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  1. Replies
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    CLAIMED I’m in

    I’m in
  2. Hi John, The inlet is 6” to suit the most...

    Hi John,

    The inlet is 6” to suit the most efficient ducting size and the connection to the fan is 8” for cyclone efficiency. If it’s being connected to a smaller fan with a 6” inlet, either a 6”...
  3. Hi, John. The fibreglass cyclone you mentioned...

    Hi, John.

    The fibreglass cyclone you mentioned earlier does have a 6” inlet.

    Cheers Tim
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    Hi John, Its fair to say that the MK2 version...

    Hi John,

    Its fair to say that the MK2 version I has a slightly smoother shape which may explain the slightly better airflow figures.
    Also when you look at the actual numbers, there really isn’t a...
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    Hi John, I used to subscribe to the theory...

    Hi John,

    I used to subscribe to the theory that the direction of cyclone rotation needed to match that of the fan until I did some testing of my own.

    You may find this interesting Busting some...
  6. Replies
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    DRAWN & CLAIMED I’m in

    I’m in
  7. Replies
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    117,524

    DRAWN & CLAIMED I’m in

    I’m in
  8. Replies
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    746,493

    CLAIMED I’m in.

    I’m in.
  9. Replies
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    CLAIMED I’m in

    I’m in
  10. Assuming we're comparing filters on a dust...

    Assuming we're comparing filters on a dust collector to an unfiltered cyclone, in my experience the pressure losses are similar.

    The real difference comes comes from the work required to...
  11. Gidday Ged and welcome to the forum. It’s good...

    Gidday Ged and welcome to the forum.

    It’s good to see that you are considering dusty collection as a priority when you are setting up your shed. I think it’s fair to say that for most people when...
  12. Replies
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    The point I was trying to make is that building a...

    The point I was trying to make is that building a cyclone is a viable option. There are a number of wwf members who have done this.

    Im happy to answer any questions about building diy cyclones or...
  13. Replies
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    Hi Dex. Your plan to ditch the filter and...

    Hi Dex.
    Your plan to ditch the filter and replace it with a cyclone venting outside is potentially a good solution. I have posted a couple of threads with how I built my cyclone with a modified 2HP...
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    Hi Chris, I think you may have misunderstood my...

    Hi Chris,
    I think you may have misunderstood my post(s). I don’t believe I have ever suggested people should target a certain flow rate. Everyone’s situation is different and the last thing I want...
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    There's common theme on many woodworking threads...

    There's common theme on many woodworking threads about needing to match cyclone and fan rotation, and if this can't be achieved then adding a flow straightening device in the cyclone air outlet tube...
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    Hi Neil, The cone is around 840 long and 470...

    Hi Neil,
    The cone is around 840 long and 470 diameter so l/d radio is around 1.8. As I mentioned earlier the design is not based on any of BP's magical formulas, only what I thought looked right and...
  17. Replies
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    Hi Neil, The chip outlet is around 200 mm...

    Hi Neil,

    The chip outlet is around 200 mm diameter. I can't recall how or why I came up with that size or how it compares to the BP design, I think i just settled on that for my prototype because...
  18. Replies
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    Hi Neil, Testing with a larger fan is...

    Hi Neil,

    Testing with a larger fan is definately on the agenda at some point, the problem is finding something suitable at a reasonable price. In my small shed, I can get around 600cfm through my...
  19. Replies
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    Thanks for this, you are absolutely correct. I've...

    Thanks for this, you are absolutely correct. I've edited my posts above.
  20. Replies
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    It is designed to fit a carton which NZPost will...

    It is designed to fit a carton which NZPost will ship to your door for a very reasonable figure. If you are interested please feel free to send me a PM.
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    Hi Dom, Thanks for your comments. [Edit] As...

    Hi Dom, Thanks for your comments.

    [Edit]
    As you correctly point out, I have got this wrong. The minimum SP reading is not necessarily the pressure loss of the cyclone. I'll try to get this...
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    Busting some cyclone myths

    I thought I’d post on some testing I recently carried out on my cyclone which has thrown up some interesting results and hopefully bust a few myths in the process.

    I’ve previously tested and...
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    Hi Newby, I've posted a couple of threads. The...

    Hi Newby,

    I've posted a couple of threads. The first one is about the prototype here which includes the testing for the fan curve attached above, andhere is the post on the mark II version which I...
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    Nice cyclone build. If you want to make some...

    Nice cyclone build.

    If you want to make some flow measurements you could do this indirectly by knocking up simple manometer to measure static pressure and reading off air flow from the attached...
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    Hi DomAU. I'm with Bob on this one. Regardless...

    Hi DomAU.

    I'm with Bob on this one. Regardless of the length of 4" pipe run, the killer is the 6" to 4" reducer. You are right that air is more compressible than water but the fans that most of us...
  26. Replies
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    Gidday Woody and welcome to theforum. ...

    Gidday Woody and welcome to theforum.

    Exhausting the extractor outsideis a good approach provided you have some sort of pre-separation prior to thefan to catch the bulk of your waste. With good...
  27. Replies
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    Hi Cam, Being NZ based, I can't help with...

    Hi Cam,

    Being NZ based, I can't help with Australian suppliers, but when I carried out a similar exercise recently, I found a local company which supplied 160 dia flex to match the PVC pipe OD....
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    Hi Stranger. If you need to run a 10m line,...

