El Beast - Initial design phase, comments and critique welcomed!

**Zeeflyboy** · 25-05-2018

Originally Posted by Snapper

Its a very nice knurl you pulled off on the last one, how many goes did that take to get right?

Just the one attempt actually! I did use a knurl calculator to arrive at a suitable diameter for the knob, so that probably helped a little. I'd actually like a coarser Knurl, need to buy some 1mm wheels for my knurling device.

**Zeeflyboy** · 29-05-2018

Sorted out the ball nut greasing arrangement... So obviously I didn't fancy stripping down the whole thing every time the ball screw needed a bit of grease. I came up with this solution:

Made a small hex piece with an M6 thread on the lathe

3D printed a plug with m20x1 thread (to match the hole in the face plate) in my new PA-CF nylon/carbon fibre material and added a 4mm hose barb.

Added a hose barb and 90 degree connector to the ball nut (locked in with hydraulic sealant to the position required) and a silicone hose to connect the two pieces. This picture gives an idea of how the arrangement works:

And done: