Does anyone have a copy of the fan performance curve of JET 1.5HP 1100
dust collector? If someone can give me a link to the fan curve, that
will be great. If a link is not available, I will be happy just to get
the following info:

- What's its CFM at 7.3" static pressure?

- What's the static pressure that it can overcome at 790 cfm?

Thanks in advance.

Jay Chan

"Jay Chan" wrote in message
om...
Does anyone have a copy of the fan performance curve of JET 1.5HP 1100
dust collector? If someone can give me a link to the fan curve, that
will be great. If a link is not available, I will be happy just to get
the following info:

- What's its CFM at 7.3" static pressure?

- What's the static pressure that it can overcome at 790 cfm?


You won't find curves, but you will get some information here.
http://www.wmhtoolgroup.com/JETWood/Tools/DC610.html

Not your DC, but similar fans are he
http://www.pennstateind.com/Merchant...chor-Fan-49575

Jay, I understand what you are trying to do, I understand your health
concerns. But I still think you are over-engineering considering that you
are using a one tool setup and not a main trunk line with branches to many
tools. Hook it up, turn it on, and watch how well it sucks up the dust.
Ed

Not your DC, but similar fans are he
http://www.pennstateind.com/Merchant2/merchant.mv?
Screen=DUST&Store_Code=PSI#Anchor-Fan-49575

Thanks. I have found the fan curver for a similar dust collector in
that web site. It is a 1-1/2 HP dust collector that uses a 11"
impeller (it has a 5" inlet instead of 6" as in my JET canister dust
collector).

From the tiny fan curve picture, I can draw this conclusions:
- It can do 625 cfm at 7.3" static pressure.
- It can overcome up to 6" static pressure and still achive 790 cfm.

Not bad for my one-machine-at-a-time application. I probably need to
do some small adjustments to get what I want, such as using a straight
pipe in place of most of the flex hose, moving the 45-degree lateral
tee as close to the table saw as possible ...etc. Great!

Thanks for the links.

Jay, I understand what you are trying to do, I understand your health
concerns. But I still think you are over-engineering considering that you
are using a one tool setup and not a main trunk line with branches to many
tools. Hook it up, turn it on, and watch how well it sucks up the dust.

I understand your suggestion. Actually, I prefer what you have
suggested. But I cannot do this any more since the local WoodWorker
Warehouse store has closed. I cannot just go there to pick up some 4"
fittings/hose and try at home. I will have to mail order everything
before I can try it, or I will need to drive two states away to a
WoodCraft store in Connecticut. If what I order doesn't work out, I
will have to pay shipping to send them back if they have a liberal
refund policy. My local Home Depot only carry 2.5" fittings and pipes.
I think I will save some money by doing some home work first.

I wish WoodCraft will open a store near where I live. Oh well...

Jay Chan

"Jay Chan" wrote in message
om...

refund policy. My local Home Depot only carry 2.5" fittings and pipes.
I think I will save some money by doing some home work first.

Jay,

Many times, the sewer and draing fittings and pipe are located in a
different area of the store from the PVC fittings and pipe. S&D fittings
and pipe are bunches cheaper than PVC pipe fittings. The S&D fittings are
stocked in every Home Depot store I've been in, but they were not in an
obvious place. They are also much higher quality than the Taiwanese dust
collection fitting junk sold at virtually all wood working stores. Look
inside one of the Taiwanese elbows and you'll see what I mean. The S&D
fittings are also larger diameter (less flow restriction).

I recently completed a network that used S&D pipe, S&D fittings, a few dust
collection splice fittings, and the metal Taiwanese blast gates. I'm very
pleased with the results. I hope your Home Depot does carry the S&D stuff
and someone is able to direct you to it.

Best regards,
Bob

Many times, the sewer and draing fittings and pipe are located in a
different area of the store from the PVC fittings and pipe.

Thanks for reminding me that I can use S&D pipes. I am sure I will be
able to finding them because there are at least 4 Home Depot stores
between where I live and where I work. Good. This means I can at least
secure one source for the pipes and fittings instead of totally
depending on mail order.

