"Joe" <[email protected]> wrote in message
news:[email protected]...
> Anyone have experience with this model? Pro's?/con's?
>
> Harbor Freight is usually not my first choice, but I'm looking there now.
>
> vacuum pump model #98076-2vga. 2.5cfm, rotary-vane
>
> http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=98076
Have you tried Viagra?
B.
"Joe" <[email protected]> wrote in message
news:[email protected]...
>
> "Buddy Matlosz" <[email protected]> wrote in message
> news:[email protected]...
>>
>> "Joe" <[email protected]> wrote in message
>> news:[email protected]...
>>> Anyone have experience with this model? Pro's?/con's?
>>>
>>> Harbor Freight is usually not my first choice, but I'm looking there
>>> now.
>>>
>>> vacuum pump model #98076-2vga. 2.5cfm, rotary-vane
>>>
>>> http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=98076
>> Have you tried Viagra?
>>
>> B.
>>
> LOL. You're confusing function with size.
>
> Yeah, *this* isn't gonna start a whole new direction for the thread....
>
Well, you never did say what you were trying to accomplish...........
B.
On Sep 18, 12:16=A0pm, "Joe" <[email protected]> wrote:
> "notbob" <[email protected]> wrote in message
>
> news:[email protected]...
>
> > On 2009-09-18, Joe <[email protected]> wrote:
>
> >> Fair enough. =A0Veneering and holding small workpieces in place for
> >> production
> >> routing.
>
> > Pshaw! =A0Then you are wasting your money. =A0You'd be better off using=
an old
> > vacuum cleaner thru vacuum cleaner hose.
>
> > nb
>
> I might as well. =A0Ran it for 10 seconds and it started rattling and smo=
king.
> first and last tool I ever buy from HF.
Try one of these. (Btw.. the claim of 27"Hg is optimistic)
http://tinyurl.com/pgkqss
On Sep 16, 12:29=A0pm, "Joe" <[email protected]> wrote:
> Anyone have experience with this model? =A0Pro's?/con's?
>
> Harbor Freight is usually not my first choice, but I'm looking there now.
>
> vacuum pump model #98076-2vga. =A02.5cfm, rotary-vane
>
> http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=3D98076
That would seem to be for a low vacuum application:
Atmospheric pressure 760 torr 101.3 kPa
Low vacuum 760 to 25 torr 100 to 3 kPa
Medium vacuum 25 to 1=D710-3 torr 3 kPa to 100 mPa
High vacuum 1=D710-3 to 1=D710-9 torr 100 mPa to 100 nPa
Joe wrote:
> "notbob" <[email protected]> wrote in message
> news:[email protected]...
>> On 2009-09-18, Joe <[email protected]> wrote:
>>
>>> Fair enough. Veneering and holding small workpieces in place for
>>> production
>>> routing.
>> Pshaw! Then you are wasting your money. You'd be better off using an old
>> vacuum cleaner thru vacuum cleaner hose.
>>
>> nb
>
> I might as well. Ran it for 10 seconds and it started rattling and smoking.
> first and last tool I ever buy from HF.
>
>
>
Were you operating the pump with no load or connected to the intended
device?
I've rebuilt several direct and belt drive types. They can be a bit
noisy and smoky. Give it another try with the inlet completely blocked
(max load). Better yet, connect a vacuum gauge to the inlet and see what
its actually pulling.
John
"Mike Marlow" <[email protected]> wrote in message
news:[email protected]...
>
> "Joe" <[email protected]> wrote in message
> news:[email protected]...
>>
>> "notbob" <[email protected]> wrote in message
>> news:[email protected]...
>>> On 2009-09-18, Joe <[email protected]> wrote:
>>>
>>>> Fair enough. Veneering and holding small workpieces in place for
>>>> production
>>>> routing.
>>>
>>> Pshaw! Then you are wasting your money. You'd be better off using an
>>> old
>>> vacuum cleaner thru vacuum cleaner hose.
