For matched bearings mounted immediately adjacent to each other, the reference speed for the bearing pair is some 20 % lower than for a single bearing.
对于紧靠在一起安装的配对轴承，配对轴承的额定速度比单个轴承低20%左右。
2
It has basically matched with low speed sealing bearing bit, but it cannot avoid its fault.
它与低速密封轴承钻头已基本匹配，但其失效不可避免。
3
If matched pairs of tapered roller bearings arranged face-to-face or back-to-back are mounted together with a third bearing, the bearing arrangement is statically indeterminate.