[HELP] Looking for DC motor

Discussion in 'General Off-Topic Chat' started by Ryubot, Sep 22, 2013.

  1. Ryubot

    Ryubot Member

    Sep 22, 2013
    I am looking for a DC motor with very specific specs I hope I could get some help here on the GBAtemp forums. I am new here so I am sorry if this is not the right place to post.

    DC Motor specs:
    - between 6 and 12 Volt
    - 300+ rpm
    - stall torque 100+ oz*in
    - operating at max 12 Ampere
    - weight as low as possible not more than 100gram

    I hope I get some good options.
    Thanks in advance.
  2. FAST6191

    FAST6191 Techromancer

    pip Reporter
    Nov 21, 2005
    United Kingdom
    Though I know we count several electrical engineers of various stripes and similarly skilled people among our ranks I do have to wonder if we got linked up on some electronics site/forum somewhere.

    100+ oz*in
    Imperial units in this day and age.... bad form. In real units that would seem to be 0.7061552 Nm (or at least according to http://www.unitconversion.org/unit_converter/torque.html ).

    Judging by your lack of any restrictions other than those posted I assume you just want a dumb DC motor -- no steppers, internal speed controls, reversible/direction change options.... Though hopefully you would not be adverse to having a three pin one (power, ground and go) or something that is not quite the classic two pin motor, if possible I will try to spare you the multi pin or something like a squirrel cage (Kooianker?). I guess it goes without saying as well that you do not want to have to have another motor to start it or bring it up to speed.
    "operating at max 12A" It might not come to pass but can I have a starting load as more than that?

    The obvious starting point is a parametric search on somewhere like http://www.digikey.nl/ or http://nl.rs-online.com/web/
    Neither allow for weight in their parametric searches which is annoying. Likewise I have not needed any specific electromechanicals I can not order by part number in some time (everything else I just pull out of my box of salvage and junk) so I have not got any truly good/hidden/only known to those in the trade sources and plugging in various things from your list I did not get far as far as getting your specs at the shaft, though everything roughly appropriate seems to measure its output in mNm or Ncm which is a sign this is going to be fun.
    If weight is an issue I guess you do not want to convert it, though http://www.digikey.nl/product-detail/en/808050X07.66Z/808050X07.66Z-ND/2467164 seems designed to use a gearbox and might just fulfil your requirements (though at 96 grams for the lesser motors the gearbox would probably tip it over the edge on weight, 100 grams is pretty killer though).
    http://nl.rs-online.com/web/p/dc-motors/4204997/ does slightly better.

    I sense I am wasting both of our times so I will leave it at this for the time being.
  3. Ryubot

    Ryubot Member

    Sep 22, 2013
    Thanks for your reply. I found a nice motor on one of the sites you linked.
    And you didn't waste my time at all, I am sorry if you did.