The main spindle is driven by a variable frequency controlled AC motor.

主轴是由变频控制交流电机驱动。

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Average type beam drill is composed of base, inside and outside column, rocker arm, main spindle box and job.

普通型摇臂钻床由底座、内外立柱、摇臂、主轴箱及工作组成。

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Main spindle device, composite processing machine with the main spindle device, and method of assembling main spindle device.

主轴装置，包括该主轴装置的加工中心，以及装配该主轴装置的方法。

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