The Cobra 4120 Series motors are built with 6mm 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 replacement shafts for all the Cobra Motors.
The shaft kit for the Cobra 4120 series airplane motors includes a new shaft, which measures 5.98mm in diameter and is 74.5mm long, along with a new C-Clip to hold the motor together. The ring groove for the C-Clip is cut 18mm from the back end of the shaft. The shaft kit will also fit other brushless motors that require a 6mm 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.