in the photo to the left, a ring is cut from 1/4" (6mm) steel
and welded to the yaw shaft. Another ring is cut and welded to the
bottom of the yaw tube. The ring on the yaw tube should be slightly
larger OD than the ring on the shaft, since this helps prevent rain
water from getting into your thrust flange assembly.
is a grease fitting (not shown) that is screwed into the yaw tube
to lubricate the yaw assembly.
yaw assembly provides a very robust system that will support a heavy
turbine with ease, and it yaws and faces the wind with the slightest
breeze. It also does not stick or seize, or prevent proper furling
action of your turbine.