Summary

A functional pitch controlled mount for the Logitech C920 camera (autofocus, HD) to go in the head of my Droidbot 07 project (https://droidbot07.blogspot.com/2019/01/logitech-c920-camera-pitch-mount.html)

Actuated by a 9g servo allowing ±45° vertical swing.
It utilises a remix of: Logitech C920 Adapter for RaffoSan's Camera Arm by Felwat
that can be found here: https://www.thingiverse.com/thing:3343134

Small bearing used:
Inner diameter: 6 mm
Outer diameter: 19 mm
Width: 5 mm

I thought they where these: https://www.amazon.co.uk/gp/product/B00YIKFK26
but the listed dimensions are wrong. I bought them some time ago.

I used a 35mm cap-head M6 hex bolt and nut for the horizontal platform.

I also used a 30mm M3 screw to lock the bearing retainer in place, but you could shove pretty much anything in there.

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21 Jan 2019 - added shorter V2 with different mounting arrangement. M3x30mm now not needed; use 1.75mm filament to lock the bearing retainer.