| 摘要 |
The bearing comprises a double rolling bearing 3, and a single rolling bearing 4, each of low conicity and equipped with rollers, such as 7a, having axial perforations 17a coinciding with perforations in the cage; the external ring 8c2 of the rolling bearing 4 receives, from springs 14, an axial thrust transmitted by the spindle 2 to the rolling bearing 3, which eliminates all play in the bearing. According to the invention, a single mass of lubricant passes through a cooler and then through the axial perforations of the rollers, in a manner such as to fill completely the annular chambers 18b and 19b between the two rolling bearings and balance them thermally. The invention is applicable, in particular, to high-precision machine tools. <IMAGE> |
