Hobbed Bolt Bowden Drive

This a RepRap extruder driver:

- For Bowden extruder
- Uses an M8 hobbed bolt
- Frame mounted: Mendel and Huxley* frames

Print:

- Hobbed Bolt Bowden Drive
- Idler (Jonaskuehling)
- Big and small gears (Jonaskuehling).
I used the 'fixed gears'; both sets are included.
- Frame mount (RepRapPro)
- Coupling tongue: (RepRapPro)

Hardware:

- M8 hobbed bolt (ebay)
- 2 x 608 bearings (ebay)
- M8 washers (3-4) and nuts (1-2)
- Idler: J-kuehling suggests M4 x 60 (2) + n