I recently completed a network that used S&D pipe, S&D fittings, a few dust
collection splice fittings, and the metal Taiwanese blast gates. I'm very
pleased with the results. I hope your Home Depot does carry the S&D stuff
and someone is able to direct you to it.

May I ask you questions related to using S&D pipes and fittings:

- How do they look? Are they look like thin wall plastic pipes? Are
they in black or in white (with some blue letters on the surface)? I
am trying to look for them in Home Depot.

- Do they fit well with standard dust collection fittings (such as
connecting to the 5" or 6" air inlet of the dust collector, or to a
metal blast gate)? How's about connecting them with flex hoses? Any
special tip in putting them together?

Thanks.

Jay Chan

"Jay Chan" wrote in message
om...

May I ask you questions related to using S&D pipes and fittings:

- How do they look? Are they look like thin wall plastic pipes? Are
they in black or in white (with some blue letters on the surface)? I
am trying to look for them in Home Depot.

- Do they fit well with standard dust collection fittings (such as
connecting to the 5" or 6" air inlet of the dust collector, or to a
metal blast gate)? How's about connecting them with flex hoses? Any
special tip in putting them together?

Excellent questions as well as the other post regarding static.

Regarding fit, my answer may seem like "bailing wire and chewing gum" to you
but the results are very predictable and solid. If you cannot understand my
verbal descriptions, let me know and I will post some pictures.

First - what do they look like? All of the S&D fittings I have seen (both
Lowe's and Home Depot) are solid white. They look exactly like schedule 40
PVC pipe fittings, except they are thinner. Most of the fittings are under
$2 each. I think the "Y" fitting was about $4.50. I recommend that you buy
lots of 45 degree fittings. I used two 45's plus a 15" piece of pipe to
create a 90 degree turn. Six inch fittings are available at Lowe's but I do
not remember seeing them at Home Depot. The S&D pipe is much thinner than
sch 40 pipe. Its either white or turquois. It sells for about $4.50 for a
4" x 10 foot section. I think I remember seeing a 6" x 4" reducer at
Lowe's. The metal duct fittings sold with air conditioning ducts will also
fit inside the S&D pipe.

I used the standard "splice" fitting sold at all woodworking stores to adapt
for flex hoses. Wrap one end of the splice fitting with 3 layers of duct
tape. Make four 1/2 " slits at 90 degree intervals in the S&D pipe. Insert
the taped end of the splice fitting inside the slitted S&D pipe. Clamp with
a 4 1/2" clamp. It fits nice and tight. The hose goes on the other end of
the splice fitting.

For clamps, I recommend you buy these at Lowe's or Home Depot. Forget the
clamps sold in woodworking stores. They usually will fit 4" diameter and
nothing bigger. For S&D pipe, you need a 4 1/2" clamp. I usually buy the
clamp that will fit 3 1/2" to 5" pipe. It sells for about $1.50. If you
think you need 15 clamps, buy 30. You will use lots of them.

For the blast gates, I wrapped their connection nozzle in 3 layers of duct
tape (ripped at 1/2" width), then used the slitted S&D pipe (described
above) to clamp over the nozzle. Again, this fits nice and snug. You will
be pleased with the fit. I found the metal blast gates on sale at Rockler
for $6.74 each. I was lucky. If you use the metal gates, be sure to mount
the gate with the knob down.

In the future, I plan to come off my dust collector with 6". My collector
has dual 4" Y fitting over 6" opening. I will remove this adaptor and use a
6" metal fitting from the air conditioner section. It slides right over the
6" dust collector fitting.

I used aluminum duct tape to seal my connections and I am very pleased with
the mechanical strength and seal. Its good stuff and superior to regular
duct tape in this application. Its expensive ($12.50 for 50 feet).

Metal 26 guage duct fittings are available in the air conditioning section
at Lowe's and Home Depot (not the 30 guage stove pipe!). They fit nicely
inside the S&D pipe. I was planning to use some of these until I discovered
that Lowe's just got in a huge shipment of S&D PVC fittings. If you use 6"
pipe, you may have to use some of the metal fittings to get it all together.

