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At present, the domestic wind power equipment manufacturing industry has formed a production system covering blades, gear boxes, generators, towers and other main parts. Among which the blade and the turbine are experiencing over-capacity, while there is still a short in production for the bearer.
Considering the supply and demand of wind power equipments, the amount of blades and turbine currently under construction exceeds the estimated market demand of the next 2 years, which leads to overcapacity.
According to the wind power development plan of Chinese government, an additional 10 million and 12 million kW capacity will be introduced in 2009 and 2010. However, the major domestic turbine producers plan to expand their effective capacity to around 11 million and 19 million kW in 2009 and 2010 respectively. Sinovel, Goldwind Tech and Dongfang Elec, the top 3 enterprises in wind power, are estimated to own a combined capacity of 7.6, 11 and 15 million kW in 2009, 2010 and 2011 accordingly. Besides the 3 giants, there are about 60 to 70 medium-sized wind power turbine manufacturers which started their R&D around 2006 and 2007 and will proceed to the stage of small-batch production in 2009 and 2010. These manufacturers will have to face the fierce competition of market share in the next few years when the overcapacity brings down the price and profit margin. However, the current gross profit margin is barely satisfactory. Goldwind Tech possesses a gross margin of 18% to 28% in 2008, while the number for Dongfang Elec is just around 11%.
The number of blade manufacturers increases rapidly in recent years. At the meantime, the wind turbine producers tend to produce their own blades because it accounts for a large portion of the whole value of a machine. These lead to a fast growth in capacity, which exceeds the future market demand.
However, there are investment opportunities lying in the manufacturing of bearings, where the gap between supply and demand still exists. There are limited companies that are capable of producing yaw bearings and pitch system bearings, while the main bearing of wind power generators almost rely entirely on imports. Judging from the present situation, the market of bearings will not reach balance in a short time. As a result, the high profit margin of bearings is estimated to maintain for a relatively long time.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 234413M.SP bearing | 65 | 100 | 44 |
| 234712M.SP bearing | 62 | 95 | 44 |