6mm QR "twist-lock" couplings various

thingiverse

Update: working "V2" files are now being uploaded as they come off the printer and have proven to be fully functional. Everything should be working properly from this point forward. If you encounter any issues, please let me know. I discovered that the 6mm hose locking nut wasn't tight enough to grip the hose, so I reduced it by 1mm. A set of twist-lock couplings for 6mm i/d hose is now available. These were inspired by some connectors from a DIY portable hose kit I purchased. Since I couldn't find spare parts anywhere, I decided to design my own. The male portion features an 18mm thread with a 1.5mm pitch. To complete these parts, you'll need o-ring seals - specifically an 8mmI/D x2mm section for the male component. Some light adjustments of the o-ring seat using a file or abrasive paper may be necessary to achieve the optimal fit. If your printed parts are leaky, I've found that a quick acetone smoothing treatment can seal them up effectively. I encountered significant difficulties getting the internal threads to print. Below is a list of settings used to print each component successfully: Male 18mm thread: All axis increased by 3% Material: ABS Infill: 100% Layer height: 0.1mm Speed: 30mm/s (slowed manually to 20mm/s for printing threads) Ext temp: 140C Cooling: 30% (temp controlled enclosure held at 45c) Supports: yes Locknut: All axis increased by 6% Material: ABS Infill: 100% Layer height: 0.1mm Speed: 20mm/s Ext temp: 140C Cooling: 30% (temp controlled enclosure held at 45C) Support: no Male to 6mm hose - 20mm bulkhead: All axis increased by 2% Material: ABS Infill: 100% Layer height: 0.2mm Speed: 30mm/s Ext temp: 240C Cooling: 30% (temp controlled enclosure held at 45C) Support: yes 20mm Bulkhead nut: All axis increased by 2% Material: ABS Infill: 100% Layer height: 0.1mm Speed: 30mm/s Ext temp: 240C Cooling: 30% (temp controlled enclosure held at 45C) Support: no Female to 6mm hose: All axis increased by 2% Material: ABS Infill: 100% Layer height: 0.2mm (0.1mm may work better to prevent it from wearing the O-ring down) Speed: 30mm/s Ext temp: 240C Cooling: 30% (temp controlled enclosure held at 45C) Support: yes