E3D Embedded Bowden Couplings Need to embed a Bowden/PTFE tube into a metal or plastic part? Here's the answer! Embedded Bowden Coupling for Metal The metal couplings are designed to take PTFE tubing with an outer diameter of 3.18mm for 1.75mm filament, and 6.35mm for 2.85 mm filament. These fittings are used in both types of the 1.75mm V6 hotends, the 3.0mm Bowden V6 hotend, and the Cyclops/Chimera/Kraken/ Hemera HotEnds. Embedded Bowden Coupling for Plastic The plastic couplings are designed to take 4mm OD tubing and the plastic ring is designed to be inserted into a 12mm hole at least 7mm deep. Dimensions for the plastic outer ring: Outer diameter: 11.8mm Overall diameter: 12.8mm Inner diameter: 6.3mm Thickness: 5mm Dimensions for the plastic insert: Outer diameter: 10mm Inner diameter: 4mm Thickness of top lip: 1.5mm Diameter of legs: 6mm