For free form dust collection (like a drill press or sanding), I found an
adaptor that makes a nifty rectangular dust collection nozzle. Its used to
adapt 4" S&D pipe to a 4"x3" rain gutter system. I used a splice fitting to
connect this to a 4" flex hose. I use 4" flex hose everywhere that most
people use 2 1/2". I found the 4" provided superior performance. Its really
gratifying to be running a large Forstner bit on the drill press and see all
of the shavings stream into my home made nozzle. What a luxury to never have
to sweep up around the drill press.

For hanging the pipe, I found a very nice plastic "hook" shaped pipe hanger
at Lowe's. It works well with my ceiling joists. It costs 90 cents. You
don't need many hangers because the S&D pipe is so light. I used one hanger
about every five feet.

I completely blew off static electricity. I did nothing. I have yet to see
a spark or get a shock. This is somewhat attributable to the fact I live in
a humid climate (Houston). If I needed to, I had planned to spiral wrap the
pipe with aluminum duct tape and connect it with copper wire.

Sorry this got to be so long, but I wanted you to benefit from all the
machinations I went through. I'm sure this is common experience with many
other people, but I've never seen the details documented.

Bob

I believe the Jet has an 11" impeller. Its performance will be similar to
any brand with an 11" impeller. Blowers do not vary with rocket science
engineering innovations. The main difference is in how the various dust
collectors are hyped with marketing claims. You'll notice that hardly any
manufacturer quotes a static pressure reference when they publish the
claimed CFM capacity. That's why you see various 2 HP collectors with specs
ranging from 1200 to 1800 CFM.

Bob


"Jay Chan" wrote in message
om...
Does anyone have a copy of the fan performance curve of JET 1.5HP 1100
dust collector? If someone can give me a link to the fan curve, that
will be great. If a link is not available, I will be happy just to get
the following info:

- What's its CFM at 7.3" static pressure?

- What's the static pressure that it can overcome at 790 cfm?

Thanks in advance.

Jay Chan

I believe the Jet has an 11" impeller. Its performance will be similar to
any brand with an 11" impeller. Blowers do not vary with rocket science
engineering innovations. The main difference is in how the various dust
collectors are hyped with marketing claims. You'll notice that hardly any
manufacturer quotes a static pressure reference when they publish the
claimed CFM capacity. That's why you see various 2 HP collectors with specs
ranging from 1200 to 1800 CFM.

Yes, I understand what you said. This is the reason why I looked for
the fan curve instead of believing that I will get 1100cfm just
because the model number has 1100 on it. Thanks for the confirmation
though.

Jay Chan

I agree that there is no rocket science being applied here but some do
better than others. Just replacing the impeller with one from Oneida
will make a tremendous improvement. Somewhere I have a copy of the fan
curve for their impeller. When I come across it I'll share it. I do
recall that when I made measurements on my system several years ago
Oneida's data was conservative.

RB

Bob Davis wrote:
I believe the Jet has an 11" impeller. Its performance will be similar to
any brand with an 11" impeller. Blowers do not vary with rocket science
engineering innovations. The main difference is in how the various dust
collectors are hyped with marketing claims. You'll notice that hardly any
manufacturer quotes a static pressure reference when they publish the
claimed CFM capacity. That's why you see various 2 HP collectors with specs
ranging from 1200 to 1800 CFM.

Bob


"Jay Chan" wrote in message
om...

Does anyone have a copy of the fan performance curve of JET 1.5HP 1100
dust collector? If someone can give me a link to the fan curve, that
will be great. If a link is not available, I will be happy just to get
the following info:

- What's its CFM at 7.3" static pressure?

- What's the static pressure that it can overcome at 790 cfm?

Thanks in advance.

Jay Chan

Just replacing the impeller with one from Oneida
will make a tremendous improvement.

I also see the same recommendation in one of the dust collection book.
How's your result after you have replaced the original 11" impeller
with 12" impeller?

