How do you use a Radial Drilling Machine?

There are two common methods of driving the spindle. A constant speed motor is mounted at the extreme end of the radial drilling arm which balances partially the weight of the overhanging arm. The motor drives a horizontal spindle which runs along the length of the arm and the motion is transmitted to the drill head through bevel gears. By train of gearing within the drill head, the speed of the spindle may be varied. Through another train of gearing within the drill head. different feeds of the spindle are obtained. In some machines, a vertical motor is fitted directly on the drill head and through gear box multiple speed and the feed of the spindle can be obtained.
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