The Scorpion HK-4020 motors are built with 8mm hardened steel shafts that
will last through countless hours of flying fun, but occasionally, on a "Less
than Perfect" landing, you may bend or break one. For these occasions, we offer
factory repalcement shafts for all the HK-4020 series Scorpion Helicopter
Motors. Our Motor Shaft Kits include an original equipment factory shaft with
the setscrew keyways already cut, a new spacer washer, and a set of 2 retaining
clips. This way, when one goes flying and bounces off the wall while you are
trying to install it, never to be found again, you still have another one to
use!
The shaft for the HK-4020 series motors measures 8mm in diameter,
and is 71mm in long. The Stock HK-4020 motors have a 5mm output shaft end on
them to allow the user to install 5mm pinion gears. The shaft kit will also fit
other brushless motors that require an 8mm shaft of this length with a 5mm end.
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.
