PTFE Capricorn Tubing – XS Series 1.75mm (1 meter)

$11.99$15.99

This is, hands down, the single best PTFE Bowden tubing you can buy for your home 3D printer.

Guaranteed to always be the right diameter, and perfectly round. Print flexible filaments without the binding up that happens with over-diameter tubes.

Sold by the Meter. (100 cm or 3.28 ft)

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Warranty: 30 Days

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SKU: captube-1m Category:

Description

PTFE, or Polytetrafluoroethylene, is a synthetic polymer commonly used as a coating for non-stick pots and pans. It is the slipperiest substance known to man, and is said to be the only surface to which a gecko cannot stick. Although Bowden tubes can be made from several different polymers, PTFE is generally considered the best because of its high melting point and low coefficient of friction.

1.75mm Bowden tubing, because of its small diameter, is made with an expensive paste extrusion process. Very precise equipment is needed to obtain a consistent shape and internal diameter. Additives such as colorant are difficult, because the PTFE doesn’t readily want to mix with anything. Plain white PTFE is the cheapest and most common.

Capricorn tubing is manufactured using the most sophisticated equipment currently available. It always comes out perfectly round, and the diameter stays as consistent as possible.

Data Sheet

Our Premium XS Series Dark Blue Tubing
Additives Blue Color and Secret High Lubricity Additive Mixture
Best For Chunky Filaments YES
Best For Flexible Filaments YES
Can See Through NO
Pulling Friction 0.8
Color Dark Blue
Density (kg/m3) 2300 +/-100
Hardness 60-65
Inner Diameter (mm) 1.90 +/- 0.05
Linear Thermal Expansion at 250 °C 2.2-3.3%
Material Highest Quality Pure Virgin PTFE
Melting Point (°C) up to 340
Outer Diameter 3.95 +/- 0.05
Roundness (ϵ) < 0.1
Stiffness Medium High
Thermal Conductivity (W/m-k) 0.25
Wear Rate (gm/s) 0.01
Young’s Modulus (GPa) 0.53
Pulling Friction is calculated as the average force required to pull 1.2 meters of 1.75mm PLA filament through 1 meter of tubing at a constant speed, relative to 1 meter of cheap white reference tubing. Note that although we observed the friction of the TL series to be about the same or even slightly lower than our XS series, it also has a larger internal diameter.
Other Bowden tubes may vary significantly in stiffness, depending on the material from which they’re made. Our tubing generally tends to be more flexible than most, with the TL being more flexible than XS.
Young’s Modulus (YM) is the measure of elasticity of the material. Our XS Series additives give the PTFE a slightly greater YM than the TL Series.
Temperatures were approximated by heating samples of all tubing simultaneously, observing how quickly each one began to deform. Printer failures may happen at significantly lower temperatures.

Details specs available at https://www.captubes.com/specs.html