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  • Coolant pump...

    Hi all,

    i want to make a portable coolant system, ive got the tank and piping. I tend to use water soluble coolant.

    Does the pump have to be the usual metal built unit or could i use say a small submersible pond pump?

    Any other ideas?

    Thanks in advance.

    Dave
    If it does'nt fit, hit it.
    https://ddmetalproducts.co.uk
    http://www.davekearley.co.uk

  • #2
    Originally posted by Davek0974
    Hi all,

    i want to make a portable coolant system, ive got the tank and piping. I tend to use water soluble coolant.

    Does the pump have to be the usual metal built unit or could i use say a small submersible pond pump?

    Any other ideas?

    Thanks in advance.

    Dave
    Any pump thats comfortable pumping both oil & water with small abrasive solids and can generate a few feet of head with a reasonable flow.. A lot of submersible pond pumps woulld fit that bill.
    - Warning - Small pumps often require a significant flow to cool the motor.
    Coolant situations are often - low to no flow. This can burn your motor out.

    However if you have a constant return to the tank (bypass) so you can't have low-zero flow through the pump you can both keep the pump cool and turn it into an advantage by using the return to aerate the coolant.

    Comment


    • #3
      Ok, i'll give it a go.

      I've read before about aerating the coolant, what does that do??

      Dave
      If it does'nt fit, hit it.
      https://ddmetalproducts.co.uk
      http://www.davekearley.co.uk

      Comment


      • #4
        IIRC it helps to stop the anaerobic bacteria from turning your suds into stinky HSE swallowing goo.
        A tramp oil skimmer is probably a good idea as well.

        Dave

        (Who has yet to get round to setting up proper coolant...)

        Comment


        • #5
          Throwing next doors cat in also aerates the coolant as well and uses less electric..........

          .[edit]

          Once built a big grinder that reground spherical balls out of those 1/4 turn valves mind you this puppy was 1.4 metres in diameter, 55" to those that have trouble reading English posts from the UK [ not the EU ]

          We threw two of those Hippo ™ plastic submersible pumps in the bottom of the 60 gallon coolant tank and fed them to the two work heads on 1 " bore pipe.

          Running on 240 volts, completely covered in coolant, ran flawlessly for the 3 weeks it was on test and is probably still running out in the Russian oil fields.
          Last edited by John Stevenson; 08-12-2009, 04:41 PM.
          .

          Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.



          Comment


          • #6
            Typical submersible pond pumps have a magnet for a rotor exposed to the water. If you are dealing with small ferrous fines then they will jam up the pump. Use a shaft drive pump that has an oil immersed motor.

            Comment


            • #7
              "Once built a big grinder that reground spherical balls out of those 1/4 turn valves"

              Aren't balls usually spherical? What with your English posts and all, I don't want to be too North American

              Comment


              • #8
                Any Fractional HP (1/8 - 1/2) Impeller type pump will be fine - lets not over think the thing here. The only thing you'll want to keep in mind is the amount of "Lift" and you'll have to most likely refer to the manufacture's website for those specs

                http://cgi.ebay.com/BRAND-NEW-MARCH-...d=p3286.c0.m14

                I've built several coolant tank/pump set ups for my machines. As long as the tank has a baffle section to separate out the goop they will last years and years even in the worst environment such as on a Grinder with all its fine metallic particulates.

                If you must try using 3M Blitz cloth for a screen/filter
                Last edited by JoeFin; 08-12-2009, 10:45 PM.

                Comment


                • #9
                  Pump: How about an oil pump from a car? I have used this style from a chev. It has a screen built in. Hook it up to a small variable rpm drill with a pipe and hose attached to the outlet. That way you get the pressure you want. Plus, if you want, add an oil filter such as used on kerosene oil stoves. These filters are cheap and plentiful. wayne.

                  Comment


                  • #10
                    Several years ago, we retrofitted an old surface grinder with a makeshift coolant system, using a 700 GPH submersible Pondmaster pump.

                    We used two Rubbermaid "Ruffneck" 18 gallon tubs. The bottom tub contained the coolant and the pump, while the top tub (with holes drilled through the bottom) contained filter material to remove the grinding swarf from the returning coolant. Never had any problems.

                    Comment


                    • #11
                      Thanks all, good stuff there

                      i'll fit a weir to trap the crap and go with a cheapo pump to start with.

                      Thanks

                      Dave
                      If it does'nt fit, hit it.
                      https://ddmetalproducts.co.uk
                      http://www.davekearley.co.uk

                      Comment


                      • #12
                        If all balls were spherical Millwrong it would certainly screw the Rose Bowl game. Make a bugger of the RL final as well.

                        Regards Ian.
                        You might not like what I say,but that doesn't mean I'm wrong.

                        Comment


                        • #13
                          Worth knowing

                          Ian, I had to smile at the "Rugby Ball" bit.

                          There is an urban myth (old) that says the the boys were playing foot-ball (no - real foot-ball = aka soccer) on the playing fields of Ruby (famous English Public School) and one shy, hesitant lad had the ball - in his hands (mortal sin!!) with the pack thundering toward him. He was terrified, rooted to the spot with fear, and in a trembling soto voce asked the coach "Please Sir, what do I do with this (round) ball?".

                          To which the coach appropriately responded.

                          And that Ladeez 'n Gennul'm'n is why a Rugby (foot) ball is generally oval in shape with points on both ends.

                          I thought you'd like to know that.

                          Comment


                          • #14
                            Originally posted by Davek0974
                            Thanks all, good stuff there

                            i'll fit a weir to trap the crap and go with a cheapo pump to start with.

                            Thanks

                            Dave
                            A big magnet in the bucket works wonders on steel/iron swarf/grit.

                            Comment


                            • #15
                              Yes a garden pump does fine.
                              It is built for running long hours, and as long as you keep the chips out, it works, and will continue for many years.
                              Check here for some tips in a previous post with photos
                              http://bbs.homeshopmachinist.net/showthread.php?t=35465

                              one of the secrets is using women's nylon stockings (their called "knee highs")for filters.
                              I can buy 10 pair for 3 dollars at Walmart
                              they are tough and fine.
                              Stick the pump itself in a very small plastic bowl, inside the 6 gallon pail.
                              that way it does not pick up fines off the bottom. Fluid level must be higher obviously. I keep it at least 50mm (2") above the edge of the bowl, when the system is running.
                              With a 6 foot head , I still need to throttle volume down using one 3/8" snap-loc coolant system

                              Rich

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