3mm Bowden -- What size tube?

Hey all,

Working on switching over to a bowden setup in anticipation of my Rostock. Since I already have a 3mm hotend and a big pile of 3mm filament, I'd like to stick with it. I've found some good adapters on Thingiverse, but the one thing that has been unclear is what diameter PTFE tube to get. Some places recommend 3mm ID/5mm OD, and some say 4mm ID/6mm OD. Does anyone have suggestions one way or the other? My gut tells me that 3mm would have less hysteresis on retracts, but might be liable to sticking.

Thanks,
Chris

If your filament diameter never exceeds 2.9mm or so, then 3mm tube would probably work. For my next printer which will be bowden, I got 1/8in (3.175mm) tube. 4mm would probably introduce a lot more hysteresis than you would otherwise have.

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Oooh, good thinking. Slight incompatibilities between metric and imperial is helping instead of hurting for once!

Folks,

Has anyone a recommendation for suppliers of 2 mm ID PTFE tube in Europe? I can find 25 Metre lengths but all I want is a single metre!

Best regards,

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Philip Mac Cabe
Irish, Retired and loving it.

metric ptfe from ebay-china.

i had a hard time to get 3.2 ID tube.

where did you manage to get your 1/8" tube? i'm assuming its a 1/4" OD 1/8" ID, like the PTFE Liner in the PEEK of a J-Head. I'm in canada and i've only found one supplier in the UK on ebay and its NOT cheap.

Hmm, here in the states McMaster is my choice. I don't know what their Canadian shipping cost is, or if there's a Canadian counterpart.

I got it free from croatian fablab guy. Thanks!