Established in 1998, China Xiaowei Bearing Co., Ltd. is a high-tech enterprise specializing in main bearing manufacturer and main bearings supplier many kinds of bearings. We have a modernized staffs of tech research and fog machine development, ISO9001 certificated, and manufacturing adopts advanced domestic and foreign standards such as GB, API, JIS, DIN, BS, NF and ANSI. Our main bearing are exported to countries and regions in Europe(UK, France, Italy, Germany), North America(USA, Canda), the Middle East and Southeast Asia.

Contains 2 bearings.
Each main gear requires 2 bearings.
A complete Draganflyer helicopter requires 8 bearings
Every Draganflyer model uses ball bearings in the main gear of it's drive system to increase efficiency and provide smoother operation. Occassionally you may need to replace these bearings as they can get worn out or damaged in a crash. Each of the main gears on the helicopter uses two of these bearings making a total of eight on the complete helicopter. This includes two main gear bearings, each gear requires two bearings for optimal efficiency and life expectancy. Compatible with all versions of the Draganflyer helicopter. We export our engine bearings and bushings to many countries, and we can develop new products by samples, drawings according to your special requirements.

These materials were developed as an improvement on the white metal and copper based alloys and to provide bearings that carry high loads. The disadvantages are only
moderate embedding properties, poor compatibility , and high coefficients of thermal expansion.
Special features include good resistance to corrosion, high thermal conductivity, and high fatigue strength. If used as solid unbacked bearings this type of alloy is usually too weak to maintain an interference fit and too hard to run satisfactorily against an unhardened shaft. It was found that 20% of tin added to the aluminum improved seizure resistance and that cold working and annealing helped to prevent brittleness.
As a bearing material unalloyed aluminum has a tendency to seize to a steel mating surface. The difference in coefficients between aluminum and steel necessitates work hardening the bearing before use to prevent loosening in service.