How to change the drill bit of the hand electric drill? Safety operation rules of hand electric drill and maintenance of drill bit

A hand drill is a small drilling tool that is easy to carry. It consists of a motor, a control switch, a drill chuck and a drill bit. A hand drill is also an item often used in daily life. A hand drill is a tool that drives the drill bit to quickly rotate through a mechanical device to reach a penetrating object. However, many people do not understand how to change the drill bit of the electric drill. Let's take a look at this knowledge together!

　　 How to change the drill bit

1. Disconnect the power supply of the electric drill in the first step, and unplug the power cord of the electric drill from the socket.

2. In the second step, put on the gloves with both hands, hold the electric drill firmly in one hand, pinch the hoist mouth of the electric drill in the other hand, and rotate it vigorously to expose the hole of the drill bit. Use the special key configured to twist and loosen the exposed hole of the drill bit.

3. In the third step, take out the drill bit to be installed, place it on the exposed hole position of the front end of the electric drill, and rotate the hand clockwise to lock the drill bit.

4. The fourth step is to adjust the depth position of the stuck bit into the hole position, and use the special key to tighten clockwise to lock.

5. In the fifth step, plug in the power cord plug of the hand drill to turn on the power, and idle for 2 seconds to observe whether the drill bit of the hand drill is firmly installed.

　　 Maintenance of hand drill bits

1. When drilling steel parts, please ensure sufficient cooling and use metal cutting fluid.

2. Good drill pipe rigidity and guide rail clearance can improve the accuracy of drilling and the life of drill bit

3. Make sure that the magnetic base and the workpiece are flat and clean.

4. Reinforce the workpiece when drilling thin plates, and ensure the stability of the workpiece when drilling large workpieces.

5. At the beginning and end of drilling, the feed rate should be reduced by 1/3.

6. A large amount of fine powder materials appear during drilling, such as cast iron, cast copper, etc., instead of using cooling liquid, compressed air can be used to help chip removal.

7. Please remove the iron filings wrapped around the drill body in time to ensure smooth chip removal.

　　 Safety operation rules for electric hand drill

1. The shell of the hand drill must be protected by grounding or zero neutral connection.

2. The wire of the hand drill should be well protected. It is strictly forbidden to drag it randomly to prevent it from being broken or cut, and it is not allowed to drag the wire into oily water to prevent the oily water from corroding the wire.

3. You must not wear gloves, jewelry and other items when using it to prevent the hand from being involved in the device and wear rubber shoes; when working in a humid place, you must work on a rubber pad or dry wooden board to prevent electric shock.

4. When leakage, vibration, high heat or abnormal sound of the electric drill are found during use, the work should be stopped immediately and an electrician checked and repaired.

5. When the electric drill has not completely stopped the rotation of L, the drill bit cannot be removed or replaced.

6. When the power fails to rest or leave the work place, the power should be cut off immediately.

7. Can not be used to drill cement and brick walls. Otherwise, it is easy to overload the motor and burn the motor. The key lies in the lack of impact mechanism in the motor and low bearing capacity.

The above content is to introduce to friends the knowledge about how to change the drill bit, the maintenance of the drill bit and the safe operation rules of the drill. The electric drill must be installed with a drill bit in order to play its normal function. If the drill bit is not installed correctly, it is prone to danger during use. Therefore, when changing the drill bit for the electric drill, you must determine whether the above several steps are used properly.