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Identify a trimmer

Discussion in 'Datasheets, Manuals and Component Identification' started by Edugimeno, Apr 16, 2017.

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  1. Edugimeno

    Edugimeno

    14
    1
    Jan 29, 2017
    Hi there.
    It should be an easy question but I'm struggling to identify (so I can order a similar one) trimmer.
    Its is horizontal 15mm diameter 10K trimmer. The board where it belongs is the main control board for a home/water heater system. I had a bucket with chlorine right underneath this heater and when it had a water leak, the gasses from the chlorine rusted everything in this thing. I repaired all the parts but the temperature control is acting up. I measured the resistance at this trimmer (temp control) and it goes up and down all over the place so it proves to be affected as well.

    Now I need to find a replacement, but I don't really know the nomenclature used to refer to these trimmers.
    The key thing is the (aparently special) shaft hole, which as you can see has like an M shaped opening, and also I can't find if its linear or log.

    Markings are:
    Front: Piher Spain
    Side: 10K 424 ME

    Anyone can point to any valid replacement for it that uses the same shaft shape?

    Thank you!
     

    Attached Files:

  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    It will be linear, and the hole is "x" shaped.

    Unless something mates with this trimpot, the shape of the hole is insignificant as long as you have a screwdriver with which to make the adjustment.
     
  3. Edugimeno

    Edugimeno

    14
    1
    Jan 29, 2017
    Well first of all thanks for your reply.
    Yes I was guessing it would be linear, I think log pots are only for audio equipment.
    But the shape is not X at all (I have it here in front of me), it is like a square with a notch entering at one side. (see attached)
    And actually the shape matters as there is an external control (dial) connected to it by a plastic shaft to adjust the desired temperature.
    I guess I can always make if fit somehow...

    Thanks!
     

    Attached Files:

  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,448
    2,809
    Jan 21, 2010
    Seeing it in close-up now, I see what you mean.

    It is likely a custom part or one made in very small quantities and not stocked by places like digikey. If it is available, you might have to purchase a minimum quantity (which might be a huge number)

    The manufacturers name is clearly visible, I would probably try reaching out to them. If you're really lucky you might find someone who will send you a "sample" -- they would almost certainly be unable to handle an order for 1 unit. (Or they might be able to point you to someone who has them for individual sale)
     
  5. 73's de Edd

    73's de Edd

    2,990
    1,261
    Aug 21, 2015
    Sir Edugimeno. . . . .


    I see board builds that use that PIHER brand trim pots that have made it 15000 mile across the waters to us. So it seems likely that YOU are right at their doorsteps, where you are.

    Your rotor hole seems to be either the R or B option on page 40.

    The real kicker might be a minimum order aspect, in which case you have to get the easier X or screwdriver slot options and hope that you will then be able to file enough of the old shaft away, for it to then be a trued and symmetrical screwdriver shaft of the existing shaft, such that it will not bind.


    PIHER SHEET :

    http://www.mouser.com/ds/2/325/12-PT10v03-6148.pdf



    73’s de Edd
     
  6. Edugimeno

    Edugimeno

    14
    1
    Jan 29, 2017
    Thanks Steve and Edd for your replies.
    My trimmer is 15mm in diameter so I guess there would be a PT-15 series instead of this PT-10 series one linked above.
    If funny but none of those rotos match mine....It should have an indent INWARDS in one side.
    I guess I will order jut any generic horizontal 10K 15mm trimmer and make it fit YES or YES lol, provided how hard it looks it's going to be, in the case I end up finding a provider, to get just one sample from them

    Thanks everyone here for their time!!
     
  7. Edugimeno

    Edugimeno

    14
    1
    Jan 29, 2017
    Oh by the way, I just tried to find the corresponding catalogue for 15mm and found it here:
    http://www.mouser.com/ds/2/325/14-PT15v03-7050.pdf
    and it DOES have one rotor that matches mine! (page 51, rotor F)
    I will give it a try...!

    Thanks again!
     
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