>>>
>>> nb
>>
>> I might as well. Ran it for 10 seconds and it started rattling and
>> smoking. first and last tool I ever buy from HF.
>>
>>
>>
>
> I don't want to sing the praises of HF, and there are indeed things in
> their store that I won't buy, but a great deal of what they sell is
> perfectly acceptable stuff. What would you have said if a brand name item
> from a major retailer failed like that in short order? It happens every
> day.
>
> --
>
> -Mike-
> [email protected]
And, to bolster your point, per another poster, the pump was actually
behaving the way it was supposed to. It was my fault for not knowing the
specifics of how that pump operates. Just frustration in the moment that
was talking there.
Live and learn.
jc
p.s. Any, yes, I did see some perfectly acceptable stuff in there as well,
just not the threaded plastic knobs for jigs and hold-downs that I was
looking for. Not their fault they don't carry them ;-)
"notbob" <[email protected]> wrote in message
news:[email protected]...
> On 2009-09-18, Joe <[email protected]> wrote:
>
>> Fair enough. Veneering and holding small workpieces in place for
>> production
>> routing.
>
> Pshaw! Then you are wasting your money. You'd be better off using an old
> vacuum cleaner thru vacuum cleaner hose.
>
> nb
I might as well. Ran it for 10 seconds and it started rattling and smoking.
first and last tool I ever buy from HF.
"Joe" <[email protected]> wrote in message
news:[email protected]...
>
> "notbob" <[email protected]> wrote in message
> news:[email protected]...
>> On 2009-09-18, Joe <[email protected]> wrote:
>>
>>> Fair enough. Veneering and holding small workpieces in place for
>>> production
>>> routing.
>>
>> Pshaw! Then you are wasting your money. You'd be better off using an
>> old
>> vacuum cleaner thru vacuum cleaner hose.
>>
>> nb
>
> I might as well. Ran it for 10 seconds and it started rattling and
> smoking. first and last tool I ever buy from HF.
>
>
>
I don't want to sing the praises of HF, and there are indeed things in their
store that I won't buy, but a great deal of what they sell is perfectly
acceptable stuff. What would you have said if a brand name item from a
major retailer failed like that in short order? It happens every day.
--
-Mike-
[email protected]
On Sep 18, 1:06=A0pm, Morris Dovey <[email protected]> wrote:
> Joe wrote:
> > Fair enough. =A0Veneering and holding small workpieces in place for pro=
duction
> > routing.
>
> I use a recycled refrigerator compressor with shop-built vacuum pucks
> for holding (not small) workpieces for CNC routing with a 5 hp spindle.
>
> The higher-volume shops like the vacuum pumps from
>
> =A0 =A0http://www.beckerpumps.com/
>
> They're more expensive but those who have 'em, love 'em.
Yup, those are 'drool-grade'.
Used ones are quite reasonable...and parts are available all over.
One day, dammit...
On Sep 18, 11:33=A0am, "Joe" <[email protected]> wrote:
> "Buddy Matlosz" <[email protected]> wrote in message
>
> news:[email protected]...
>
>
>
>
>
> > "Joe" <[email protected]> wrote in message
> >news:[email protected]...
>
> >> "Buddy Matlosz" <[email protected]> wrote in message
> >>news:[email protected]...
>
> >>> "Joe" <[email protected]> wrote in message
> >>>news:[email protected]...
> >>>> Anyone have experience with this model? =A0Pro's?/con's?
>
> >>>> Harbor Freight is usually not my first choice, but I'm looking there
> >>>> now.
>
> >>>> vacuum pump model #98076-2vga. =A02.5cfm, rotary-vane
>
> >>>>http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=3D98=
076
> >>> Have you tried Viagra?
>
> >>> B.
>
> >> LOL. =A0You're confusing function with size.
>
> >> Yeah, *this* isn't gonna start a whole new direction for the thread...=
.
>
> > Well, you never did say what you were trying to accomplish...........
>
> > B.
