Flexible Coolant Pipe - 1ft (1/2")

These plastic Flexible Coolant Pipes have been primarily used to spray refrigeration or washing fluid for machine tools but, thanks to their articulation, they can be used in a multitude of different ways as well. We use them as extra arms for our third hand.

The coolant pipes are 1ft long with a nozzle diameter of 3.5mm and 1/2"-20 pipe thread. Check the drawing below.


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  • Can range between $8.99 for 6, to $16 for 12 with shipping if you search for "flexible coolant pipe".

  • I have a clarification question. Thee description says 1/2-20 pipe thread. Is that NPT? The drawing for the full kit, indicate that the aluminum base plate has M14x1.25 holes to mount these tubes. http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Tools/TOL-11784a.pdf

    If I am making a base plate myself, what tap should I use?

    • NPT is a pipe thread. It's essentially tapered. If you just use a standard 1/2-20 tap, you should be fine. it will just thread in tight the more you thread it (since it's tapered). This is to seal the connection. M14 is VERY close to 1/2-20.

  • Does anyone have a 3D model (preferably in a format that could be imported into Sketchup) for one of the segments? I would love 3D print some custom bits to put on the ends, but want to use the pipe as a conduit (so the "default" plan of putting a screw in the nozzle end and attaching that way won't work).

    Modifying a 3D model of a snap-on segment to open up into whatever end I desire would be pretty sweet :)

  • http://www.loc-line.com/index.html: There so many useful applications for this it's crazy. "Where have you been all my life", that's all I thought when I discovered this product line. I built a fume extractor out of their anti-static 2.5" vacuum hose, anti-static 4.5" round nozzle, 120 mm case fan, and 12v power supply. In addition, you can add an optional speed control if you want (e.g. PWM). Then I just made a mount for one end of the hose to fit in a partially open window pane ( basically a tall rectangle, at least for my window, that seals the opening). Since it's flexible you can position to your working area! Thank you spark fun. It's only because of this site I discovered this product :) .

  • I'm sorry, but that price is way over the top. This isn't even brand-name stuff. Start selling the plates alone so we can just buy the hoses elsewhere.

    • out of curiosity, what prices are you seeing for the hoses?

      • For myself, on Amazon I've purchased 6x for $13 shipped. Arrived in a week. No defects, looks and operates to the same spec as those sold here, etc. Even the single-unit, Prime-shipped coolant hoses run less than $6 each. The SF prices above are on par with the brand-name Snap Flow kits that Enco sells -- the site the original Instructables guide links to (http://www.use-enco.com/CGI/INPDFF?PMPAGE=935&PMITEM=240-7509).

        The hoses are a commodity item, and on SF they're simply not priced competitively, especially for no-name parts that probably come from the same Chinese warehouses. The plates, however, are the hard part of the project to find or build. The threads on the base are slightly tapered with a somewhat oddball 1/2"-20 threading. People don't want to buy special tap kits or bits for that, only to have the tubes still not fit. I'm lucky enough to have a friend who has the facilities to do it right and he's making me one with some scrap.

        I don't know where you got the first stock of plates, but if you guys start shipping branded plates with part holder compartments, etc. you'll corner the market on high-end third-hands. You could even anodize them with a sharp colored logo, or even just solid black for something really fancy.

      • about $10 for 6 if you're willing to wait (it took about a month for these to show up in Vancouver, Canada) http://www.ebay.ca/itm/6-x-Flexible-Water-Oil-Coolant-Pipe-Hose-for-Lathe-CNC-/130537853619?pt=LH_DefaultDomain_0&hash=item1e64a992b3&_uhb=1

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