you linked, and is all a bit over my head! my main hobby is metal work and I just got a free Makita table saw and thought I fix this old dusty to save making a mess when
cutting a bit of wood now and again, then I found out about the current draw 17amps at start up, 7,7 running is ok,
as measured by clamp amp meter , not to worried about the fine dust as I will be cutting
outside, I only have a 2 & 1/2 car garage and very limited space, so a smaller unit will be better, I thought some one here would benefit from it, if not I will Ebay it, if I have to spend any more on this I may as well buy what I need new,


thanks again,

Richard.

Originally Posted by Dano48

Thanks for your info Bob, this to me seems like a very powerful unit, I recon it will suck your undies from under your shorts, but having said that I don't know much about dust extraction units, I read the other thread you linked, and is all a bit over my head! my main hobby is metal work and I just got a free Makita table saw and thought I fix this old dusty to save making a mess when
cutting a bit of wood now and again, then I found out about the current draw 17amps at start up, 7,7 running is ok,
as measured by clamp amp meter , not to worried about the fine dust as I will be cutting
outside, I only have a 2 & 1/2 car garage and very limited space, so a smaller unit will be better, I thought some one here would benefit from it, if not I will Ebay it, if I have to spend any more on this I may as well buy what I need new.

Metal workers needs fume extraction as much as woodworkers need dust extraction. I have a 1600 cfm fan extracting fumes from the metal work end of my shed. It gets rid of welding and spray paint fumes most efficiently.
If you have no space inside the shed what about locating the unit outside in a sound proof enclosure - that has many advantages including freeing up space and getting rid of the noise.

Anyway I don't want to labour it for you if you have already made up your mind.
Cheers

Originally Posted by BobL

Metal workers needs fume extraction as much as woodworkers need dust extraction. I have a 1600 cfm fan extracting fumes from the metal work end of my shed. It gets rid of welding and spray paint fumes most efficiently.
If you have no space inside the shed what about locating the unit outside in a sound proof enclosure - that has many advantages including freeing up space and getting rid of the noise.

Anyway I don't want to labour it for you if you have already made up your mind.
Cheers

I Know what you're saying Bob, and I appreciate you wanting me to keep this, believe me if I could I would, my metal work involves no welding at all and very little painting,(I usually do this at work on my breaks) as for fitting the unit outside is also a no go, SWMBO would not approve and this modern homes have very little space around, only reason I have an extra 1/2 a garage is we converted the study into a work shop I realistically have no other option but to get a small unit.
I found what you said, about a 15Amp to 10Amp adaptor with a safety switch plug, JayCar sells them about $80.00, thanks for that, I learned something new today

I thank you for your time Bob,

Cheers,
Richard.