Lightly dress the other end of the pushrod with a Dremel so that you can thread the
clevis onto it. It is not necessary to use a die as once the pushrod is slightly roughed
up and thinned at the end, the clevis will form its own threads when you screw it on.
Set the length as shown, to 49mm from clevis pin to the threaded L bend. If you are
using clevis – clevis, then the dimension is the same – 49mm from clevis pin to clevis
pin.
Set this position by soldering the clevis to the pushrod. Ensure that the clevis
pin and the threaded L bend are perfectly in line.
To thread it into the servo arm, drill a 1.6mm hole 6mm from the centre of the hub.
Then using an M2 pushrod, make a tap by bending it as shown, and putting a slot
into the end using a thin Dremel cut-off wheel. Use this tap to put the M2 threads into
the 1.6mm hole in the servo arm.
Here’s an example of a threaded L bend linkage installed to a servo arm. This one
has not yet been soldered. The bearing in the servo arm for the linkage are the
threads themselves.
