The shaft for the 3020 series motors measures 5mm in diameter, and is
76.5mm in long. The shaft kit will also fit other brushless motors that
require a 5mm shaft of this length. The shafts can be cut shorter with
a Dremel tool and a cut-off wheel if necessary to fit other motors.
Note: The shafts in the Scorpion motors are a slight press fit
into the aluminum front housing. The shafts will not just slide out
when the setscrews are removed. They need to be pressed out in a
bearing press, or in a drill press, with the front houshing of the
motor supported in a block of wood to prevent warping the front housing.