Retrofitting a spindle chiller onto a Fadal VMC15 - Page 2
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  1. #21
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    https://ebay.us/TMaHxQ

    $240 and 300% less mickey mouse

  2. #22
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    Quote Originally Posted by GENERALDISARRAY View Post
    https://ebay.us/TMaHxQ

    $240 and 300% less mickey mouse
    That makes sense.. Chiller off a Japanese machine. Most likely running velocite.

    Probably has a pump in it with the life expectancy of Betty White, not a Soda
    fountain pump.

    The only thing that scares me on that one.. "Works GREAT".. Sold AS-IS.. No returns,
    and you have to arrange the shipping, which is a pain in the ass... And then that
    customs BS to get it into Canada..

    Complete opposite of a Fadal.. The machine is dead and gone, but the chiller still works...

  3. #23
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    Aaron, this is what I have, I feed into the lower port and out the upper port.

    0924191459_hdrs.jpg
    0924191459s.jpg

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  5. #24
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    https://www.amazon.ca/Chiller-Daddy-...9363854&sr=8-6

    Id be tempted to try this. Same idea as what fadal used. Nice and compact. Brand new and free shipping to Canada for a good price. Fadals cooler was 1/5th hp, this says 140 watts, not too far off if specs are accurate.

    You need to have a temperature difference for a radiator to work, it wont do anything until the spindle has already warmed up and shifted Z height. Its better for keeping warm things like engines and tig torches from getting way too hot. If you want to maintain ambient temperature, and Z height, you will be better off with a proper refrigeration unit.

    The Daiken unit looks good too. A little bulky, and its 3 phase. The original fadal system is designed to use 120v single phase if your planning on using original controls.

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    My solution is a period correct replacement for the "Prestone can" cooler it would have had from the factory. I don't have chilled screws, so only the spindle heat is being transferred to the cooler assembly. A couple degrees above ambient would be a stellar result. If I want a chiller, I could just put my tank inside a mini-fridge.

    The purpose of the chiller is to remove the heat put into the system by friction, if the chiller cools below ambient, then you have an opposite situation that the screws shrink and spindle bearings won't be at proper clearance.

    Remember, bearings are assembled so that they reach running clearances at operating temperature.

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    The oil is just a better all around solution. All my mills have oil chilled spindles and one has the spindle motor on it's own cooler circuit too. It just works and there's no nasty mess or surprises when you have to work on something.

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  9. #27
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    Quote Originally Posted by Perry Harrington View Post
    Aaron, this is what I have, I feed into the lower port and out the upper port.

    0924191459_hdrs.jpg
    0924191459s.jpg
    Perry! Thanks for posting that mate! I found some photos of 'cool power' fadals yesterday which showed plumbing going into the same spot on the spindle, so between your picture and the stuff online I'm fairly confident that port is supposed to be used for coolant Thanks again!

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    For future reference for myself, and for anyone else thinking about retrofitting a spindle cooler onto a Fadal, here are some useful part numbers:

    The o-ring that goes around the lower end of the spindle before it's fitted into the casting is McMaster part no: 9452K321 (McMaster-Carr)

    The o-rings for sealing the top end of the spindle are:
    Small - McMaster part num: 9452K23 (McMaster-Carr)
    Large - McMaster part num: 9452K195 (McMaster-Carr)

    The fitting I'm using for the spindle nose inlet is a 90º elbow with 1/4" NPT on one leg and 1/2" push to connect on the other: McMaster-Carr

    The coolant outlet on the top is only 1/8" NPT but I want to get back up to 1/2" pipe as quickly as possible to reduce flow constriction. To do that and to fit into the available space I'm using:
    1x 90º 1/4" to 1/8" reducer: McMaster-Carr
    1x 1/4" NPT to 1/2" push to connect: https://www.mcmaster.com/51495K195

    The fittings seem to be really high quality, nicest looking PTC fittings I've seen yet! I bought 25' of 1/2" polyethylene tube for the plumbing but I think it might be a tad on the stiff side to run through the cable chain, I will try it and report back.

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  12. #29
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    That poly tubing might kink inside the cable chain, the rubber hose has a rather thick wall and doesn't kink. That's the main problem I've had with plastic tubing, except for air-brake tubing (unless you bend it too far and kink it).

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  14. #30
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    Quote Originally Posted by aarongough View Post
    For future reference for myself, and for anyone else thinking about retrofitting a spindle cooler onto a Fadal, here are some useful part numbers:
    Ok.. So now what is the rest of the plan??

    I'm voting for an Oompa Loompa sitting on top of the spindle pouring velocite down a
    funnel out of a powder horn.. That would make a great video.

    I'm joking of course, though that would make a good video..

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    Quote Originally Posted by Bobw View Post
    Ok.. So now what is the rest of the plan??

    I'm voting for an Oompa Loompa sitting on top of the spindle pouring velocite down a
    funnel out of a powder horn.. That would make a great video.

    I'm joking of course, though that would make a good video..
    I'm 5'3... I'd volunteer to do that for a video.

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    I just had this vision of someone riding a Fadal spindle head like one of those mechanical bulls in a bar.

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    Quote Originally Posted by Perry Harrington View Post
    I just had this vision of someone riding a Fadal spindle head like one of those mechanical bulls in a bar.

    I'm trying really hard to find the picture from the Machinist facebook group of a guy riding the head of a BIG mill turn like a bronco. It's hilarious.

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    Quote Originally Posted by TeachMePlease View Post
    I'm trying really hard to find the picture from the Machinist facebook group of a guy riding the head of a BIG mill turn like a bronco. It's hilarious.
    Was he a Darwin award winner?

  22. #35
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    Quote Originally Posted by Perry Harrington View Post
    Was he a Darwin award winner?
    Nah, it was stationary, just a photo op, not an award ceremony

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    SO what stops someone from changing the pump's soft parts to another material and then putting in some spindle oil as the coolant?

  24. #37
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    Quote Originally Posted by Cole2534 View Post
    SO what stops someone from changing the pump's soft parts to another material and then putting in some spindle oil as the coolant?
    I used a coolant pump, so nothing stops me


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