Somewhere I have a copy of the fan
curve for their impeller. When I come across it I'll share it. I do
recall that when I made measurements on my system several years ago
Oneida's data was conservative.

Thanks in advance for sharing the fan curve if you can find it.

Jay Chan

I'm sorry I can't quantify the improvement. I've recently moved so much
of my "stuff" is still packed but the improvement was very noticeable.
I flew out and visited Oneida when I was designing my dust collector
and, as an engineer, was quite impressed with their hardware and
engineering competence.

RB

Jay Chan wrote:
Just replacing the impeller with one from Oneida
will make a tremendous improvement.


I also see the same recommendation in one of the dust collection book.
How's your result after you have replaced the original 11" impeller
with 12" impeller?


Somewhere I have a copy of the fan
curve for their impeller. When I come across it I'll share it. I do
recall that when I made measurements on my system several years ago
Oneida's data was conservative.


Thanks in advance for sharing the fan curve if you can find it.

Jay Chan

I'm sorry I can't quantify the improvement. I've recently moved so much
of my "stuff" is still packed but the improvement was very noticeable.

"Noticable" is good enough for me. The only down side is the price:
$141 for a 12" impeller. I will try to improve the air flow by
replacing as much flex hose with straight pipe as possible to see if
this helps. If not, I will consider the 12" impeller.

Thanks.

Jay Chan

Relevant? Here's a couple of DC improvement pages.

http://cnets.net/~eclectic/woodworki...lone/index.cfm

http://home.pacbell.net/jdismuk/cyclone.html


"Jay Chan" wrote in message
om...
Does anyone have a copy of the fan performance curve of JET 1.5HP 1100
dust collector? If someone can give me a link to the fan curve, that
will be great. If a link is not available, I will be happy just to get
the following info:

- What's its CFM at 7.3" static pressure?

- What's the static pressure that it can overcome at 790 cfm?

Thanks in advance.

Jay Chan

"Eric Ryder" wrote in message
...
Relevant? Here's a couple of DC improvement pages.

http://cnets.net/~eclectic/woodworki...lone/index.cfm

http://home.pacbell.net/jdismuk/cyclone.html


"Jay Chan" wrote in message
om...
Does anyone have a copy of the fan performance curve of JET 1.5HP 1100
dust collector? If someone can give me a link to the fan curve, that
will be great. If a link is not available, I will be happy just to get
the following info:

- What's its CFM at 7.3" static pressure?

- What's the static pressure that it can overcome at 790 cfm?

Thanks in advance.

Jay Chan

The flat paddle input fan that most DC systems use has to be probably the
most inefficient design out there especially when looking at early jet
engine inlet compressors [I am not talking about axial flow compressors].
mjh

"Jay Chan" wrote in message
om...
Does anyone have a copy of the fan performance curve of JET 1.5HP 1100
dust collector? If someone can give me a link to the fan curve, that
will be great. If a link is not available, I will be happy just to get
the following info:

- What's its CFM at 7.3" static pressure?

- What's the static pressure that it can overcome at 790 cfm?

Thanks in advance.

Jay Chan

"Mike Hide" wrote in message
news:Qf35c.12538$1p.233052@attbi_s54...
The flat paddle input fan that most DC systems use has to be probably the
most inefficient design out there especially when looking at early jet
engine inlet compressors [I am not talking about axial flow compressors].
mjh

That may be true but running chips through one of those more efficient air
compressors would surely result in instant compressor failure... chips and
tight tolerances don't go together. ;-)

I would partially agree with a not so robust unit if it were a single stage
unit.as a two stage unit definitely not....mjh



"John Grossbohlin" wrote in message
...

"Mike Hide" wrote in message
news:Qf35c.12538$1p.233052@attbi_s54...
The flat paddle input fan that most DC systems use has to be probably
the
most inefficient design out there especially when looking at early jet
engine inlet compressors [I am not talking about axial flow
compressors].
mjh

That may be true but running chips through one of those more efficient air
compressors would surely result in instant compressor failure... chips and
tight tolerances don't go together. ;-)