DAC series wheel bearing is a double row angular contact ball bearing incorporating an integral outer ring and two separable inner rings which is available with seals or without seals.
Four pionts Angle contact ball bearing is separable bearing, it can be subject to bi-directional load and have the function of both single row and double rows bearings.
四点接触球轴承为可分离型轴承，可承受双向轴向载荷，并有单列和双列角接触球轴承的功能。
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Angular contact ball bearings are non-separable. They are suitable for high speeds. Their self-aligning capability is very limited.