Oiless air compressor for milling machine

Discussion in 'Other Equipment' started by denticious, Mar 19, 2016.

  1. denticious

    denticious Administrator Staff Member

    Hello people

    Im looking for an oiless air compressor in order to provide air to milling machine

    The compressor should cover approximately 120 litres per minute at a pressure of 6-8 bars.

    As you understand the air should be clean and dry. A sufficient tank of 300-1000 litres .

    The problem is that after a big research I've done I have realized that the compressors covering these needs are really expensive. So do you have any suggestions or solutions in order to make this more affordable or at least in a reasonable cost range.

    Let me know your ideas about it
     
  2. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    What is a reasonable cost range?

    We have been using Air Techniques compressors. Clean and dry air is not a problem, but the compressor heads can't be rebuilt. When they crap out you have to replace the whole head.:( The price for a non repairable head is ridiculous. We had a head go out and started looking for heads that we could replace bearings on and tried Shulz heads. They work fine, but the design is flawed as we found out when one of the main bearings started to go. We ordered parts and opened the casing. The crank has a free end not supported at all. I'll try to find an exploded view of the motor. The whole motor is cheap enough to have an extra one around to swap out if the bearing goes and take the bad motor apart and replace the bearings so you have no real down time.

    I think the next compressor I get will be some cheap rebuildable and add a few inline oil filters and a refrigerated dryer.
    Interested to hear what others are using.
     
    texocad and denticious like this.
  3. denticious

    denticious Administrator Staff Member


    I think a reasonable cost range would be 2000-3000 euros and not 4000-6000 euros that I have seen for dental oil free air compressors.

    But as you said I want to hear also opinions from many people here about this ............Im really curious.

    I had also the idea to buy a oil compressors and put the best filters on it and hydrator in order to keep the overall cost low and of course to be able to have cheap parts for future for repairs........ but I dont know the exact quality of the output air
     
  4. 2thm8kr

    2thm8kr ɹotɐɹʇsıuıɯqA Staff Member

    The Air Techniques compressor we are using for the mill is about $4500. That's a lot for something that can't be rebuilt. I haven't had to replace a head on this compressor yet. It is about 6 years old. The other Air Techniques compressor is about 8 years old and runs an entire dental office with 6 operatories and 3 hygiene rooms. We have swapped out the heads three times. Twice on one side and once on the other. This is the one we experimented with the Shulz heads on.
     
    denticious likes this.
  5. denticious

    denticious Administrator Staff Member

    I have realised that most dental air compressors brands dont go more than 100 litres.............and even for these compressors they charge 4000-5000 euros. They have filters and air dryer though but I believe must a middle way to compensate between performance and price.
     
  6. cadfan

    cadfan Moderator Staff Member

    i would buy a 210 only 60 db maybe add additional tank and for 600-700 dollar a cool dryer and here in Europe tanks over 1oo liter volume must be inspected i think every 2 years thats why i have only 90 liters only once in a lifetime inspected.
    Dont use these dry patron's they are crap had one compressor with it dry medicine quality air with special piston had to change every 1000 hours the piston seals and after 3 years he was dead.
    http://www.smtmax.com/category.php?id=52
     
    Last edited: Mar 19, 2016
  7. We don't have any partners on the compressors but we usually advise our customers to buy from Cattani, an italian company. Maybe take a look there if they can match your needs
     
  8. Igor-gs

    Igor-gs New Member

    I've got today brand new Cattani AC 200 oil free with air dry sistem for a less the 2000 euros. I've got already same compresor with out air dryer from 2004 and I haven't any problem so far. I think it is about 160l/min of pure and dry air... I think it is realy good choise for that money
     
  9. cadfan

    cadfan Moderator Staff Member

    with cold dryer or dry cartrige ?
     
  10. Igor-gs

    Igor-gs New Member

    I have no idea ... I'll check tomorow and let you know...
     
  11. cadfan

    cadfan Moderator Staff Member

    forget dry cartriges for a mill it works 3 month maybe than they are saturated , dry cooler or max a cartrige after a second tank that the water could condense in the second tank and the cartrige is not saturated so fast.
     
  12. Igor-gs

    Igor-gs New Member

    I
    I'm not sure...but I don't know any dentist or tehnician who complained on this Cattani commpresor... I cannot upload pics but If you have free time you can take a look on Cattani.it for AC200 model with air drayer.
    There are one black box that looks like some kind of radiator and one vertical cilinder aditional beetwin compersion heads and tank. There are no any cartriges...I think... They told me that air will be dry 100%
     
  13. cadfan

    cadfan Moderator Staff Member

    Hi Igor i dont know i took a look looks like a salt or other cartridge but i am not sure see link these are cool dryer they refrigirate the water and seperate. Ask them if theirs a material inside the cartridge that must be changed from time to time . On a mill it runs nearly all day long thats different from a surgery praxis . The pic below is my cartridge theres a salt inside the biggest shit i ever bought

    http://silair.de/kaeltetrockner-dryer.html

    P1010005.JPG
     
    Last edited: Apr 19, 2016
  14. Igor-gs

    Igor-gs New Member

    I will sent e mail to Cattani...and let you know... Thank you anyway... Keep in touch..
     
  15. As Igor said, we haven't heard anyone complain about Cattani compressors. All our customers that chose it are really really happy.
     
  16. Igor-gs

    Igor-gs New Member

    My servicer said :"Theere is no need for any kind of maintance...just replace" intake "air filter once at year.... There is air cooler with ventilator and silicate balls and all excesive moisture(wet)goes into plastic canister. It is necessery to empty canister when it is full."
    Cattani did not replay to my mail...yet...
     
    cadfan likes this.
  17. Igor-gs

    Igor-gs New Member

    I have recived answer from Cattani...

    "...Actually the only maintenance required by our oil-less compressors it's to replace the air inlet filters every 12 months and to check every 3 months the functioning of the dryer electrovalve and clean it carefully..."
     
  18. Robert Squire

    Robert Squire Active Member

  19. cadfan

    cadfan Moderator Staff Member

    oil free silent or the bigger one ( see link) but the bigger is 65 db thats 50 % louder add a second 50 lieter tank so it runs not so often and less moister 200 lieter should be enough for mill only. Kompressor is a electricity sucction so at less it runs as cheaper therefore 2 tanks so it runs 30 percent or so less so the bill is ....


    https://www.implotex.de/silent-air-...ompressor-druckluftkompressor-implotex/a-666/
     
    Robert Squire likes this.
  20. Robert Squire

    Robert Squire Active Member

    Auto drain, or no auto drain??? Should we install an auto drain on our mill's compressor, or does it have the chance to drain too much air during the mill cycle? Recommendations, please?
     

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