| 摘要 |
<p>The guide consists of a bearing (5) with two rows of balls (51, 52) between a steel inner ring (53) supporting the load and a steel outer ring (54) fixed directly to an aluminium supporting structure (1). The forward section (541) of the outer ring is conical in shape to compensate, during variations in temperature, for the pressure applied by the supporting structure against the outer ring. The outer ring is fixed to the supporting structure by a collar (542) and centred by a short centering ring (543), and its conical surface lies at an angle of 20 - 30 degrees to the horizontal. The contact surfaces of the rows of balls are at equal angles between 40 and 60 degrees.</p> |
