2013年8月20日星期二

Screw with thrust angular contact ball bearings


Ball thrust angular contact ball bearings with a contact angle of 60o, with a high axial stiffness, mainly withstand axial load, but also bear certain radial load.
In withstand axial load, the load should be based on the size and characteristics of paired configuration, the configuration to be applied to a certain load. Machine screw angular contact thrust ball bearings for precision spindle bearings basically the same requirements and the general use of 2,4-tolerance level. Because the system requires a flexible and precise movement of the axial displacement, thus requiring the bearing should have a low and uniform friction torque, in particular that has a low starting frictional torque,Tapered roller Tapered roller bearings inner ring and the outer ring raceway is conical roller, it is also rolling cone, the apex of the conical surface are three polylactide point on the bearing axis. This design makes tapered roller bearings particularly suitable for both radial and axial directions of combined loads. Bearing axial load size, depending on the size of the contact angle α. Commonly used in the bearing dimensions table angular size of the calculation of the coefficient A represents a, a larger value withstand greater axial load. Tapered roller bearing load carrying capacity of the same size is much larger than the angular contact ball bearings, but it's far below the speed limit angular contact ball bearings, so it is commonly used in low speed, heavy load bearing lathes, boring and milling machine and jig boring on the spindle.
Tapered roller bearings series consists of a separable outer ring and the inner ring, cage, roller assembly combination. For precision tapered roller bearings, the outer ring are not interchangeable.

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