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Thread: Home built flood coolant for bench top mills

  1. #1
    tired of idiots vz58's Avatar
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    Default Home built flood coolant for bench top mills

    Ok here is my homemade coolant flood system. Its cheap and makes a simply amazing difference in feed rates and tool life.
    This is on the head. Initially I just used one of those gray barb fittings from lowes but upgraded to the flexie stuff. Both work great. You can also see my DIY DRO for the z axis, ($9)
    the vinyl tube ($2) runs down behind the mill to the pump in the bucket.








    .

    Heres the cheapo boat bulkhead barb ($5) through the HVAC pan. ($18)







    this is looking under the table at the coolant return through the bulkhead fitting, a short section of vinyl is attached to minimize splashing ($1)


    This is looking into the 5 gallon bucket that houses a magnet laying on the bottom ($1) to attract small metal pieces.
    Also you can see the pumps tube coming up, just suspend the pump 1/3 of the way up to keep the metal frags away from the inlet. I used a spare aquarium pump. The cheapest at walmart will do ($12)
    Scummy looking huh anyone thirsty? I ran the power cord up to a power strip that turns the pump on or off. When on you cannot see the tool cutting but the chips FLOAT up and away, fall into the pan where they sink onto the bottom of the pan. From there periodically I collect them with a magnet and dispose of them.



    I hope this is clearer than my verbal explainations have been.

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    Happy Camper hcpookie's Avatar
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    I like this. A lot. I have all sorts of those 5-gallon buckets from my wife's work, so I could do a bucket drop like that no problem.

    Is the $5 HVAC tray larger, or smaller, than a washing machine tray?
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    tired of idiots vz58's Avatar
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    The hvac pan was $18 and is much larger than a washing machine pan. They were out of stock on the biggest so mine is mid sized. Run the table all the way to one side, add 10-12" then run all the way the opposite and add 10-12" this is how wide you need. Conversly I have seen kennel trays at walmart that are about this big but the lip is kinda small.

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    Chief Administrator 7.62x39's Avatar
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    This is what I used for a pan. IIRC it is about 40"X30"
    ATP Extra Large Oil Drip Pan: Automotive : Walmart.com

    You can see it in post #36 in this thread.
    http://www.gunco.net/forums/f183/sie...ni-mill-71891/
    .

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    aka: SDK1968 dutigaf's Avatar
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    how did a spammer get 105 posts? he must have been super busy....

    but this thread is a great example of how to make your own fluid cooling system.
    say what you mean & mean what you say


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    Always sore, always tired Bradrock's Avatar
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    Mine has a mist tip & I use air to siphon the coolant out of the bottle

    " Save a tree...........Eat A Beaver!"

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    gunco irregular moleman's Avatar
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    I have the same mill as VZ58. I drilled and tapped the left pocket on the table for a drain tube that goes into the bucket. I still don't have a tray under the mill, but not much coolant makes it off of the vise or table. What does can be cleaned up with a shop rag when I'm done. I plan on hooking the other end of the table up with a drain tube and putting a catch tray under it for easier cleanup. Having the flood coolant has really helped with end mill life. I wish I would of done this sooner.

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    Happy Camper hcpookie's Avatar
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    Doesn't flow I set mine up using the aquarium pump I got from Home Depot a while back. Whatever they cost - I want to say it was $15?

    I'm using antifreeze for now because frankly that's what I had available in the shop. Now if I hold the bucket up closer it seems that it wants to pull the liquid up but I am talking "right under" the tray, and then only a trickle. Am I simply using the wrong liquid or is my pump not up the challenge?

    I'm wondering about the tube size, which to me seems rather large. Thinking the pump may not be able to move that amount of liquid. It IS using the correct ID tubing for the pump... since the tubing kind of presses on there doesn't seem to be a good way to change the tubing size. Perhaps there's a way to reduce the size of the tube? Some sort of reducing sleeve perhaps? I think perhaps that a smaller ID tube would work better.
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    gunco irregular moleman's Avatar
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    Pookie, I first started out with a smaller $10 unit from HF. It would only pump the fluid up about 3 foot. So that's where I had the bucket. I recently switched it for a larger $25 home depot pond pump. I had to put in a "T" section with a valve to bleed off some fluid and lower the pressure as I had already set the pump on minimum. With the bucket on the floor the pump is lifting the coolant up about 4 1/2 to 5 feet and it is rated for 6 foot. The coolant I'm using is about 3/5 water so I'd think the weights would be in the ballpark. I also wrapped the pump up in a red shop rag and zip tied it in place. That, along with a big magnet should help keep most of the chips out of the pump.
    Last edited by moleman; 10-18-2013 at 04:39 PM. Reason: add

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    tired of idiots vz58's Avatar
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    The large diameter of the tube is not important. It could be a swimming pool above it. The only thing that matters is "Head Pressure" that is the height of the surface of the collection buckets fluid and the outlet of the tubes height. (yes you have to consider the highest point of the tube but only until the fluid passes it and then that portion is in effect a siphon).

    Get a bugger pump.

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