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Technical 6 Volt heater fan on 12 volt

Discussion in 'The Hokey Ass Message Board' started by Sporty45, Oct 19, 2020.

  1. Sporty45
    Joined: Jun 1, 2015
    Posts: 1,038

    Sporty45
    Member
    from NH Boonies

    I'll get some pics shortly, thanks :cool:
    What I can tell you is the diameter of the motor is 3" and length of motor casing is about 3 5/16" and shaft diameter is 1/4"
     
  2. Boryca
    Joined: Jul 18, 2011
    Posts: 703

    Boryca
    ALLIANCE MEMBER
    from Detroit

    I used one of these switches that provides two positions - full 12v in first position, 6v in second. Since you pull through the 12v first, it allows the motor to start without hanging up and allows you to go to 6v without issue. Running over a year now with lots of use, though it's not the aesthetic for everyone.

    Available other places than ebay, that was just the first one that came up.

    https://www.ebay.com/itm/Push-Pull-...tom-Truck-Boat-Off-Low-High-rat-/292673327968
     
    Sporty45 likes this.
  3. Budget36
    Joined: Nov 29, 2014
    Posts: 8,384

    Budget36
    ALLIANCE MEMBER

    I just went and looked for mine, might have tossed it. As I recall the end to end on the shafts were around 8-10 inches, motor about the same as yours. I don’t recall the shaft diameter. But if it would fit just use the squirrel cages off of it. I do recall the cages being plastic
     
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  4. Sporty45
    Joined: Jun 1, 2015
    Posts: 1,038

    Sporty45
    Member
    from NH Boonies

    Thanks, but both 6 volt motors I have don't work anyway, that's why I'm looking at new 12 volt motors now. ;)
     
  5. Sporty45
    Joined: Jun 1, 2015
    Posts: 1,038

    Sporty45
    Member
    from NH Boonies

    Oh well, I'll keep searching. I'm not worried about the cages, I can always bore the ones I have to fit the motor shaft.
     
  6. Sporty45
    Joined: Jun 1, 2015
    Posts: 1,038

    Sporty45
    Member
    from NH Boonies

    Here's a pic of the motor in question. The shafts stick out 1". I threw a pair of glasses in the pic just to get a feeling for the size

    20201021_142810.jpg
     
    jim snow likes this.
  7. Budget36
    Joined: Nov 29, 2014
    Posts: 8,384

    Budget36
    ALLIANCE MEMBER

    Oh heck, you’d have to cut the shafts down on the one I had used. Might still be an alternative tho
     
  8. Sporty45
    Joined: Jun 1, 2015
    Posts: 1,038

    Sporty45
    Member
    from NH Boonies

    Yeah, cutting down the shafts wouldn't be a problem. The biggest issue is the size of the motor, there isn't much room for anything too large. I have some leeway, but not a ton!
     
  9. Bob Lowry
    Joined: Jan 19, 2020
    Posts: 911

    Bob Lowry

    Sporty45 likes this.
  10. Sporty45
    Joined: Jun 1, 2015
    Posts: 1,038

    Sporty45
    Member
    from NH Boonies

    Yup, I saw that one. The biggest problem I'm running into is the length of the motor body, the ones that look promising turn out to be too long. Right now I'm looking at a motor for a 65-66 mustang. It looks like it will work. The wiring will have to be figured out on it though.

    https://www.ebay.com/itm/3-Speed-Bl...a=1&pg=2334524&_trksid=p2334524.c100667.m2042
     
  11. flynbrian48
    Joined: Mar 10, 2008
    Posts: 7,348

    flynbrian48
    Member

    I did an "Amazon" search and found a 30 Amp, 12V to 6V reducer for the wiper motor in my '52 DeSoto. Works great, the motor runs at the right speed low and high. It was about $30, I don't know the brand. I've run 6V heaters in several cars on 12V, they seem to last but of course run fast, and the fan gets pretty loud. The one in my Diamond T has been working great for 7 years.
     
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  12. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,613

    Rusty O'Toole
    Member

    How about a zener diode?
     
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  13. wulf powis
    Joined: Jun 19, 2017
    Posts: 64

    wulf powis
    Member

    Dual Shaft blower motor,3 Speed,4 Wire, Body 3" DIA x 3" L (3.5 with bearing cap), 5/16 X 2 7/8 Shaft, 12 Volt. many applications.
    try acme air parts should be something that works for you at
    ACMEAIRPARTS.COM
    Acme Air Parts 4100010
     
    Sporty45 likes this.
  14. wulf powis
    Joined: Jun 19, 2017
    Posts: 64

    wulf powis
    Member

  15. Sporty45
    Joined: Jun 1, 2015
    Posts: 1,038

    Sporty45
    Member
    from NH Boonies

    Thanks everyone. I ordered the one I linked to from ebay. Even comes with the switch, so it shouldn't be too hard to figure out wiring.
     
  16. Sporty45
    Joined: Jun 1, 2015
    Posts: 1,038

    Sporty45
    Member
    from NH Boonies

    Wulf, this is pretty much the same as the one I ordered off ebay, but the one on ebay had the switch, should make it easier to figure out ;)
     
  17. sunbeam
    Joined: Oct 22, 2010
    Posts: 5,596

    sunbeam
    Member

    Most cars have a speed resistor in the air flow of the unit usally for 3 speeds low or medium setting should work
     
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  18. G-son
    Joined: Dec 19, 2012
    Posts: 933

    G-son
    Member
    from Sweden

    Zener diodes can be good for dropping voltage, however in a case like this you will have about as much power loss in the zener as the fan consumes. Zener diodes that can handle high power are quite expensive.
     
    Sporty45 and TrailerTrashToo like this.
  19. wulf powis
    Joined: Jun 19, 2017
    Posts: 64

    wulf powis
    Member

    Just makes it more special then, glad you found one!
     
    Sporty45 likes this.

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