Hobb-Goblin direct drive Bowden extruder
thingiverse
This extruder is specifically designed for an E3D Hobb-Goblin drive gear, drawing inspiration from the D-bot extruder but optimized to allow filament movement without idler tensioning. It attaches via an M4 bolt on the side, much like my previous extruder design. A 4mm passage enables a PTFE tube to reach all the way to the drive gear. The extruder mounts securely using an M4 screw to the support on the bracing M10 rod. Required hardware includes: 3X M3x8mm 1X 625ZZ Bearing 1X M5 12mm Bolt 1X M5 Nylock Nut 1X M3x10mm 1X M5x40mm 1X M5 nut spring and washers You can find the PC4-01 fitting here: http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.A0.H0.XPC4-01.TRS5&_nkw=PC4-01&_sacat=0 About $5 shipped from the US, or you can find a similar product on https://www.aliexpress.com/item/3D-Printer-Pneumatic-Connectors-PC4-01-1-75mm-PTFE-Tube-quick-coupler-j-head-Fittings-Reprap/32361630920.html for $0.50 from China. I received the PC4-01 fitting in about two weeks from AliExpress to Los Angeles, which was not bad considering shipping time.
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