10T 2mm M0.4 pinion gear for 180 CFX helicopter

This is a 10T pinion gear for working with HP20S upgrading motor on 180 CFX, its hole size is 2mm in diameter, length is 5mm, outsider diameter is 4.57mm, high quality and of high precision! its modular is M0.4

Please clean the motor shaft and the inner hole of the pinion by ethyl alcohol firstly, then daub a bit of the Anaerobic adhesive on the shaft where the pinion gear will be installed. Wait for 1 minute or so, be sure the Anaerobic adhesive be dried and then you can put it into use.
If the hole of the pinion gear is tight and not easy to push it onto the shaft, you can grind the shaft by fine emery paper and try again.