How to use a radial drill press for tapping?
1.Special attention should be paid when tapping with a radial drilling machine: because the material of the workpiece for tapping is different, the selected speed is also different, and different drilling speeds should be selected according to different tapping materials.
2. When tapping the radial drilling machine, first turn the drilling machine in reverse, insert the tap into the bottom hole of the thread, apply some vegetable oil or special oil for tapping to the tap with a brush, and then turn the spindle of the radial drilling machine forward. During the tapping process, it is necessary to reverse several times to break the chips and prevent the tap from being cut and broken.
3. The depth of the processing hole, the tap should be replaced in time when it is worn out, and the rotational speed of the radial drilling machine should not be too fast.
When the radial drilling machine is tapping the parts, the active feed of the radial drilling machine should be adjusted to neutral, and then the speed should be adjusted slower. For example, when the M20 screw hole is used, the drilling speed should be adjusted to the lowest level. During the tapping process, first rotate the radial drilling machine, insert the tap into the bottom hole of the thread, apply some vegetable oil or special oil for tapping on the tap with a brush, and then turn the spindle to the positive rotation, and then tap the tap. During the process, remember to make several rotations to break the chips and prevent the tap from being cut and broken. In the process of tapping, the left hand should be placed on the handle of the spindle, and the right hand should hold the positive rotation handle of the radial drilling machine.
When the radial drilling machine is rotating forward, the left hand should give some force to enable the tap to tap in smoothly. After tapping in a few buttons, the left hand only needs to follow the handle movement. When the tapping depth is reached, it must start to rotate, and the tap will retreat upward. During the process, the left hand should gently lift the tap up, do not use too much force. until the tap exits the hole. If the tapping is a blind hole, before tapping, the tap should be attached to the surface of the workpiece to be tapped, and the depth to be tapped should be determined, and then tapped. After reaching the set depth, quickly tap The drill press is turned to the rotary gear, so that the tap is withdrawn. When setting the depth, a few millimeters of reserve should be reserved to avoid the tap from hitting the bottom and breaking the tap. It is worth noting that when tapping, you must not take the initiative! The drilling speed of tapping should be determined according to the material of the workpiece to be tapped and the hardness of the material. If it is low carbon steel, copper, aluminum and other materials, the speed of tapping can be faster.
At the beginning, the speed can be adjusted to dozens of revolutions first. After you are proficient, you can gradually increase the speed. If you have been working for a long time, you are now very skilled, and the speed can reach one or two hundred revolutions. However, when tapping high-carbon steel, the speed cannot be too high, and the tapping can only be carried out gradually at a low speed, and more chips should be withdrawn and rotated to prevent the tap from breaking.
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