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Putting a cord on a cordless drill - How??

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  • Putting a cord on a cordless drill - How??

    The title doesn't quite explain what I want to do. I have a project for which the low speed, high torque of a cordless drill would be a ideal inexpensive power source. But, I need it to be turned on and off automatically for set times with AC controls. Please forgive me for being a bit dull on the electrical side of things but can you clip wires from the battery charger to the battery plugs on the drill without it being a hazard?

    Other than that is there another source for a inexpensive DC motor would be more satisfactory. The power supplied by a cheap drill would be enough.

    Thanks,

    Doug

  • #2
    Only real problem with the battery charger is that at switch on the voltage will be far in excess of 12volts, you will need something in between like a battery.
    Run the drill off a car battery.

    Peter
    I have tools I don't know how to use!!

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    • #3
      most cordless tool battery chargers are made to charge batteries and as such have a lot of circuitry that senses the temp and charge of the pack. this will make them unusable for your application. if it is a 12 volt i would use a cheap car battery charger or any other dc power supply. you may also be able to strip the controller from the drill battery charger and just use the transformer and rectifier from it.

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      • #4
        If you are talking about using the charger that came with the drill it will not supply the current needed to RUN the drill.

        If it were me I would figure out a way the remote the battery and put a switch in one of the two wires running between the battery and the drill.

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        • #5
          I thought about using a 12v drill and attaching a 8 foot cord on it, and attaching a motorcycle battery or non-spillable gel cell. That way, it is still portable for locations without power, and the bigger battery should provide some impressive run time.
          I also thought of doing the same thing to my Canon digital camera that eats AA batteries. Make a plug-in cord and connect it to a pack of D cells or a 6v lantern battery.

          --Doozer
          DZER

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          • #6
            Originally posted by mcskipper
            If you are talking about using the charger that came with the drill it will not supply the current needed to RUN the drill.

            If it were me I would figure out a way the remote the battery and put a switch in one of the two wires running between the battery and the drill.

            Thanks guys for the quick replies, maybe I should be more clear on how this is going to be used. This will be part of an automated system that will be in operation 365 days a year for maybe 5 minutes a day when I would not be present to observe it's operation. Any use of a battery would not be ideal because they would run and switching batteries would not be acceptable. At some times of the year it will be cold and damp so it is must be housed in a protective box so dust and moisture are excluded.

            Am I correct then in understanding that I could by a 12 volt drill and run it off a 12 volt trickle charger?

            Doug

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            • #7
              I sometimes run my 12v drill off a 12v bcar battery charger. Works fine.

              Do that, and add one of those appliance timer gizmos at the wall outlet. You know, the kind you use to turn lights off / on when you're away from home.

              Ten-twenty bux and you're done.

              .

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              • #8
                Your problem is the amount of current the drill will take, a trickle charger by its nature will only supply a limited current and voltage so as not to overcharge the battery.
                A switched mode 12 volt supply is the best you could hope for, you really need to get some idea on the current required.
                Bench power supplies capable of supplying several amps are costly.
                How about a mains powered slow drill/mixer.

                Peter
                I have tools I don't know how to use!!

                Comment


                • #9
                  Sir,

                  A trickle charger supplies only a small amount current whereas the cordless drill needs a lot of current from the battery when it is driving a high load. Therefore a battery would be needed to supply the high, short term current.
                  Rather than go through using a cordless drill plus a battery plus a charger all fastened together, maybe you should consider a 115VAC drive such as a 1/2 inch 115V drill. It will supply the torque and it sounds like you DO have the 115V available.

                  Have I missed anything here?

                  Regards,
                  Jack C.

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                  • #10
                    If there is an outlet close enough to plug a charger in why not use a normal 110V drill with a timer?
                    Andy

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                    • #11
                      A battery charger will work. The only drill I am familiar with is Makita. You have to watch the polarity. It can never be reversed unless you bypass the trigger and wire directly to the motor or to the forward reverse switch. Makitas have a very sophisticated speed control that cannot be hooked up backwards. I am picking used ones without batteries for under $10.

                      A trickle charger won't work, I would use a cheap battery charger, 6 amps or more.
                      Gene

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                      • #12
                        [QUOTE=jcc3inc]Sir,

                        Rather than go through using a cordless drill plus a battery plus a charger all fastened together, maybe you should consider a 115VAC drive such as a 1/2 inch 115V drill. It will supply the torque and it sounds like you DO have the 115V available.

                        Have I missed anything here?


                        You are not!

                        I think you are right what I really should be doing is buying a 115V low rpm drill/mixer as ptjw7uk suggests.

                        This is part of a fairly sophisticated computer controlled automated system so timers are not the issue. Just finding the most trouble free way to drive a small metering device.

                        Doug

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                        • #13
                          What about some of the 120VAC gear reduction motors from places like www.surpluscenter.com I don't know what your RPM requirements are but motors such as these are plenty cheap.

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                          • #14
                            Originally posted by Mosside
                            This will be part of an automated system that will be in operation 365 days a year for maybe 5 minutes a day when I would not be present to observe it's operation. Any use of a battery would not be ideal because they would run and switching batteries would not be acceptable. At some times of the year it will be cold and damp so it is must be housed in a protective box so dust and moisture are excluded.
                            Then why not go with a conventional 120 volt drill?

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                            • #15
                              Originally posted by arcs_n_sparks
                              Then why not go with a conventional 120 volt drill?


                              That is a stellar idea! I am surprised no one mentioned that!
                              Andy

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