    Hi Stranger.

    If you need to run a 10m line, I'd suggest having it on the outlet side but increase the pipe size to 200mm. Going from 150mm to 200mm is about twice the pipe cross section so air...
  29. Thread: 1000 c f m

    by Muchacho
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    Since there are still a whole heap of unanswered...

    Since there are still a whole heap of unanswered questions in this thread I thought I would pitch in and provide my 2 cents worth based on the research and work I have carried out to date on...
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    Even better idea if your shed situation permits,...

    Even better idea if your shed situation permits, is to ditch the bag completely and blow straight outside. Best party is never having to clean a filter again.....

    ( BTW if you are looking for a...
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    There is another way of dealing with the PVC to...

    There is another way of dealing with the PVC to flex connection. Buy 160 dia flex which fits the PVC OD perfectly.
  32. Thread: Clone dusty

    by Muchacho
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    Hi fubar. Nice job so far. I hope you keep us...

    Hi fubar.
    Nice job so far. I hope you keep us updated with your progress on this.
    If your aren't already planning to do this, I'd suggest that when setting up with your larger dusty you look at...
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    Hi Artme, Having a fan with a 14" impellor...

    Hi Artme,

    Having a fan with a 14" impellor will form a good platform to build a serious extraction system.

    To get the best out of this I'd suggest running this with 150mm ducting and building...
  34. Replies
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    Hi Afro Boy, Good on you for looking to...

    Hi Afro Boy,

    Good on you for looking to improving your extraction setup.Having been through this exercise myself building a 2HP cyclone (see fibreglass cyclone project ) I appreciate the work...
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    Bob, Thanks for your kind words. If you...

    Bob,

    Thanks for your kind words.

    If you have another look, you will see that it does have a ramped intake. Instead of having a flat top with a separate ramp sitting below this like other...
  36. Replies
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    Glenn, The glass I've used is a fantastic...

    Glenn,

    The glass I've used is a fantastic cloth called double bias which is two layers of unwoven rovings oriented at +- 45 degrees to the direction to the roll. These are then held together with...
  37. Replies
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    Hi Pete, I can’t say that I have noticed any...

    Hi Pete,

    I can’t say that I have noticed any static buildup when using my cyclone. I’ve been using it for about a year now but it didn’t get a lot of use at the height of last summer when it would...
  38. Replies
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    Fibreglass Cyclone Mark 2

    People may recall my original post for the fibreglasscyclone project. Based on the feedback received and some other enquiries, I’veset out on a mission to produce a similar thing for others.
    ...
  39. Replies
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    Hi Scally I've just finished using a lot of...

    Hi Scally

    I've just finished using a lot of West Systems 05/206 on a fibreglass project and found that in this cold weather it needed an elevated heat postcure.

    You could try building a...
  40. Replies
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    Hey Shane, Great idea about getting rid of...

    Hey Shane,

    Great idea about getting rid of your 1HP dusty and replacing it with a cyclone.

    For best results I’d suggest ditching the bag also and venting directly outside. A 4” cyclone will...
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    These machines look like very good buying...

    These machines look like very good buying providing they have 13" or 14" impellers. I reckon these would be great for a small shed cyclone project. Opening up the inlet to 200mm would definitely be...
  42. Thread: Dc purchase

    by Muchacho
    Replies
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    Hi delbs, When looking at 3HP units make sure...

    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...
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    Bob, Thanks for your response. All of my...

    Bob, Thanks for your response.

    All of my readings were taken with the fan drawing through the cyclone and exhausting outside through a 600 x 400 louvre in my shed wall. This setup causes about 1”...
  44. Replies
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    Time for an update on my ongoing cyclone project....

    Time for an update on my ongoing cyclone project. I had always planned some airflow testing, but wanted to first square away a minor modification to try and squeeze the last few cfm’s out of my...
  45. Replies
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    Hey OtakiriLad. Have a look at the Fibreglass...

    Hey OtakiriLad. Have a look at the Fibreglass Cyclone Project thread and you'll see some 6" fibreglass machine intakes which I've produced. The latest one on the thread for the jointer was quite...
  46. Replies
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    Thanks for for your kind feedback. The cyclone is...

    Thanks for for your kind feedback. The cyclone is made using a couple of basic timber forms to produce the main shell and the round to rectangular inlet transition. The top was formed as a flat ring...
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    Bob, The jointer cabinet has a couple of...

    Bob,

    The jointer cabinet has a couple of pressed louvre panels and the whole machine is lifted off the ground by the mobile base so there’s plenty of air drawn into the machine. Checking with my...
  48. Replies
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    Thought I’d add an update as the forum seems to...

    Thought I’d add an update as the forum seems to be a bit slow lately. Have just built a 6” outlet for my jointer using my slowly developing fibreglassing skills.

    Although not strictly required, I...
  49. Replies
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    Narrow Oak Table

    I thought people might be interested in a table I have recently completed. Dimensions are 2000 x 650 x39 thick built from FAS American Oak. It's to be used as a sewing table for my beloved in a spare...
  50. Albert, One thing you could consider is...

    Albert,

    One thing you could consider is building yourself a semi-flexi duct. Get some PVC pipe, trim it into short lengths (say 0.5m to 1.0m depending on articulation required) and join it with...
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