DIY Coolant Pump For Milling

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Subject Author Date
DIY Coolant Pump For Milling Bob La Londe 11-22-2008
Posted by Bob La Londe on November 22, 2008, 6:59 pm
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I've been playing with a Taig 2019 mini mill for a while now, and its fun,
but for hogging out any real amounts of metal I need to keep a constant
spray of oil on my cutter. WD-40 works pretty darn good. So far I have
just stood there metering WD-40 onto my cutter with a standard spray can,
but that is getting old. Especially on longer cuts.

I can buy it by the gallon for a pretty reasonable price, but still I hate
to just waste it, and of course I need a way to dispense it, and maybe to
recover it too. I was thinking to just weld up a big catch tray out of
aluminum to go under the mil. Drill a hole in one corner and put a pipe
down to a bucket to catch the oil, and then pump it back up to a nozzle on
the side of my cutting head. Here are my thoughts. Put a stainless screen
over the pan drain hole to keep the big pieces out of the bucket, and then
maybe under that in the top of the pipe loosely stuff in some cheese cloth
to filter out the smaller particles.

Then I need to figure out a good pump to use to bring the oil back out of
the bucket and to the nozzle at the cutting head. I was thinking a five
gallon utility bucket with the lid snapped on would be a good sump, but I
would like to leave it on the floor under my work bench so as to minimize
the chances of knocking it over and wasting 20-40 dollars worth of oil. Of
course I need a pump then that can lift the oil 3-4 feet safely and have
some decent pressure at the head to be able to spray chips off and keep the
cutting point cool. I figure a fuel pump might work, but I do not know if
it will have the volume or pressure to do the job. A water cooler pump
would have the volume, but maybe not the pressure, and I do not know if
those pumps are explosion proof since they are designed to work in a water
environment, not a flammable environment.

Suggestions? Last time I checked a generic electric fuel pump was about $40
retail.

P.S. The Taig specifically says not to use water based coolants.

Bob La Londe
www.YumaBassMan.com




Posted by Ignoramus20688 on November 22, 2008, 7:57 pm
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> Suggestions? Last time I checked a generic electric fuel pump was about $40
> retail.

A lot easier to buy a working coolant system on ebay. You can also
look into buying a misting cooler.

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Posted by Bob La Londe on November 22, 2008, 8:12 pm
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>> Suggestions? Last time I checked a generic electric fuel pump was about
>> $40
>> retail.
>
> A lot easier to buy a working coolant system on ebay. You can also
> look into buying a misting cooler.

Like this? http://tinyurl.com/5dlmzc

Looks nice, and I like the pneumatic for pressure. Would make it a lot
easier to get the pressure and volume you want, but it does nothing for
recovery. In fact by using a pressurized tank you would have to do recovery
as totally separate and non-automated process. I probably won't buy one,
but I may make one now that I have seen that. Maybe set up a recovery
reservoir with a float switch that does an auto shutdown when my recovery
reservoir gets to about 1/2 the capacity of the oiler. Then I'ld never run
out of oil if I walked in the office to get a soda and got distracted.

Mister? I guess you could do it with a venturi style pickup instead of a
pressurize tank, and then just play with your pickup and nozzle size to get
a nice spray.


>
> --
> Due to extreme spam originating from Google Groups, and their
> inattention
> to spammers, I and many others block all articles originating
> from Google Groups. If you want your postings to be seen by
> more readers you will need to find a different means of
> posting on Usenet.
> http://improve-usenet.org/


Posted by Ignoramus20688 on November 22, 2008, 8:27 pm
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>>> Suggestions? Last time I checked a generic electric fuel pump was about
>>> $40
>>> retail.
>>
>> A lot easier to buy a working coolant system on ebay. You can also
>> look into buying a misting cooler.
>
> Like this? http://tinyurl.com/5dlmzc

I was thinking along the lines of what I sold a while ago:

http://yabe.algebra.com/~ichudov/misc/ebay/Bridgeport-Mist-Coolant-Unit/

i

> Looks nice, and I like the pneumatic for pressure. Would make it a lot
> easier to get the pressure and volume you want, but it does nothing for
> recovery. In fact by using a pressurized tank you would have to do recovery
> as totally separate and non-automated process. I probably won't buy one,
> but I may make one now that I have seen that. Maybe set up a recovery
> reservoir with a float switch that does an auto shutdown when my recovery
> reservoir gets to about 1/2 the capacity of the oiler. Then I'ld never run
> out of oil if I walked in the office to get a soda and got distracted.
>
> Mister? I guess you could do it with a venturi style pickup instead of a
> pressurize tank, and then just play with your pickup and nozzle size to get
> a nice spray.
>
>
>>
>

--
Due to extreme spam originating from Google Groups, and their inattention
to spammers, I and many others block all articles originating
from Google Groups. If you want your postings to be seen by
more readers you will need to find a different means of
posting on Usenet.
http://improve-usenet.org/

Posted by Terry Coombs on November 22, 2008, 8:42 pm
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Bob La Londe wrote:
>>> Suggestions? Last time I checked a generic electric fuel pump was
>>> about $40
>>> retail.
>>
>> A lot easier to buy a working coolant system on ebay. You can also
>> look into buying a misting cooler.
>
> Like this? http://tinyurl.com/5dlmzc
>
> Looks nice, and I like the pneumatic for pressure. Would make it a
> lot easier to get the pressure and volume you want, but it does
> nothing for recovery. In fact by using a pressurized tank you would
> have to do recovery as totally separate and non-automated process. I
> probably won't buy one, but I may make one now that I have seen that.
> Maybe set up a recovery reservoir with a float switch that does an
> auto shutdown when my recovery reservoir gets to about 1/2 the
> capacity of the oiler. Then I'ld never run out of oil if I walked in
> the office to get a soda and got distracted.
> Mister? I guess you could do it with a venturi style pickup instead
> of a pressurize tank, and then just play with your pickup and nozzle
> size to get a nice spray.

I did some research , ended up designing and building a mister that uses a
pressurized supply . You CAN inject the used coolant back into the tank ,
just use a small orifice . Check out water injectors for steam boilers ,
some use a similar device .
The reason for pressurizing the supply is to help reduce water/coolant
vapor in the air . The air supply is at a lower pressure , therefore the
mist is of a "coarser" consistency . Larger "droplets" mean less
evapotation , and less moisture in the air .
The last thing I want around my machine tools is a moist environment .
--
Snag
sometimes ya gotta
shovel manure
to pay the bills



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