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Thread: Airtight joint?
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20th March 2017, 10:23 AM #16.
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I agree.
My statement might even sound self contradictory from what I have posted elsewhere but I still think that most wood workers, especially DIYers, have better things to do than dedicating countless hours of time to counting particles of dust. There are many things that most (but not all) DIY and even pro wood workers find safer, easier, more efficient etc to leave to others, like; making tools, electrical work, and even the sharpening of some blades, and dust particle measurement is in that category, especially where quick and dirty measurement can be completely meaningless.
As you are finding with measuring air flows, it takes a lot longer than one first thinks.
Particle counting is at least an order of magnitude trickier than air flow measurements for folks who are not measurement oriented.
For someone like yourself who measures stuff on a regular basis and has an inherent interest in the results it would not take as long to get up to speed but as you say cost is a significant factor as well.
Service from them here in Perth is variable but is has been very poor lately.
I mainly go there for men's shed stuff and have bought over 10 m of 6" and 15 m of 4" flexy from them in dribs and drabs. No discount of course - they made a big deal of giving us a 1/2m of bent/collapsed flexy for free!
One time I rang them to ask if they had any 6' flexy - "yes we have it" - spent over a hour driving up and back though peak hour traffic (yeah I know, Melbournians and Sydneyites can have a laugh laugh) and of course they didn't have any - a few words of embarrassment, but no apology. "Will you call me when you get it in", they took my number but there was no call.
Another time I needed a lathe chuck adapter and I had bought along the somewhat elderly chuck with me for thread fit/sizing. The assistant asked me what the size was I said I did't know but could we just try some adapters out to make sure they fitted. "Grumble grumble grumble - I don't have time for this nonsense" etc. I reminded him that this was not service and only a few weeks before hand the mens shed had bought two chucks from them. He kept quite after that and we found a suitable adapter in less than 30 seconds.
Some assistants have been helpful and cheerful about it.
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20th March 2017, 10:31 AM #17.
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A plain 44 gallon drum will not be big enough to remove visible detritus. To do this with a plain container needs something like a 10kL tank.
If you add basic separating components like a cyclone/thien then unless you have something like a 5HP DC you will lose too much flow from such a setup and will not even collect enough fine dust in the first place.
The ClearVue uses a special efficient design of cyclone, a 4HP motor and 15/16" impeller - there are good reasons for this.
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20th March 2017, 12:01 PM #18Member
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Not sure of the Importance of the seal but you can get a threaded rubber grommet that seals onto the flexi tube and then leaves a smooth round outer and inner that seals to straight pipe. Few size options of these seals. Carbatec stock them.
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20th March 2017, 08:56 PM #19Woodworking mechanic
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I saw those on a US YouTube video on building a system, didn't think you could buy them in OZ. Thanks for the heads up.
BTW the Grey flexy from Carbatec and Timbercon is, in my opinion, crap. It's so thin that it holes easily, even when tightening pipe hose clamps. I won't buy it again. I'll stick to the thicker Master PCV medium clear pipe from Advanced Duct Systems or Ezi Duct.
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20th March 2017, 09:46 PM #20.
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I agree they are soft but other than the clamp problem we have had good performance from the CT flex.
I've given up standard hose clamps even on really good flex - they are slow to put on and take of and they crush the life out of the flex.
Recently I had to use some standard clamps on the elephant trunks I refurbished and it reminded me of how awful they are.
ClearVue do sell a hose clamp that straddles the spiral wire and does not crush the flex but IMHO the threaded end cap coupler method is much more gentle, quick and flexible method in terms of taking the flex on and off a machine so the flex can be used as a vacuum cleaner, or moved to another machine.
I can't see the 6" flex threaded rubber hose connector on the CT website but I see they have some 4" - avoid using the externally threaded ones as they restrict the slow significantly.
The internal 4" threaded ones are better but they cost $15.
A 100 mm threaded DVW coupler and threaded end cap costs $5 and the 6" ones cost $11.
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20th March 2017, 10:11 PM #21Woodworking mechanic
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Threaded 6" DWV coupler over here is $23 (last weeks price) and the caps are also dear but I don't have a recent price. Wish we had pipeonline over here
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20th March 2017, 11:32 PM #22.
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