通过对轴承钻油孔夹具结构的改进，使钻油孔夹具内径与外径定位兼备，扩大使用范围，降低制造成本。

The fixture used for oil hole drilling has both ID and od location by improving the structure of the fixture, so as to expand application scope and reduce production cost.

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对转台中环主轴施加轴向定位预紧力，通过脉冲激励法试验得到角接触球轴承的轴向刚度，试验结果与理论结果吻合较好，为转台研制中各轴系预紧量的控制提供了理论和实验依据。

The axial fixed position preload is applied to middle ring of the shaft, the axial rigidity of the angular contact ball bearing is obtained by the impulse excitation tests.

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在内圈的一端，轴承通过偏心锁定环(图1.7)或者两个定位螺钉(图1.8)被固定在轴上。

At one end of the inner ring, the bearing is clamped to the shaft with an eccentric locking ring (Figure 1.7) or with two setscrews (Figure 1.8).

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