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Thread: Dc purchase
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16th February 2014, 09:32 PM #1
Dc purchase
Hi everyone
Ill get straight to the point i currently don't have any dust extraction.
I have two options.
In a year or so I plan on purchasing a clearvue 1800. After reading everything on here I am convinced it will be the system that I will have installed permanently with either the unit outside or it being vented outside. But that's roughly a year away
As I don't have anything other than a shop vac and filtration mask and goggles I need some form of 2hp system in my garage. I feel it will be better than nothing.I have 2 roller doors at front and one at rear so I get a nice flow of air when needed
I cannot for whatever reason find that thread I think that bobl created about modifying a standard 2hp dusty to enhance its features a little bit. Does anyone know if that thread still exists and can link it here any chance?
I just want to have a dusty to get me by that I will just connect to each machine as I use them (lathe. Hammer combo c3 31, bandsaw ) that I can upgrade a few features of to get me by until I can get a clearvue
Thanks in advance
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16th February 2014, 09:36 PM #2... and this too shall pass away ...
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Here it is. Nice piece of work, too.
https://www.woodworkforums.com/showth...eneric+bobl+hp
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16th February 2014, 11:22 PM #3.
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If you use modified 2HP you can install and take advantage of 6" ducting and also modify your machine outlets accordingly - then when you upgrade to a bigger unit nothing is lost.
If you do a nice job on it you should also be able to sell the modified 2HP DC for a bit more than you otherwise would.
PS It's really good to have that ability to open up the two ends of your shed like that.
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17th February 2014, 11:14 AM #4
Thank you for your replies. I am reading through the post now making notes of exactly what i need to do.
Im thinking this will get me by for the time being
http://www.garypye.com/Dust-Collecte...lter-p751.html
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17th February 2014, 11:42 AM #5... and this too shall pass away ...
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delbs,
Given that you will only use this machine for a year or so, it it worth having a look around for a second hand machine?
Cheerio!
John
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17th February 2014, 01:30 PM #6
Great idea, i did look around a while back but none were available. I will take a look again. Anyone on here have one they want to pass on?
Found one on Gumtree but i dont have time to drive up to Sussex inlet to get it. At least courier would be cheaper if i were to buy a cheap DC from hares and forbes or GPW
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17th February 2014, 06:11 PM #7Retired
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Here is one on gumtree that is 75 HP and is only a touch more than the cost of your "table saw": http://www.gumtree.com.au/s-ad/gwand...er-/1038357399
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17th February 2014, 07:31 PM #8
Ahh yes provided i wont loose the actual stock i square up inti the black hole timber eating horses in that machine it seems like a good fit lol
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18th February 2014, 10:40 AM #9
Bobl,
Do you think this is suitable for modification? or should i go for the generic Carbatech 2HP?
http://www.machineryhouse.com.au/W329
Also was thinking of this
http://www.machineryhouse.com.au/W328
then modifying it to fit 150mm piping
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18th February 2014, 12:10 PM #10.
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The 3HP H&F modified to a 6" intake will move more air than a generic 2HP modified at both intake and outtake.
The 3HP H&F would move even more air if the impeller to filter housing were not so pokey and contorted.
The better designs have the impeller attache direct to the back housing.
I was going to buy a used DC-7D and try to modify the outlet to see if I could improve the flow along the lines of what I did for the generic 2HP outtake but I could not see a way of doing it easily so I gave up on that idea.
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18th February 2014, 01:05 PM #11
Is the housing that you refer to as pokey and contorted welded in? Im assuming take to it with an anglegrinder?
So following another thread you linked me to, if i make 6" ducts for both intake and outake and use 6" to all of my machines i will get much better airflow than the stock 3HP machine?
i may just install a 2nd or 3rd 4" in my jet bandsaw, modifying the rest like the Hammer combo machine etc will be easier
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18th February 2014, 04:01 PM #12.
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The Twisty "Y" connecting the impeller to the filter housings are bolted together so angle grinder may not be necessary.
Here is how I would modify the DC7
Disassemble the DC and discard the Twisty Y
Lift the motor/impeller up onto a stand as per the generic 2HP DC thread. The 3HP motor is a fair bit heavier so it will need carefully placed support.
Cut the top and bottom rims off the bag housing
Make a well sealed box (18mm MDF would be heaps) that is large enough to cut out two holes on the top and bottom to inset the rims of the bag housings.
Glued and screw rims in place - leave enough rim protruding to enable filters/bags to be reattached.
Bolt and seal DC to the side of the box as per top diagram in photo.
Box could also employ curved inside corners to reduce turbulence.
This is effectively what the Carbatech and Woodfast 3HP DC have
DC7mod.jpg
Alternatively, leave bag housings intact and just bolt them together.
Before doing this make a curved flange/adapter as per the 2HP generic DC and attach opposite to the existing flange on one of the bag housings
Attach impeller to new flange.
The first one is the easiest as no curved flange need be constructed but it will be heavier and need more support.
The box and/flanges could be made all out of MDF - just like Jonno did in his mod.
These would be fun mods and not that hard to do.
So following another thread you linked me to, if i make 6" ducts for both intake and outake and use 6" to all of my machines i will get much better airflow than the stock 3HP machine?
converting the impeller intake from 4" to 6" and using 6" ducting.
Improving the outlets on all machines
The use of pleated filters
Modifying the impeller to Bag housing outlet
i may just install a 2nd or 3rd 4" in my jet bandsaw, modifying the rest like the Hammer combo machine etc will be easier
Cutting out the cross bar will improve things to around 350 cfm
Remember it takes 3 x 100 mm diameter ducts to equal the flow in one 6" duct.
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27th February 2014, 11:18 PM #13
So bobl the only modification you would make to the woodfsst 3hp machine would be use 6" ports everywhere?
Thanks for your advice so far. Its appreciated
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28th February 2014, 12:03 AM #14.
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28th February 2014, 07:14 AM #15Member
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Hi delbs,
When looking at 3HP units make sure you check that the impeller size is 13”.
I’ve see a number advertised recently with 12” impellers. Apart from having a bigger bag area, these would perform no better than a standard 2HP unit.
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