Replies

1. 
   JMartinsky | Oct 03, 2006 05:40am | #1

   Dear J,
   I didn't suffer from space restrictions as you do, my restrictions are more of the financial nature. That being said, I invested in an Oneida DC system. I have a 3 HP system that Oneida designed. The longest run I have is approximately 70' with three 90s and it would rip a shirt off if you got too close to an open blast gate. At the end of that run is my jointer, 15" planer and TS. Never a clog and it draws like H*ll, even with two other blast gates open. Contact Oneida, they will size and design the system according to budget and shop size. They really are great to work with.

   Best,

   John

   http://www.oneida-air.com/

1. 
   jrogerh | Oct 04, 2006 01:19am | #3

   I looked the Oneida and was very impressed.  Especially by the price! 

2. 
   hammer1 | Oct 03, 2006 06:26am | #2

   Some stationary planers have a chip deflector. You have to remove it when you add a dust collection hood. Delta X5 for example. A 500 cfm collector may have a little trouble when planing 12" boards, especially with something like pine, but it shouldn't be totally ineffective. I'd check behind the hood for jammed shavings and around the impeller on the collector. I'm guessing you are using a 4" duct, any smaller and you won't move enough air.

   Beat it to fit / Paint it to match

1. 
   jrogerh | Oct 04, 2006 01:21am | #4

   Do you think a 2 HP 1400 CFM DC would be adequate for a 15" planer?  I would have to have a run of 30 or 40 feet.

1. 
   frenchy | Oct 05, 2006 02:44am | #6

   jrogerh

    Not in my case I have a 20 inch planner and the 2 hp 1400 cfm dust collector isn't big enough unless I'm only doing light planning.. heavy planning clogs it up..

     On the other hand  ;-) I usually try to turn 6x6 timbers into toothpicks in a single pass.

2. 
   hammer1 | Oct 05, 2006 08:19am | #8

   The simple answer is, yes. It is a bit more complicated. Ideally, you want about 750CFM for a 15" - 20" planer and a velocity of 4000 FPM. I think you need a 6" duct to move that much air at that velocity. A 4" will only move about 350CFM. You loose static pressure with length of duct, elbows and other restrictions. The values assigned to these fittings and ducts are estimates since it's difficult to know how well things fit and flow. Type of duct can also have a big impact, flex pipe is less efficient than smooth. It would be great to have a 6" duct with the necessary power from the collector. Many small shops function well with less. We don't always use the planer to it's full capacity. You could run a 5" trunk line and tap off that for other machines. I doubt if you would have any problems with a 5" and a 1400 CFM collector. 4" will be pressed but I'm sure many run that with some success.Beat it to fit / Paint it to match

1. 
   TKanzler | Oct 06, 2006 06:32pm | #9

   "Ideally, you want about 750CFM for a 15" - 20" planer and a velocity of 4000 FPM. I think you need a 6" duct to move that much air at that velocity."

   That's correct, and it's easy to remember as 4-6-8: 4000 ft/min through a 6" round duct is 800 cfm.

   4000 ft/min through a 4" round duct is only 350 cfm, but I don't have a good memory aid for that one.  It also takes almost twice as much static pressure to move air at 4000 ft/min in a 4" duct as it does in a 6" duct, for the same length, and not counting any entry losses.Be seeing you...

2. 
   jrogerh | Oct 06, 2006 09:05pm | #10

   All my power tools have a 4" duct.  Is it simply a matter of using adapters to match a a 5 or 6 " duct?  Or do I have to somehow resize the outlet ports on the tools themselves? 

1. 
   hammer1 | Oct 07, 2006 03:46pm | #11

   Many small shop machines have 4" ports, some smaller. A reducer will restrict the volume of air that can pass. It's not all that bad unless you are an intensive chip producing shop. Plenty of small shops use 4" and it can do an adequate job. The planer makes the most debris and needs the most flow. The Delta 15" has an optional dust hood for a 5" duct but lots of folks step down to a 4" with success. Looking back on your original post, I wonder why the Grizzly didn't work to some extent, especially with a short hose. I still wonder if you have a chip deflector on the planer or some other reason why you are not able to collect. If there is a problem, it won't matter if you run a 12" duct with a 30hp collector. What brand and model planer are you using and what model collector? How much do you use the planer and what type of lumber and sizes do you normally run? A realistic look at what you do will tell if you need to think about changing ports or buying a larger system.Beat it to fit / Paint it to match

2. 
   jrogerh | Oct 07, 2006 11:57pm | #12

   I have a Grizzley G8027 DC with 1 HP motor, 4" port and 500 cfm capacity.  My planer is the Gizzley G0550 15 inch model.  I have not use the planer much yet.  Mostly I have surfaced 3/4" walnut about 13" wide. 

   Once I removed the hose from the DC and felt the suction at the inlet port.  It felt very strong.  I then attached a 6 ft piece of hose and felt the suction at the end and it seemed to have very little suction there.  ???

3. 
   hammer1 | Oct 08, 2006 01:22am | #13

   Your 8027 is a 5 amp wimp, sorry to say. Good for small tools but not much better than a shop vac on a stationary planer. You need a better collector. The G0550 has a chip deflector under the hood. It's a flat piece of nylon/plastic probably about 3" x 15" x 1/4" thick held on by three or four screws. Part #36 on your schematic. It's usually recommended that it be removed when using a dust collector. The planer is pretty much a copy of the Delta. The Delta 5" hood might fit if you wanted a full 5" run. They don't give them away and they are sized for a short length of flex that connects to spiral pipe. Unless you are going to plane a lot of that wide walnut, a 4" with a better collector will probably do a decent job.Beat it to fit / Paint it to match

4. 
   jrogerh | Oct 08, 2006 08:52pm | #14

   Really appreciate your info.  I guess I missed seeing or feeling the chip deflector.  I'll take another look and remove it.  If I do need a larger DC how big in terms of HP, cfm, fpm, etc would I need to go?

5. 
   hammer1 | Oct 11, 2006 02:19am | #15

   If you haven't visited Bill's site, you should. Lots of good information on dust collection. I think you can find answers to many questions here.
   http://billpentz.com//woodworking/cyclone/Ducting.cfmBeat it to fit / Paint it to match

3. 
   DougF | Oct 04, 2006 05:44pm | #5

   My experience with a 15' planer with a 2-hp Oneida was that it could not move the chips fast enough with the standard 4" port ducted to a 5" line.  When I enlarged the dust shroud to accommodate a 5" blast gate connected by a short 6" line into the 7" main line, no problems even when planing 12-14" boards.

   RANT:  This is another example where manufacturers short-change us by cheap and easy dust shrouds with a "standard" 4" port opening when the shroud's port should be designed to handle the planer's "maximum" output.  If the owner can't accommodate the large port then it is easy to reduce down. 

4. 
   CaptainChaos | Oct 05, 2006 03:56am | #7

   I have an Oneida-air designed system too and am very happy with it. I even re-used the motor and blower from my old Jet double-bagger. The definitive book on dust collection is by Sandor Nagyszalanczy called Woodshop Dust Control. I have an older printing, but in there he gives approximate requirements for each kind of machine.