>
> Fair enough. =A0Veneering and holding small workpieces in place for produ=
ction
> routing.
That won't be enough vacuum IMHO.
On Sep 18, 12:16=A0pm, "Joe" <[email protected]> wrote:
> "notbob" <[email protected]> wrote in message
>
> news:[email protected]...
>
> > On 2009-09-18, Joe <[email protected]> wrote:
>
> >> Fair enough. =A0Veneering and holding small workpieces in place for
> >> production
> >> routing.
>
> > Pshaw! =A0Then you are wasting your money. =A0You'd be better off using=
an old
> > vacuum cleaner thru vacuum cleaner hose.
>
> > nb
>
> I might as well. =A0Ran it for 10 seconds and it started rattling and smo=
king.
> first and last tool I ever buy from HF.
Venturi based vacuum generators are cheap and reliable.
Joe wrote:
> Fair enough. Veneering and holding small workpieces in place for production
> routing.
I use a recycled refrigerator compressor with shop-built vacuum pucks
for holding (not small) workpieces for CNC routing with a 5 hp spindle.
The higher-volume shops like the vacuum pumps from
http://www.beckerpumps.com/
They're more expensive but those who have 'em, love 'em.
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
notbob wrote:
> On 2009-09-18, Morris Dovey <[email protected]> wrote:
>
>> http://www.beckerpumps.com/
>>
>> They're more expensive but those who have 'em, love 'em.
>
> You are paying insane amounts of money for vacuum overkill. A simple
> vacuum cleaner will provide all the vacuum mecessary for holding down
> verneer pieces, even lager ones. The mechanism at work here is not
> vacuum. but the air pressure acting on the pieces to be held. IOW,
> it's not the level or rate of vacuum, but the atmospheric pressure on
> the other side of the work. You can buy a $10 million dollar vacuum
> system, but the air pressure holding down the pieces will never exceed
> 14.7 psi.
I don't do veneering, so you won't get any argument from me in that context.
Joe mentioned production routing small parts - and in that context, the
choice of equipment will depend very much on the particular set-up
(whole table, with vacuum being pulled through a permeable spoilboard;
vacuum pucks on an impermeable spoilboard; or something in-between); the
material being routed - parameters will be very different for, say,
Lexan, baltic birch, and MDF workpieces; and how aggressive the feed is.
I've been pretty happy with pucks and an old recycled refrigerator
compressor - but I don't use vacuum hold down for parts under 16 in^2,
and I can't even consider vacuum hold-down for leaky materials like 1/4
in MDF. (If I really needed to do that I'd spring for a real vacuum pump
- probably a reconditioned Becker.)
I have a how-to for making inexpensive vacuum pucks at
http://www.iedu.com/DeSoto/Projects/VacuumPuck/ - I just daisy-chain 'em
together and connect to the intake side of the refrigerator compresor
with 3/8 in vinyl tubing.
For non-production (very small) quantities, I'm more likely to use
carpet tape - or for in-between (small) quantities, a purpose-built
clamping fixture like those shown at
http://www.iedu.com/DeSoto/Projects/Bevel/
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Robatoy wrote:
> On Sep 18, 1:06 pm, Morris Dovey <[email protected]> wrote:
>
>>Joe wrote:
>>
>>>Fair enough. Veneering and holding small workpieces in place for production
>>>routing.
>>
>>I use a recycled refrigerator compressor with shop-built vacuum pucks
>>for holding (not small) workpieces for CNC routing with a 5 hp spindle.
>>
>>The higher-volume shops like the vacuum pumps from
>>
>> http://www.beckerpumps.com/
>>
>>They're more expensive but those who have 'em, love 'em.
>
>
> Yup, those are 'drool-grade'.
> Used ones are quite reasonable...and parts are available all over.
> One day, dammit...
>
Bill Noble, one of the participants of rec.craft.woodturning, usually
has a few reconditioned Gast pumps on his web site at a decent price:
http://www.wbnoble.com/
Example:
"GAST 0523-IDQ-G21DX
220V, single phase, weighs 30 pounds
I measured 22 inches vacuum
Oilless carbon vane pump, if I read the spec sheet right, this is a 3.2
CFM free air flow pump, 10 psi max, 26 in vac max, so my 22 inch
measurement says it's in really good shape.
manual is here:
http://www.gastmfg.com/pdf/OM/23_series_oilless_om.pdf
$165."
--
Jack Novak
Buffalo, NY - USA
[email protected]
"Buddy Matlosz" <[email protected]> wrote in message
news:[email protected]...
>
> "Joe" <[email protected]> wrote in message
> news:[email protected]...
>>
>> "Buddy Matlosz" <[email protected]> wrote in message
>> news:[email protected]...
>>>
>>> "Joe" <[email protected]> wrote in message
>>> news:[email protected]...
>>>> Anyone have experience with this model? Pro's?/con's?
>>>>
>>>> Harbor Freight is usually not my first choice, but I'm looking there
>>>> now.
>>>>
>>>> vacuum pump model #98076-2vga. 2.5cfm, rotary-vane
>>>>
>>>> http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=98076
>>> Have you tried Viagra?
>>>
>>> B.
>>>
>> LOL. You're confusing function with size.
>>
>> Yeah, *this* isn't gonna start a whole new direction for the thread....
>>
> Well, you never did say what you were trying to accomplish...........
>
> B.
>
Fair enough. Veneering and holding small workpieces in place for production
routing.
"Buddy Matlosz" <[email protected]> wrote in message
news:[email protected]...
>
> "Joe" <[email protected]> wrote in message
> news:[email protected]...
>> Anyone have experience with this model? Pro's?/con's?
>>
>> Harbor Freight is usually not my first choice, but I'm looking there now.
>>
>> vacuum pump model #98076-2vga. 2.5cfm, rotary-vane
>>
>> http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=98076
> Have you tried Viagra?
>
> B.
>
LOL. You're confusing function with size.
Yeah, *this* isn't gonna start a whole new direction for the thread....
On 2009-09-16, Joe <[email protected]> wrote:
> Harbor Freight is usually not my first choice, but I'm looking there now.
I'd go for it. Rotary vane pumps aren't rocket science. I doubt it
would pull 75 microns, but it should do what it was intended to, pull
moisture out of refrigeration lines. Just keep the oil fresh. Better
yet, invest in some high grade vac pump oil. If you can replace the
1/4" fitting with 3/8" and use corresponding sized hose, that would
work better. Besides, the worst you can say about it is, "it sucks".
nb
On 2009-09-18, Joe <[email protected]> wrote:
> Fair enough. Veneering and holding small workpieces in place for production
> routing.
Pshaw! Then you are wasting your money. You'd be better off using an old
vacuum cleaner thru vacuum cleaner hose.
nb
On 2009-09-18, Joe <[email protected]> wrote:
> I might as well. Ran it for 10 seconds and it started rattling and smoking.
> first and last tool I ever buy from HF.
That's what rotary vane pumps do when they've pulled a vacuum. The
smoking is oil vapor backstreaming. You should have said what you were
going to use it for in the first place. I thought you were going to
use it for pumping down refrigeration lines, its intended purpose.
Maybe HF will take it back. Tell 'em you didn't know about
backstreaming and can't tolerate any oil on the work.
nb
On 2009-09-18, Morris Dovey <[email protected]> wrote:
> http://www.beckerpumps.com/
>
> They're more expensive but those who have 'em, love 'em.
You are paying insane amounts of money for vacuum overkill. A simple
vacuum cleaner will provide all the vacuum mecessary for holding down
verneer pieces, even lager ones. The mechanism at work here is not
vacuum. but the air pressure acting on the pieces to be held. IOW,
it's not the level or rate of vacuum, but the atmospheric pressure on
the other side of the work. You can buy a $10 million dollar vacuum
system, but the air pressure holding down the pieces will never exceed
14.7 psi.
nb